Fixes to AssertThatSize inspection after extending it for Maps in previous release as not all combinations for .hasSameSizeAs() are supported.

Bumped to IntelliJ IDEA 2019.2.3.

README.md

@@ -92,6 +92,23 @@ You can toggle the various inspections in the Settings/Editor/Inspections in the
   The behavior regarding the insertion of line breaks between the expressions can be configured in the
   inspection settings.
 
+- JoinVarArgsContains
+
+  Looks for ```.contains()```, ```.doesNotContain()```, and .```containsOnlyOnce()``` calls for iterables 
+  within the same statement. The available quickfix can join the arguments to variadic version of the call
+  and remove the surplus one.
+  
+  ```
+  from: assertThat(expected).contains("foo").doesNotContain("bar").contains("etc").doesNotContain("huh");
+    to: assertThat(expected).contains("foo", "etc").doesNotContain("bar", "huh");
+  ```
+  Will not be performed on more complex statements with ```.extracting()``` or ```.as()``` to avoid
+  changing semantics or losing descriptions.
+
+  Note that the quickfix does not handle comments very well and might remove them during the operation.
+  
+  You may need to perform some manual reformatting, if the line gets too long after applying the fix.
+
 - AssertThatObjectIsNullOrNotNull
 
   Uses ```isNull()``` and ```isNotNull()``` instead.
@@ -215,6 +232,32 @@ You can toggle the various inspections in the Settings/Editor/Inspections in the
   ```
   Analogously with ```isFalse()``` (except for ```containsAll()```).
 
+  Additional transformations for maps:
+
+  ```
+  from: assertThat(map.get(key)).isEqualTo(value);
+    to: assertThat(map).containsEntry(key, value);
+
+  from: assertThat(map.get(key)).isNotEqualTo(value);
+    to: assertThat(map).doesNotContainEntry(key, value);
+
+  from: assertThat(map.get(key)).isNotNull();
+    to: assertThat(map).containsKey(key);
+    
+  from: assertThat(map.get(key)).isNull();
+    to: assertThat(map).doesNotContainKey(key);
+  ```
+  
+  The last transformation is the default, but may not be 100% equivalent depending whether the map
+  is a degenerated case with ```null``` values, where ```map.get(key)``` returns ```null```,
+  but ```containsKey(key)``` is ```true```.
+  For that special case (which usually is the result of a bad design decision!)
+  the quickfix should rather generate ```assertThat(map).containsEntry(key, null)```.
+  Therefore, the behavior can be configured in the settings for this inspection to either
+  create the default case (```doesNotContainKey```), the degenerated case (```containsEntry```),
+  choosing between both fixes (does not work well for batch processing), or ignore this edge case
+  altogether (just to be sure to not break any code).
+
 - AssertThatEnumerableIsEmpty
 
   Uses ```isEmpty()``` for ```hasSize(0)``` iterable assertions instead.
@@ -226,7 +269,7 @@ You can toggle the various inspections in the Settings/Editor/Inspections in the
 
 - AssertThatSize
 
-  Makes assertions on sizes of arrays, collections, strings, 
+  Makes assertions on sizes of arrays, collections, maps, strings, 
   or ```CharSequence```s more concise.
 
   ```
@@ -248,7 +291,7 @@ You can toggle the various inspections in the Settings/Editor/Inspections in the
     to: assertThat(array).hasSameSizeAs(anotherArray);
   ```
 
-  and additionally with AssertJ 13.2.0 or later
+  and additionally with AssertJ 3.12.0 or later
 
   ```
   from: assertThat(array.length).isLessThanOrEqualTo(expression);
@@ -263,14 +306,14 @@ You can toggle the various inspections in the Settings/Editor/Inspections in the
   from: assertThat(array.length).isGreaterThanOrEqualTo(expression);
     to: assertThat(array).hasSizeGreaterThanOrEqualTo(expression);
   ```
-  and analogously for collections, strings and CharSequences, e.g:
+  and analogously for collections, maps, strings and CharSequences, e.g:
 
   ```
   from: assertThat("string".length()).isLessThan(1);
     to: assertThat("string").isEmpty();
 
-  from: assertThat("string".length()).isEqualTo(collection.size())
+  from: assertThat(map.size()).isEqualTo(anotherMap.size())
-    to: assertThat("string").hasSameSizeAs(collection);
+    to: assertThat(map).hasSameSizeAs(anotherMap);
     
   from: assertThat("string".length()).hasSize("strong".length())
     to: assertThat("string").hasSameSizeAs("strong");
@@ -343,7 +386,7 @@ You can toggle the various inspections in the Settings/Editor/Inspections in the
     to: assertThat(opt).isPresent();
      
   from: assertThat(opt).isEqualTo(Optional.of("foo"));
-  from: assertThat(opt).isEqualTo(Optional.ofNullable("foo"));
+  from: assertThat(opt).isEqualTo(Optional.ofNullable("foo")); // only for constant "foo"
     to: assertThat(opt).contains("foo"); 
 
   from: assertThat(opt).isEqualTo(Optional.empty());
@@ -380,7 +423,7 @@ You can toggle the various inspections in the Settings/Editor/Inspections in the
     to: assertThat(opt).isPresent();
      
   from: assertThat(opt).isEqualTo(Optional.of("foo"));
-  from: assertThat(opt).isEqualTo(Optional.fromNullable("foo"));
+  from: assertThat(opt).isEqualTo(Optional.fromNullable("foo")); // only for constant "foo"
     to: assertThat(opt).contains("foo"); 
 
   from: assertThat(opt).isEqualTo(Optional.absent());
@@ -509,7 +552,8 @@ The IntelliJ framework actually uses the JUnit 3 TestCase for plugin testing and
 Feel free to use the code (in package ```de.platon42.intellij.jupiter```) for your projects (with attribution).
 
 ## Planned features
-- Joining .contains() expressions
+- More Optional fixes such as opt1.get() == opt2.get() etc.
+- More moving out of methods for File, Path, LocalDate/Time etc.
 - Converting ```foo.compareTo(bar) == 0``` to ```isEqualTo()``` (yes, I've *really* seen code like that)
 - Extraction with property names to lambda with Java 8
 
@@ -520,6 +564,29 @@ Feel free to use the code (in package ```de.platon42.intellij.jupiter```) for yo
 
 ## Changelog
 
+#### V1.5 (24-Sep-19)
+- Fix for AssertThatCollectionOrMap inspection sometimes causing an index out of bounds exception.
+- AssertThatGuavaOptional inspections will now avoid conversions from ```.get()``` to ```.contains()```
+  for array types (currently not correctly supported by ```contains()``` in AssertJ-Guava).
+- Added an settings option for AssertThatCollectionOrMap inspection respecting the degenerated case of maps with ```null``` values.
+  It is now possible to change the behavior for ```map.get(key) == null```, so it can offer either ```.doesNotContainKey()``` (default)
+  or ```.containsEntry(key, null)```, or even both.
+- Fixes to AssertThatSize inspection after extending it for Maps in previous release as not all
+  combinations for ```.hasSameSizeAs()``` are supported.
+
+#### V1.4 (25-Aug-19)
+- Minor fix for highlighting of JoinVarArgsContains inspection.
+- Extended AssertThatSize inspection to Maps, too.
+- Extended AssertThatCollectionOrMap inspection for several ```assertThat(map.get())``` cases as suggested by Georgij G.
+
+#### V1.3 (03-Aug-19)
+- New JoinVarArgsContains inspection that will detect multiple ```.contains()```, ```.doesNotContain()```,
+  and ```.containsOnlyOnce()``` calls within the same statement that could be joined together using variadic arguments.
+- AssertJ 3.13.0 broke some inspections due to new ```AbstractStringAssert::isEqualTo()``` method.
+- AssertThatJava8Optional and AssertThatGuavaOptional inspections do not longer try to fix
+  ```assertThat(optional).isEqualTo(Optional.fromNullable(expression))``` to ```contains()```
+  when ```expression``` is not a non-null constant expression.
+  
 #### V1.2 (23-Jun-19)
 - Due to popular demand the JoinAssertThatStatements inspection will now add line breaks on joining statements.
   The amount of statements joined without causing line breaks can be configured but defaults to 1 (always).
@@ -582,7 +649,7 @@ Feel free to use the code (in package ```de.platon42.intellij.jupiter```) for yo
 #### V0.3 (07-Apr-19)
 - New inspection AssertThatBinaryExpressionIsTrueOrFalse that will find and fix common binary expressions and ```equals()``` statements (more than 150 combinations) inside ```assertThat()```.
 - Merged AssertThatObjectIsNull and AssertThatObjectIsNotNull to AssertThatObjectIsNullOrNotNull.
-- Support for ```hasSizeLessThan()```, ```hasSizeLessThanOrEqualTo()```, ```hasSizeGreaterThanOrEqualTo()```, and ```hasSizeGreaterThan()``` for AssertThatSizeInspection (with AssertJ >=13.2.0).
+- Support for ```hasSizeLessThan()```, ```hasSizeLessThanOrEqualTo()```, ```hasSizeGreaterThanOrEqualTo()```, and ```hasSizeGreaterThan()``` for AssertThatSizeInspection (with AssertJ >=3.12.0).
 - Really fixed highlighting for JUnit conversion. Sorry.
 
 #### V0.2 (01-Apr-19)

build.gradle

@@ -1,13 +1,13 @@
 plugins {
     id 'java'
-    id 'org.jetbrains.intellij' version '0.4.9'
+    id 'org.jetbrains.intellij' version '0.4.10'
-    id 'org.jetbrains.kotlin.jvm' version '1.3.40'
+    id 'org.jetbrains.kotlin.jvm' version '1.3.50'
     id 'jacoco'
-    id 'com.github.kt3k.coveralls' version '2.8.2'
+    id 'com.github.kt3k.coveralls' version '2.8.4'
 }
 
 group 'de.platon42'
-version '1.2'
+version '1.5'
 
 repositories {
     mavenCentral()
@@ -20,10 +20,10 @@ repositories {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
-    testCompile "org.assertj:assertj-core:3.12.2"
+    testCompile "org.assertj:assertj-core:3.13.2"
     testCompile "org.assertj:assertj-guava:3.2.1"
-    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.5.0-RC2'
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.5.2'
-    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.5.0-RC2'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.5.2'
     testImplementation "org.jetbrains.kotlin:kotlin-test"
 //    testImplementation "org.jetbrains.kotlin:kotlin-test-junit"
 }
@@ -35,17 +35,24 @@ compileTestKotlin {
     kotlinOptions.jvmTarget = "1.8"
 }
 intellij {
-    version '2019.1.3'
+    version '2019.2.3'
 //    pluginName 'Concise AssertJ Optimizing Nitpicker (Cajon)'
     updateSinceUntilBuild false
+    plugins = ['java']
 }
 
 patchPluginXml {
     changeNotes """
-  <h4>V1.2 (23-Jun-19)</h4>
+  <h4>V1.5 (24-Sep-19)</h4>
     <ul>
-      <li>Due to popular demand the JoinAssertThatStatements inspection will now add line breaks on joining statements.
+      <li>Fix for AssertThatCollectionOrMap inspection sometimes causing an index out of bounds exception.
-          The amount of statements joined without causing line breaks can be configured but defaults to 1 (always).
+      <li>AssertThatGuavaOptional inspections will now avoid conversions from .get() to .contains()
+          for array types (currently not correctly supported by AssertJ-Guava).
+      <li>Added an settings option for AssertThatCollectionOrMap inspection respecting the degenerated case of maps with null values.
+          It is now possible to change the behavior for map.get(key) == null, so it can offer either .doesNotContainKey() (default)
+          or .containsEntry(key, null), or even both.
+      <li>Fixes to AssertThatSize inspection after extending it for Maps in previous release as not all
+          combinations for .hasSameSizeAs() are supported.
     </ul>
   <p>Full changelog available at <a href="https://github.com/chrisly42/cajon-plugin#changelog">Github project site</a>.</p>
 """

src/main/java/de/platon42/intellij/plugins/cajon/AssertJClassNames.kt

@@ -30,12 +30,20 @@ class AssertJClassNames {
         @NonNls
         const val ABSTRACT_INTEGER_ASSERT_CLASSNAME = "org.assertj.core.api.AbstractIntegerAssert"
         @NonNls
+        const val ABSTRACT_LONG_ASSERT_CLASSNAME = "org.assertj.core.api.AbstractLongAssert"
+        @NonNls
+        const val ABSTRACT_FLOAT_ASSERT_CLASSNAME = "org.assertj.core.api.AbstractFloatAssert"
+        @NonNls
+        const val ABSTRACT_DOUBLE_ASSERT_CLASSNAME = "org.assertj.core.api.AbstractDoubleAssert"
+        @NonNls
         const val ABSTRACT_COMPARABLE_ASSERT_CLASSNAME = "org.assertj.core.api.AbstractComparableAssert"
         @NonNls
         const val ABSTRACT_STRING_ASSERT_CLASSNAME = "org.assertj.core.api.AbstractStringAssert"
         @NonNls
         const val ABSTRACT_CHAR_SEQUENCE_ASSERT_CLASSNAME = "org.assertj.core.api.AbstractCharSequenceAssert"
         @NonNls
+        const val ABSTRACT_MAP_ASSERT_CLASSNAME = "org.assertj.core.api.AbstractMapAssert"
+        @NonNls
         const val ABSTRACT_ITERABLE_ASSERT_CLASSNAME = "org.assertj.core.api.AbstractIterableAssert"
         @NonNls
         const val ABSTRACT_OPTIONAL_ASSERT_CLASSNAME = "org.assertj.core.api.AbstractOptionalAssert"

src/main/java/de/platon42/intellij/plugins/cajon/CommonMatchers.kt

@@ -36,14 +36,18 @@ val MORE_EXTENSION_POINTS = CallMatcher.instanceCall(
     "hasOnlyOneElementSatisfying", "anyMatch", "noneMatch", "anySatisfy", "noneSatisfy"
 )!!
 
-val NOT_ACTUAL_ASSERTIONS = CallMatcher.anyOf(
+val COMPLEX_CALLS_THAT_MAKES_STUFF_TRICKY = CallMatcher.anyOf(
-    ALL_ASSERT_THAT_MATCHERS,
     DESCRIBED_AS,
     WITH_REPRESENTATION_AND_SUCH,
     USING_COMPARATOR,
     IN_HEXADECIMAL_OR_BINARY
 )!!
 
+val NOT_ACTUAL_ASSERTIONS = CallMatcher.anyOf(
+    ALL_ASSERT_THAT_MATCHERS,
+    COMPLEX_CALLS_THAT_MAKES_STUFF_TRICKY
+)!!
+
 val KNOWN_METHODS_WITH_SIDE_EFFECTS = CallMatcher.anyOf(
     CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_ITERATOR, "next")
 )!!

src/main/java/de/platon42/intellij/plugins/cajon/Extensions.kt

@@ -106,7 +106,7 @@ fun PsiMethodCallExpression.getExpectedNullNonNullResult(): Boolean? {
     if (isNull || isNotNull) {
         return isNotNull
     } else {
-        val isEqualTo = AbstractAssertJInspection.IS_EQUAL_TO_OBJECT.test(this)
+        val isEqualTo = CallMatcher.anyOf(AbstractAssertJInspection.IS_EQUAL_TO_OBJECT, AbstractAssertJInspection.IS_EQUAL_TO_STRING).test(this)
         val isNotEqualTo = AbstractAssertJInspection.IS_NOT_EQUAL_TO_OBJECT.test(this)
         if ((isEqualTo || isNotEqualTo) && firstArg.type == PsiType.NULL) {
             return isNotEqualTo

src/main/java/de/platon42/intellij/plugins/cajon/MethodNames.kt

@@ -86,6 +86,8 @@ class MethodNames {
         @NonNls
         const val CONTAINS = "contains"
         @NonNls
+        const val CONTAINS_ONLY_ONCE = "containsOnlyOnce"
+        @NonNls
         const val DOES_NOT_CONTAIN = "doesNotContain"
         @NonNls
         const val CONTAINS_EXACTLY = "containsExactly"
@@ -100,6 +102,10 @@ class MethodNames {
         @NonNls
         const val DOES_NOT_CONTAIN_VALUE = "doesNotContainValue"
         @NonNls
+        const val CONTAINS_ENTRY = "containsEntry"
+        @NonNls
+        const val DOES_NOT_CONTAIN_ENTRY = "doesNotContainEntry"
+        @NonNls
         const val IS_EQUAL_TO_IC = "isEqualToIgnoringCase"
         @NonNls
         const val IS_NOT_EQUAL_TO_IC = "isNotEqualToIgnoringCase"

src/main/java/de/platon42/intellij/plugins/cajon/inspections/AbstractAssertJInspection.kt

@@ -9,10 +9,13 @@ import com.intellij.psi.search.GlobalSearchScope
 import com.intellij.psi.tree.IElementType
 import com.intellij.psi.util.PsiTypesUtil
 import com.siyeh.ig.callMatcher.CallMatcher
-import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ABSTRACT_ASSERT_CLASSNAME
 import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ABSTRACT_BOOLEAN_ASSERT_CLASSNAME
 import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ABSTRACT_COMPARABLE_ASSERT_CLASSNAME
+import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ABSTRACT_DOUBLE_ASSERT_CLASSNAME
+import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ABSTRACT_FLOAT_ASSERT_CLASSNAME
 import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ABSTRACT_INTEGER_ASSERT_CLASSNAME
+import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ABSTRACT_LONG_ASSERT_CLASSNAME
+import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ABSTRACT_STRING_ASSERT_CLASSNAME
 import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ASSERTIONS_CLASSNAME
 import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ASSERT_INTERFACE
 import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ENUMERABLE_ASSERT_INTERFACE
@@ -81,13 +84,32 @@ open class AbstractAssertJInspection : AbstractBaseJavaLocalInspectionTool() {
 
         val IS_EQUAL_TO_OBJECT = CallMatcher.instanceCall(ASSERT_INTERFACE, MethodNames.IS_EQUAL_TO)
             .parameterTypes(CommonClassNames.JAVA_LANG_OBJECT)!!
-        val IS_NOT_EQUAL_TO_OBJECT = CallMatcher.instanceCall(ASSERT_INTERFACE, MethodNames.IS_NOT_EQUAL_TO)
+        val IS_EQUAL_TO_STRING = CallMatcher.instanceCall(ABSTRACT_STRING_ASSERT_CLASSNAME, MethodNames.IS_EQUAL_TO)
-            .parameterTypes(CommonClassNames.JAVA_LANG_OBJECT)!!
+            .parameterTypes(CommonClassNames.JAVA_LANG_STRING)!!
+        val IS_EQUAL_TO_INT = CallMatcher.instanceCall(ABSTRACT_INTEGER_ASSERT_CLASSNAME, MethodNames.IS_EQUAL_TO)
+            .parameterTypes("int")!!
+        val IS_EQUAL_TO_LONG = CallMatcher.instanceCall(ABSTRACT_LONG_ASSERT_CLASSNAME, MethodNames.IS_EQUAL_TO)
+            .parameterTypes("long")!!
+        val IS_EQUAL_TO_FLOAT = CallMatcher.instanceCall(ABSTRACT_FLOAT_ASSERT_CLASSNAME, MethodNames.IS_EQUAL_TO)
+            .parameterTypes("float")!!
+        val IS_EQUAL_TO_DOUBLE = CallMatcher.instanceCall(ABSTRACT_DOUBLE_ASSERT_CLASSNAME, MethodNames.IS_EQUAL_TO)
+            .parameterTypes("double")!!
         val IS_EQUAL_TO_BOOLEAN = CallMatcher.instanceCall(ABSTRACT_BOOLEAN_ASSERT_CLASSNAME, MethodNames.IS_EQUAL_TO)
             .parameterTypes("boolean")!!
-        val IS_NOT_EQUAL_TO_BOOLEAN =
+
-            CallMatcher.instanceCall(ABSTRACT_BOOLEAN_ASSERT_CLASSNAME, MethodNames.IS_NOT_EQUAL_TO)
+        val IS_NOT_EQUAL_TO_OBJECT = CallMatcher.instanceCall(ASSERT_INTERFACE, MethodNames.IS_NOT_EQUAL_TO)
+            .parameterTypes(CommonClassNames.JAVA_LANG_OBJECT)!!
+        val IS_NOT_EQUAL_TO_BOOLEAN = CallMatcher.instanceCall(ABSTRACT_BOOLEAN_ASSERT_CLASSNAME, MethodNames.IS_NOT_EQUAL_TO)
             .parameterTypes("boolean")!!
+        val IS_NOT_EQUAL_TO_INT = CallMatcher.instanceCall(ABSTRACT_INTEGER_ASSERT_CLASSNAME, MethodNames.IS_NOT_EQUAL_TO)
+            .parameterTypes("int")!!
+        val IS_NOT_EQUAL_TO_LONG = CallMatcher.instanceCall(ABSTRACT_LONG_ASSERT_CLASSNAME, MethodNames.IS_NOT_EQUAL_TO)
+            .parameterTypes("long")!!
+        val IS_NOT_EQUAL_TO_FLOAT = CallMatcher.instanceCall(ABSTRACT_FLOAT_ASSERT_CLASSNAME, MethodNames.IS_NOT_EQUAL_TO)
+            .parameterTypes("float")!!
+        val IS_NOT_EQUAL_TO_DOUBLE = CallMatcher.instanceCall(ABSTRACT_DOUBLE_ASSERT_CLASSNAME, MethodNames.IS_NOT_EQUAL_TO)
+            .parameterTypes("double")!!
+
         val IS_SAME_AS_OBJECT = CallMatcher.instanceCall(ASSERT_INTERFACE, MethodNames.IS_SAME_AS)
             .parameterTypes(CommonClassNames.JAVA_LANG_OBJECT)!!
         val IS_NOT_SAME_AS_OBJECT = CallMatcher.instanceCall(ASSERT_INTERFACE, MethodNames.IS_NOT_SAME_AS)
@@ -103,8 +125,6 @@ open class AbstractAssertJInspection : AbstractBaseJavaLocalInspectionTool() {
         val HAS_SIZE = CallMatcher.instanceCall(ENUMERABLE_ASSERT_INTERFACE, MethodNames.HAS_SIZE)
             .parameterTypes("int")!!
 
-        val IS_EQUAL_TO_INT = CallMatcher.instanceCall(ABSTRACT_ASSERT_CLASSNAME, MethodNames.IS_EQUAL_TO)
-            .parameterTypes("int")!!
         val IS_GREATER_THAN_INT = CallMatcher.instanceCall(ABSTRACT_COMPARABLE_ASSERT_CLASSNAME, MethodNames.IS_GREATER_THAN)
             .parameterTypes("int")!!
         val IS_GREATER_THAN_OR_EQUAL_TO_INT = CallMatcher.instanceCall(ABSTRACT_COMPARABLE_ASSERT_CLASSNAME, MethodNames.IS_GREATER_THAN_OR_EQUAL_TO)
@@ -127,6 +147,8 @@ open class AbstractAssertJInspection : AbstractBaseJavaLocalInspectionTool() {
 
         val COLLECTION_SIZE = CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_COLLECTION, "size")
             .parameterCount(0)!!
+        val MAP_SIZE = CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_MAP, "size")
+            .parameterCount(0)!!
         val CHAR_SEQUENCE_LENGTH = CallMatcher.instanceCall("java.lang.CharSequence", "length")
             .parameterCount(0)!!
         val OBJECT_EQUALS = CallMatcher.instanceCall(CommonClassNames.JAVA_LANG_OBJECT, "equals")
@@ -205,6 +227,20 @@ open class AbstractAssertJInspection : AbstractBaseJavaLocalInspectionTool() {
         holder.registerProblem(expression, message, quickfix)
     }
 
+    protected fun registerMoveOutMethod(
+        holder: ProblemsHolder,
+        expression: PsiMethodCallExpression,
+        oldActualExpression: PsiMethodCallExpression,
+        replacementMethod: String,
+        quickFixSupplier: (String) -> List<LocalQuickFix>
+    ) {
+        val originalMethod = getOriginalMethodName(oldActualExpression) ?: return
+        val description = MOVE_ACTUAL_EXPRESSION_DESCRIPTION_TEMPLATE.format(originalMethod, replacementMethod)
+        val message = MOVING_OUT_MESSAGE_TEMPLATE.format(originalMethod)
+        val quickfixes = quickFixSupplier(description)
+        holder.registerProblem(expression, message, *quickfixes.toTypedArray())
+    }
+
     protected fun registerReplaceMethod(
         holder: ProblemsHolder,
         expression: PsiMethodCallExpression,

src/main/java/de/platon42/intellij/plugins/cajon/inspections/AssertThatCollectionOrMapExpressionInspection.kt

@@ -1,38 +1,65 @@
 package de.platon42.intellij.plugins.cajon.inspections
 
 import com.intellij.codeInspection.ProblemsHolder
+import com.intellij.openapi.ui.ComboBox
 import com.intellij.psi.*
+import com.intellij.util.ui.FormBuilder
 import com.siyeh.ig.callMatcher.CallMatcher
 import de.platon42.intellij.plugins.cajon.*
 import de.platon42.intellij.plugins.cajon.quickfixes.MoveOutMethodCallExpressionQuickFix
+import java.awt.BorderLayout
+import javax.swing.JComponent
+import javax.swing.JPanel
+
 
 class AssertThatCollectionOrMapExpressionInspection : AbstractAssertJInspection() {
 
     companion object {
         private const val DISPLAY_NAME = "Asserting a collection or map specific expression"
+        private const val DEFAULT_MAP_VALUES_NEVER_NULL = 2
+
+        private val MAP_GET_MATCHER = CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_MAP, "get").parameterCount(1)
+
+        private val ANY_IS_EQUAL_TO_MATCHER = CallMatcher.anyOf(
+            IS_EQUAL_TO_OBJECT,
+            IS_EQUAL_TO_STRING,
+            IS_EQUAL_TO_INT,
+            IS_EQUAL_TO_LONG,
+            IS_EQUAL_TO_FLOAT,
+            IS_EQUAL_TO_DOUBLE,
+            IS_EQUAL_TO_BOOLEAN
+        )
+        private val ANY_IS_NOT_EQUAL_TO_MATCHER = CallMatcher.anyOf(
+            IS_NOT_EQUAL_TO_OBJECT,
+            IS_NOT_EQUAL_TO_INT,
+            IS_NOT_EQUAL_TO_LONG,
+            IS_NOT_EQUAL_TO_FLOAT,
+            IS_NOT_EQUAL_TO_DOUBLE,
+            IS_NOT_EQUAL_TO_BOOLEAN
+        )
 
         private val MAPPINGS = listOf(
             Mapping(
                 CallMatcher.anyOf(
-                    CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_COLLECTION, "isEmpty").parameterCount(0),
+                    CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_COLLECTION, MethodNames.IS_EMPTY).parameterCount(0),
-                    CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_MAP, "isEmpty").parameterCount(0)
+                    CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_MAP, MethodNames.IS_EMPTY).parameterCount(0)
                 ),
                 MethodNames.IS_EMPTY, MethodNames.IS_NOT_EMPTY
             ),
             Mapping(
-                CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_COLLECTION, "contains").parameterCount(1),
+                CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_COLLECTION, MethodNames.CONTAINS).parameterCount(1),
                 MethodNames.CONTAINS, MethodNames.DOES_NOT_CONTAIN
             ),
             Mapping(
-                CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_COLLECTION, "containsAll").parameterCount(1),
+                CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_COLLECTION, MethodNames.CONTAINS_ALL).parameterCount(1),
                 MethodNames.CONTAINS_ALL, null
             ),
             Mapping(
-                CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_MAP, "containsKey").parameterCount(1),
+                CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_MAP, MethodNames.CONTAINS_KEY).parameterCount(1),
                 MethodNames.CONTAINS_KEY, MethodNames.DOES_NOT_CONTAIN_KEY
             ),
             Mapping(
-                CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_MAP, "containsValue").parameterCount(1),
+                CallMatcher.instanceCall(CommonClassNames.JAVA_UTIL_MAP, MethodNames.CONTAINS_VALUE).parameterCount(1),
                 MethodNames.CONTAINS_VALUE, MethodNames.DOES_NOT_CONTAIN_VALUE
             )
         )
@@ -40,18 +67,78 @@ class AssertThatCollectionOrMapExpressionInspection : AbstractAssertJInspection(
 
     override fun getDisplayName() = DISPLAY_NAME
 
+    @JvmField
+    var behaviorForMapValueEqualsNull: Int = DEFAULT_MAP_VALUES_NEVER_NULL
+
     override fun buildVisitor(holder: ProblemsHolder, isOnTheFly: Boolean): PsiElementVisitor {
         return object : JavaElementVisitor() {
             override fun visitExpressionStatement(statement: PsiExpressionStatement) {
                 super.visitExpressionStatement(statement)
                 if (!statement.hasAssertThat()) return
                 val staticMethodCall = statement.findStaticMethodCall() ?: return
-                if (!ASSERT_THAT_BOOLEAN.test(staticMethodCall)) return
 
-                val assertThatArgument = staticMethodCall.firstArg as? PsiMethodCallExpression ?: return
+                val assertThatArgument = staticMethodCall.getArgOrNull(0) as? PsiMethodCallExpression ?: return
+                val expectedCallExpression = statement.findOutmostMethodCall() ?: return
+                if (MAP_GET_MATCHER.test(assertThatArgument)) {
+                    val nullOrNotNull = expectedCallExpression.getAllTheSameNullNotNullConstants()
+                    if (nullOrNotNull == true) {
+                        registerMoveOutMethod(holder, expectedCallExpression, assertThatArgument, MethodNames.CONTAINS_KEY) { desc, method ->
+                            MoveOutMethodCallExpressionQuickFix(desc, method, useNullNonNull = true)
+                        }
+                    } else if (nullOrNotNull == false) {
+                        when (behaviorForMapValueEqualsNull) {
+                            1 -> // warning only
+                                registerMoveOutMethod(
+                                    holder,
+                                    expectedCallExpression,
+                                    assertThatArgument,
+                                    ""
+                                ) { _ -> emptyList() }
+                            2 -> // as doesNotContainKey(key)
+                                registerMoveOutMethod(holder, expectedCallExpression, assertThatArgument, MethodNames.DOES_NOT_CONTAIN_KEY) { desc, method ->
+                                    MoveOutMethodCallExpressionQuickFix(desc, method, useNullNonNull = true)
+                                }
+                            3 -> // as containsEntry(key, null)
+                                registerMoveOutMethod(holder, expectedCallExpression, assertThatArgument, MethodNames.CONTAINS_ENTRY) { desc, method ->
+                                    MoveOutMethodCallExpressionQuickFix(desc, method, keepExpectedAsSecondArgument = true, useNullNonNull = true)
+                                }
+                            4 -> // both
+                                registerMoveOutMethod(
+                                    holder,
+                                    expectedCallExpression,
+                                    assertThatArgument,
+                                    MethodNames.DOES_NOT_CONTAIN_KEY + "/" + MethodNames.CONTAINS_ENTRY
+                                ) { desc ->
+                                    listOf(
+                                        MoveOutMethodCallExpressionQuickFix(
+                                            "Remove get() of actual expression and use assertThat().doesNotContainKey() instead (regular map)",
+                                            MethodNames.DOES_NOT_CONTAIN_KEY,
+                                            useNullNonNull = true
+                                        ),
+                                        MoveOutMethodCallExpressionQuickFix(
+                                            "Remove get() of actual expression and use assertThat().containsEntry(key, null) instead (degenerated map)",
+                                            MethodNames.CONTAINS_ENTRY,
+                                            keepExpectedAsSecondArgument = true,
+                                            useNullNonNull = true
+                                        )
+                                    )
+                                }
+                        }
+                    } else {
+                        if (ANY_IS_EQUAL_TO_MATCHER.test(expectedCallExpression)) {
+                            registerMoveOutMethod(holder, expectedCallExpression, assertThatArgument, MethodNames.CONTAINS_ENTRY) { desc, method ->
+                                MoveOutMethodCallExpressionQuickFix(desc, method, keepExpectedAsSecondArgument = true)
+                            }
+                        } else if (ANY_IS_NOT_EQUAL_TO_MATCHER.test(expectedCallExpression)) {
+                            registerMoveOutMethod(holder, expectedCallExpression, assertThatArgument, MethodNames.DOES_NOT_CONTAIN_ENTRY) { desc, method ->
+                                MoveOutMethodCallExpressionQuickFix(desc, method, keepExpectedAsSecondArgument = true)
+                            }
+                        }
+                    }
+                } else {
+                    if (!ASSERT_THAT_BOOLEAN.test(staticMethodCall)) return
                     val mapping = MAPPINGS.firstOrNull { it.callMatcher.test(assertThatArgument) } ?: return
 
-                val expectedCallExpression = statement.findOutmostMethodCall() ?: return
                     val expectedResult = expectedCallExpression.getAllTheSameExpectedBooleanConstants() ?: return
 
                     val replacementMethod = if (expectedResult) mapping.replacementForTrue else mapping.replacementForFalse ?: return
@@ -61,6 +148,21 @@ class AssertThatCollectionOrMapExpressionInspection : AbstractAssertJInspection(
                 }
             }
         }
+    }
+
+    override fun createOptionsPanel(): JComponent {
+        val comboBox = ComboBox(
+            arrayOf("ignore", "warning only, no fixes", "as doesNotContainKey(key)", "as containsEntry(key, null)", "both choices")
+        )
+        comboBox.selectedIndex = behaviorForMapValueEqualsNull
+        comboBox.addActionListener { behaviorForMapValueEqualsNull = comboBox.selectedIndex }
+        val panel = JPanel(BorderLayout())
+        panel.add(
+            FormBuilder.createFormBuilder().addLabeledComponent("Fix get() on maps expecting null values:", comboBox).panel,
+            BorderLayout.NORTH
+        )
+        return panel
+    }
 
     private class Mapping(
         val callMatcher: CallMatcher,

src/main/java/de/platon42/intellij/plugins/cajon/inspections/AssertThatGuavaOptionalInspection.kt

@@ -29,8 +29,9 @@ class AssertThatGuavaOptionalInspection : AbstractAssertJInspection() {
                 val actualExpression = staticMethodCall.firstArg as? PsiMethodCallExpression ?: return
                 val outmostMethodCall = statement.findOutmostMethodCall() ?: return
                 if (GUAVA_OPTIONAL_GET.test(actualExpression)) {
+                    if (actualExpression.resolveMethod()?.returnType is PsiArrayType) return
                     val expectedCallExpression = staticMethodCall.gatherAssertionCalls().singleOrNull() ?: return
-                    if (IS_EQUAL_TO_OBJECT.test(expectedCallExpression)) {
+                    if (CallMatcher.anyOf(IS_EQUAL_TO_OBJECT, IS_EQUAL_TO_STRING).test(expectedCallExpression)) {
                         registerMoveOutMethod(holder, outmostMethodCall, actualExpression, MethodNames.CONTAINS) { desc, method ->
                             QuickFixWithPostfixDelegate(
                                 RemoveActualOutmostMethodCallQuickFix(desc, method),
@@ -70,6 +71,9 @@ class AssertThatGuavaOptionalInspection : AbstractAssertJInspection() {
                 if (IS_EQUAL_TO_OBJECT.test(expression)) {
                     val innerExpectedCall = expression.firstArg as? PsiMethodCallExpression ?: return
                     if (CallMatcher.anyOf(GUAVA_OPTIONAL_OF, GUAVA_OPTIONAL_FROM_NULLABLE).test(innerExpectedCall)) {
+                        if (GUAVA_OPTIONAL_FROM_NULLABLE.test(innerExpectedCall)) {
+                            innerExpectedCall.firstArg.calculateConstantValue() ?: return
+                        }
                         registerRemoveExpectedOutmostMethod(holder, expression, expression, MethodNames.CONTAINS) { desc, method ->
                             QuickFixWithPostfixDelegate(
                                 UnwrapExpectedStaticMethodCallQuickFix(desc, method),

src/main/java/de/platon42/intellij/plugins/cajon/inspections/AssertThatJava8OptionalInspection.kt

@@ -28,7 +28,7 @@ class AssertThatJava8OptionalInspection : AbstractAssertJInspection() {
                 val outmostMethodCall = statement.findOutmostMethodCall() ?: return
                 if (OPTIONAL_GET.test(actualExpression)) {
                     val expectedCallExpression = staticMethodCall.gatherAssertionCalls().singleOrNull() ?: return
-                    if (IS_EQUAL_TO_OBJECT.test(expectedCallExpression)) {
+                    if (CallMatcher.anyOf(IS_EQUAL_TO_OBJECT, IS_EQUAL_TO_STRING).test(expectedCallExpression)) {
                         registerMoveOutMethod(holder, outmostMethodCall, actualExpression, MethodNames.CONTAINS) { desc, method ->
                             RemoveActualOutmostMethodCallQuickFix(desc, method)
                         }
@@ -60,6 +60,9 @@ class AssertThatJava8OptionalInspection : AbstractAssertJInspection() {
                 if (IS_EQUAL_TO_OBJECT.test(expression)) {
                     val innerExpectedCall = expression.firstArg as? PsiMethodCallExpression ?: return
                     if (CallMatcher.anyOf(OPTIONAL_OF, OPTIONAL_OF_NULLABLE).test(innerExpectedCall)) {
+                        if (OPTIONAL_OF_NULLABLE.test(innerExpectedCall)) {
+                            innerExpectedCall.firstArg.calculateConstantValue() ?: return
+                        }
                         registerRemoveExpectedOutmostMethod(holder, expression, expression, MethodNames.CONTAINS, ::UnwrapExpectedStaticMethodCallQuickFix)
                     } else if (OPTIONAL_EMPTY.test(innerExpectedCall)) {
                         registerSimplifyMethod(holder, expression, MethodNames.IS_NOT_PRESENT)

src/main/java/de/platon42/intellij/plugins/cajon/inspections/AssertThatObjectExpressionInspection.kt

@@ -38,7 +38,7 @@ class AssertThatObjectExpressionInspection : AbstractAssertJInspection() {
                         }
                     }
                     OBJECT_TO_STRING.test(assertThatArgument) -> {
-                        staticMethodCall.findFluentCallTo(IS_EQUAL_TO_OBJECT) ?: return
+                        staticMethodCall.findFluentCallTo(IS_EQUAL_TO_OBJECT) ?: staticMethodCall.findFluentCallTo(IS_EQUAL_TO_STRING) ?: return
                         registerMoveOutMethod(holder, expectedCallExpression, assertThatArgument, MethodNames.HAS_TO_STRING) { desc, method ->
                             RemoveActualOutmostMethodCallQuickFix(desc, method)
                         }

src/main/java/de/platon42/intellij/plugins/cajon/inspections/AssertThatObjectIsNullOrNotNullInspection.kt

@@ -2,6 +2,7 @@ package de.platon42.intellij.plugins.cajon.inspections
 
 import com.intellij.codeInspection.ProblemsHolder
 import com.intellij.psi.*
+import com.siyeh.ig.callMatcher.CallMatcher
 import de.platon42.intellij.plugins.cajon.MethodNames
 import de.platon42.intellij.plugins.cajon.firstArg
 import de.platon42.intellij.plugins.cajon.hasAssertThat
@@ -21,7 +22,7 @@ class AssertThatObjectIsNullOrNotNullInspection : AbstractAssertJInspection() {
                 super.visitMethodCallExpression(expression)
                 if (!expression.hasAssertThat()) return
                 val isNotEqualTo = IS_NOT_EQUAL_TO_OBJECT.test(expression)
-                val isEqualTo = IS_EQUAL_TO_OBJECT.test(expression)
+                val isEqualTo = CallMatcher.anyOf(IS_EQUAL_TO_OBJECT, IS_EQUAL_TO_STRING).test(expression)
                 val isLastExpression = expression.parent is PsiStatement
                 if (!((isEqualTo && isLastExpression) || isNotEqualTo)) return
 

src/main/java/de/platon42/intellij/plugins/cajon/inspections/AssertThatSizeInspection.kt

@@ -5,13 +5,14 @@ import com.intellij.psi.*
 import de.platon42.intellij.plugins.cajon.*
 import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ABSTRACT_CHAR_SEQUENCE_ASSERT_CLASSNAME
 import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ABSTRACT_ITERABLE_ASSERT_CLASSNAME
+import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ABSTRACT_MAP_ASSERT_CLASSNAME
 import de.platon42.intellij.plugins.cajon.quickfixes.ReplaceHasSizeMethodCallQuickFix
 import de.platon42.intellij.plugins.cajon.quickfixes.ReplaceSizeMethodCallQuickFix
 
 class AssertThatSizeInspection : AbstractAssertJInspection() {
 
     companion object {
-        private const val DISPLAY_NAME = "Asserting the size of an collection, array or string"
+        private const val DISPLAY_NAME = "Asserting the size of an collection, map, array or string"
         private const val REMOVE_SIZE_DESCRIPTION_TEMPLATE = "Remove size determination of expected expression and replace %s() with %s()"
         private const val REMOVE_ALL_MESSAGE = "Try to operate on the iterable itself rather than its size"
 
@@ -26,13 +27,15 @@ class AssertThatSizeInspection : AbstractAssertJInspection() {
 
         private fun isCollectionSize(expression: PsiExpression) = (expression is PsiMethodCallExpression) && COLLECTION_SIZE.test(expression)
 
+        private fun isMapSize(expression: PsiExpression) = (expression is PsiMethodCallExpression) && MAP_SIZE.test(expression)
+
         private fun isArrayLength(expression: PsiExpression): Boolean {
             val psiReferenceExpression = expression as? PsiReferenceExpression ?: return false
             return ((psiReferenceExpression.qualifierExpression?.type is PsiArrayType)
                     && ((psiReferenceExpression.resolve() as? PsiField)?.name == "length"))
         }
 
-        fun getMatch(expression: PsiMethodCallExpression, isForArrayOrCollection: Boolean, isForString: Boolean): Match? {
+        fun getMatch(expression: PsiMethodCallExpression, isForArrayOrCollection: Boolean, isForMap: Boolean, isForString: Boolean): Match? {
             val isLastExpression = expression.parent is PsiStatement
             val constValue = expression.calculateConstantParameterValue(0)
             if (IS_EQUAL_TO_INT.test(expression)) {
@@ -40,8 +43,11 @@ class AssertThatSizeInspection : AbstractAssertJInspection() {
                     Match(expression, MethodNames.IS_EMPTY, noExpectedExpression = true)
                 } else {
                     val equalToExpression = expression.firstArg
-                    if (isForArrayOrCollection && (isCollectionSize(equalToExpression) || isArrayLength(equalToExpression)) ||
+                    val equalsArrayOrCollectionSize = isArrayLength(equalToExpression) ||
-                        isForString && (isCollectionSize(equalToExpression) || isArrayLength(equalToExpression) || isCharSequenceLength(equalToExpression))
+                            isCollectionSize(equalToExpression)
+                    if ((isForArrayOrCollection && equalsArrayOrCollectionSize)
+                        || (isForMap && (equalsArrayOrCollectionSize || isMapSize(equalToExpression)))
+                        || (isForString && (equalsArrayOrCollectionSize || isCharSequenceLength(equalToExpression)))
                     ) {
                         Match(expression, MethodNames.HAS_SAME_SIZE_AS, expectedIsCollection = true)
                     } else {
@@ -59,7 +65,7 @@ class AssertThatSizeInspection : AbstractAssertJInspection() {
                     val replacementMethod = isTestForEmpty.map(MethodNames.IS_EMPTY, MethodNames.IS_NOT_EMPTY)
                     return Match(expression, replacementMethod, noExpectedExpression = true)
                 } else if (hasAssertJMethod(expression, ABSTRACT_ITERABLE_ASSERT_CLASSNAME, MethodNames.HAS_SIZE_LESS_THAN)) {
-                    // new stuff in AssertJ 13.2.0
+                    // new stuff in AssertJ 3.12.0
                     val replacementMethod = BONUS_EXPRESSIONS_CALL_MATCHER_MAP.find { it.first.test(expression) }?.second ?: return null
                     return Match(expression, replacementMethod)
                 }
@@ -80,11 +86,12 @@ class AssertThatSizeInspection : AbstractAssertJInspection() {
 
                 val actualExpression = staticMethodCall.firstArg
                 val isForArrayOrCollection = isArrayLength(actualExpression) || isCollectionSize(actualExpression)
+                val isForMap = isMapSize(actualExpression)
                 val isForString = isCharSequenceLength(actualExpression)
-                if (!(isForArrayOrCollection || isForString)) return
+                if (!(isForArrayOrCollection || isForMap || isForString)) return
 
                 val matches = staticMethodCall.collectMethodCallsUpToStatement()
-                    .mapNotNull { getMatch(it, isForArrayOrCollection, isForString) }
+                    .mapNotNull { getMatch(it, isForArrayOrCollection, isForMap, isForString) }
                     .toList()
                 if (matches.isNotEmpty()) {
                     if (matches.size == 1) {
@@ -113,8 +120,10 @@ class AssertThatSizeInspection : AbstractAssertJInspection() {
                 val actualExpression = expression.firstArg
 
                 val isForArrayOrCollection = isArrayLength(actualExpression) || isCollectionSize(actualExpression)
+                val isForMap = isMapSize(actualExpression)
                 val isForString = isCharSequenceLength(actualExpression)
                 if (!(isForArrayOrCollection
+                            || (isForMap && checkAssertedType(expression, ABSTRACT_MAP_ASSERT_CLASSNAME))
                             || (isForString && checkAssertedType(expression, ABSTRACT_CHAR_SEQUENCE_ASSERT_CLASSNAME)))
                 ) return
 

src/main/java/de/platon42/intellij/plugins/cajon/inspections/AssertThatStringIsEmptyInspection.kt

@@ -5,6 +5,7 @@ import com.intellij.psi.JavaElementVisitor
 import com.intellij.psi.PsiElementVisitor
 import com.intellij.psi.PsiMethodCallExpression
 import com.intellij.psi.PsiStatement
+import com.siyeh.ig.callMatcher.CallMatcher
 import de.platon42.intellij.plugins.cajon.AssertJClassNames.Companion.ABSTRACT_CHAR_SEQUENCE_ASSERT_CLASSNAME
 import de.platon42.intellij.plugins.cajon.MethodNames
 import de.platon42.intellij.plugins.cajon.calculateConstantParameterValue
@@ -23,7 +24,7 @@ class AssertThatStringIsEmptyInspection : AbstractAssertJInspection() {
             override fun visitMethodCallExpression(expression: PsiMethodCallExpression) {
                 super.visitMethodCallExpression(expression)
                 if (!expression.hasAssertThat()) return
-                val isEqual = IS_EQUAL_TO_OBJECT.test(expression)
+                val isEqual = CallMatcher.anyOf(IS_EQUAL_TO_OBJECT, IS_EQUAL_TO_STRING).test(expression)
                 val hasSize = HAS_SIZE.test(expression)
                 val isLastExpression = expression.parent is PsiStatement
                 if (!((isEqual || hasSize) && isLastExpression)) return

src/main/java/de/platon42/intellij/plugins/cajon/inspections/ImplicitAssertionInspection.kt

@@ -29,7 +29,7 @@ class ImplicitAssertionInspection : AbstractAssertJInspection() {
 
         private val OBJECT_ENUMERABLE_ANY_CONTENT_ASSERTIONS = CallMatcher.instanceCall(
             AssertJClassNames.OBJECT_ENUMERABLE_ASSERT_INTERFACE,
-            MethodNames.CONTAINS, "containsOnly", "containsOnlyNulls", "containsOnlyOnce",
+            MethodNames.CONTAINS, "containsOnly", "containsOnlyNulls", MethodNames.CONTAINS_ONLY_ONCE,
             "containsExactly", "containsExactlyInAnyOrder", "containsExactlyInAnyOrderElementsOf",
             "containsAll", "containsAnyOf",
             "containsAnyElementsOf", "containsExactlyElementsOf", "containsOnlyElementsOf",

src/main/java/de/platon42/intellij/plugins/cajon/inspections/JoinVarArgsContainsInspection.kt

@@ -0,0 +1,53 @@
+package de.platon42.intellij.plugins.cajon.inspections
+
+import com.intellij.codeInspection.ProblemsHolder
+import com.intellij.openapi.util.TextRange
+import com.intellij.psi.JavaElementVisitor
+import com.intellij.psi.PsiElementVisitor
+import com.intellij.psi.PsiExpressionStatement
+import com.intellij.psi.PsiMethodCallExpression
+import com.intellij.psi.util.PsiTreeUtil
+import com.siyeh.ig.callMatcher.CallMatcher
+import de.platon42.intellij.plugins.cajon.*
+import de.platon42.intellij.plugins.cajon.quickfixes.JoinVarArgsContainsQuickFix
+
+class JoinVarArgsContainsInspection : AbstractAssertJInspection() {
+
+    companion object {
+        private const val DISPLAY_NAME = "Join arguments to variadic for contains()/containsOnlyOnce()/doesNotContain()"
+        private const val JOIN_VARARGS_MESSAGE = "Calls to same methods may be joined to variadic version"
+
+        private val MATCHERS = listOf(MethodNames.CONTAINS, MethodNames.CONTAINS_ONLY_ONCE, MethodNames.DOES_NOT_CONTAIN)
+            .map { CallMatcher.instanceCall(AssertJClassNames.ABSTRACT_ITERABLE_ASSERT_CLASSNAME, it) }
+    }
+
+    override fun getDisplayName() = DISPLAY_NAME
+
+    override fun buildVisitor(holder: ProblemsHolder, isOnTheFly: Boolean): PsiElementVisitor {
+        return object : JavaElementVisitor() {
+            override fun visitExpressionStatement(statement: PsiExpressionStatement) {
+                super.visitStatement(statement)
+                if (!statement.hasAssertThat()) return
+                val assertThatCall = PsiTreeUtil.findChildrenOfType(statement, PsiMethodCallExpression::class.java).find { ALL_ASSERT_THAT_MATCHERS.test(it) } ?: return
+
+                val allCalls = assertThatCall.collectMethodCallsUpToStatement().toList()
+
+                if (allCalls.find(COMPLEX_CALLS_THAT_MAKES_STUFF_TRICKY::test) != null) return
+
+                val onlyAssertionCalls = allCalls
+                    .filterNot { NOT_ACTUAL_ASSERTIONS.test(it) }
+                    .toList()
+
+                for (methodMatcher in MATCHERS) {
+                    if (onlyAssertionCalls.count(methodMatcher::test) > 1) {
+                        val outmostMethodCall = statement.findOutmostMethodCall() ?: return
+                        val quickFix = JoinVarArgsContainsQuickFix(MATCHERS)
+                        val textRange = TextRange(assertThatCall.textLength, outmostMethodCall.textLength)
+                        holder.registerProblem(outmostMethodCall, textRange, JOIN_VARARGS_MESSAGE, quickFix)
+                        return
+                    }
+                }
+            }
+        }
+    }
+}

src/main/java/de/platon42/intellij/plugins/cajon/quickfixes/JoinVarArgsContainsQuickFix.kt

@@ -0,0 +1,38 @@
+package de.platon42.intellij.plugins.cajon.quickfixes
+
+import com.intellij.codeInspection.ProblemDescriptor
+import com.intellij.openapi.project.Project
+import com.intellij.psi.PsiMethodCallExpression
+import com.siyeh.ig.callMatcher.CallMatcher
+import de.platon42.intellij.plugins.cajon.*
+
+class JoinVarArgsContainsQuickFix(private val matchers: Iterable<CallMatcher>) : AbstractCommonQuickFix(JOIN_VARARGS_DESCRIPTION) {
+
+    companion object {
+        private const val JOIN_VARARGS_DESCRIPTION = "Join multiple arguments to variadic argument method calls"
+    }
+
+    override fun applyFix(project: Project, descriptor: ProblemDescriptor) {
+        var outmostCallExpression = descriptor.startElement as? PsiMethodCallExpression ?: return
+
+        for (matcher in matchers) {
+            val assertThatMethodCall = outmostCallExpression.findStaticMethodCall() ?: return
+            val methodsToFix = assertThatMethodCall.gatherAssertionCalls()
+            val matchedCalls = methodsToFix.filter(matcher::test)
+            if (matchedCalls.size > 1) {
+                val mainCall = matchedCalls.first()
+                val args = mutableListOf(*mainCall.argumentList.expressions)
+                for (secondaryCall in matchedCalls.asSequence().drop(1)) {
+                    args.addAll(secondaryCall.argumentList.expressions)
+                }
+                val newMainCall = createExpectedMethodCall(mainCall, mainCall.methodExpression.qualifiedName, *args.toTypedArray())
+                newMainCall.replaceQualifierFromMethodCall(mainCall)
+                mainCall.replace(newMainCall)
+                for (secondaryCall in matchedCalls.asSequence().drop(1)) {
+                    val newQualifier = secondaryCall.qualifierExpression
+                    outmostCallExpression = secondaryCall.replace(newQualifier).findOutmostMethodCall() ?: return
+                }
+            }
+        }
+    }
+}

src/main/java/de/platon42/intellij/plugins/cajon/quickfixes/MoveOutMethodCallExpressionQuickFix.kt

@@ -2,6 +2,7 @@ package de.platon42.intellij.plugins.cajon.quickfixes
 
 import com.intellij.codeInspection.ProblemDescriptor
 import com.intellij.openapi.project.Project
+import com.intellij.psi.JavaPsiFacade
 import com.intellij.psi.PsiMethodCallExpression
 import de.platon42.intellij.plugins.cajon.*
 
@@ -9,7 +10,8 @@ class MoveOutMethodCallExpressionQuickFix(
     description: String,
     private val replacementMethod: String,
     private val useNullNonNull: Boolean = false,
-    private val noExpectedExpression: Boolean = false
+    private val noExpectedExpression: Boolean = false,
+    private val keepExpectedAsSecondArgument: Boolean = false
 ) :
     AbstractCommonQuickFix(description) {
 
@@ -27,6 +29,17 @@ class MoveOutMethodCallExpressionQuickFix(
         val assertExpression = assertThatMethodCall.firstArg as? PsiMethodCallExpression ?: return
         val assertExpressionArg = if (noExpectedExpression) null else assertExpression.getArgOrNull(0)?.copy()
 
+        if (keepExpectedAsSecondArgument) {
+            assertExpressionArg ?: return
+            val secondArg =
+                if (useNullNonNull) JavaPsiFacade.getElementFactory(project).createExpressionFromText("null", null) else outmostCallExpression.getArgOrNull(0)?.copy() ?: return
+
+            assertExpression.replace(assertExpression.qualifierExpression)
+
+            val expectedExpression = createExpectedMethodCall(outmostCallExpression, replacementMethod, assertExpressionArg, secondArg)
+            expectedExpression.replaceQualifierFromMethodCall(outmostCallExpression)
+            outmostCallExpression.replace(expectedExpression)
+        } else {
             val methodsToFix = assertThatMethodCall.collectMethodCallsUpToStatement()
                 .filter { (if (useNullNonNull) it.getExpectedNullNonNullResult() else it.getExpectedBooleanResult()) != null }
                 .toList()
@@ -40,4 +53,5 @@ class MoveOutMethodCallExpressionQuickFix(
                     it.replace(expectedExpression)
                 }
         }
+    }
 }

src/main/java/de/platon42/intellij/plugins/cajon/quickfixes/ReplaceHasSizeMethodCallQuickFix.kt

@@ -15,7 +15,7 @@ class ReplaceHasSizeMethodCallQuickFix(description: String, private val replacem
     override fun applyFix(project: Project, descriptor: ProblemDescriptor) {
         val methodCallExpression = descriptor.startElement as? PsiMethodCallExpression ?: return
 
-        replaceCollectionSizeOrArrayLength(methodCallExpression.firstArg)
+        replaceCollectionAndMapSizeOrArrayLength(methodCallExpression.firstArg)
 
         val expectedExpression = createExpectedMethodCall(methodCallExpression, replacementMethod, methodCallExpression.firstArg)
 
@@ -23,7 +23,7 @@ class ReplaceHasSizeMethodCallQuickFix(description: String, private val replacem
         methodCallExpression.replace(expectedExpression)
     }
 
-    private fun replaceCollectionSizeOrArrayLength(assertExpression: PsiExpression) {
+    private fun replaceCollectionAndMapSizeOrArrayLength(assertExpression: PsiExpression) {
         assertExpression.replace(
             when (assertExpression) {
                 is PsiReferenceExpression -> assertExpression.qualifierExpression!!

src/main/java/de/platon42/intellij/plugins/cajon/quickfixes/ReplaceSizeMethodCallQuickFix.kt

@@ -26,10 +26,10 @@ class ReplaceSizeMethodCallQuickFix(
         val outmostCallExpression = descriptor.startElement as? PsiMethodCallExpression ?: return
         val assertThatMethodCall = outmostCallExpression.findStaticMethodCall() ?: return
         val assertExpression = assertThatMethodCall.firstArg
-        replaceCollectionSizeOrArrayLength(assertExpression)
+        replaceCollectionAndMapSizeOrArrayLength(assertExpression)
 
         if (expectedIsCollection) {
-            replaceCollectionSizeOrArrayLength(outmostCallExpression.firstArg)
+            replaceCollectionAndMapSizeOrArrayLength(outmostCallExpression.firstArg)
         }
 
         val args = if (noExpectedExpression) emptyArray() else arrayOf(outmostCallExpression.firstArg)
@@ -39,7 +39,7 @@ class ReplaceSizeMethodCallQuickFix(
         outmostCallExpression.replace(expectedExpression)
     }
 
-    private fun replaceCollectionSizeOrArrayLength(assertExpression: PsiExpression) {
+    private fun replaceCollectionAndMapSizeOrArrayLength(assertExpression: PsiExpression) {
         assertExpression.replace(
             when (assertExpression) {
                 is PsiReferenceExpression -> assertExpression.qualifierExpression!!

src/main/java/de/platon42/intellij/plugins/cajon/references/ExtractorReferenceContributor.kt

@@ -7,6 +7,7 @@ import com.intellij.psi.*
 import com.intellij.psi.util.PropertyUtilBase
 import com.intellij.psi.util.PsiTreeUtil
 import com.intellij.psi.util.PsiTypesUtil
+import com.intellij.util.ArrayUtil
 import com.intellij.util.ProcessingContext
 import com.siyeh.ig.callMatcher.CallMatcher
 import de.platon42.intellij.plugins.cajon.*
@@ -70,6 +71,11 @@ class ExtractorReferenceContributor : PsiReferenceContributor() {
     class ExtractorReference(literal: PsiLiteralExpression, range: TextRange, private val targets: List<PsiElement>) :
         PsiPolyVariantReferenceBase<PsiLiteralExpression>(literal, range, true) {
 
+        // Do not remove due to compatiblity issue with IDEA <= 2018.2
+        override fun getVariants(): Array<Any> {
+            return ArrayUtil.EMPTY_OBJECT_ARRAY
+        }
+
         override fun resolve(): PsiElement? {
             return multiResolve(false).map(ResolveResult::getElement).firstOrNull()
         }

src/main/resources/META-INF/plugin.xml

@@ -1,7 +1,7 @@
 <idea-plugin>
     <id>de.platon42.cajon</id>
     <name>Concise AssertJ Optimizing Nitpicker (Cajon)</name>
-    <vendor email="chrisly@platon42.de" url="https://github.com/chrisly42/cajon-plugin">Platon42</vendor>
+    <vendor email="chrisly@platon42.de" url="https://github.com/chrisly42/cajon-plugin">Chris 'platon42' Hodges</vendor>
 
     <description><![CDATA[
     Cajon is an IntelliJ IDEA Plugin for shortening and optimizing AssertJ assertions.
@@ -48,6 +48,8 @@
 
         <localInspection groupPath="Java" shortName="JoinAssertThatStatements" enabledByDefault="true" level="WARNING"
                          implementationClass="de.platon42.intellij.plugins.cajon.inspections.JoinAssertThatStatementsInspection"/>
+        <localInspection groupPath="Java" shortName="JoinVarArgsContains" enabledByDefault="true" level="WARNING"
+                         implementationClass="de.platon42.intellij.plugins.cajon.inspections.JoinVarArgsContainsInspection"/>
         <localInspection groupPath="Java" shortName="AssumeThatInsteadOfReturn" enabledByDefault="true" level="WARNING"
                          implementationClass="de.platon42.intellij.plugins.cajon.inspections.AssumeThatInsteadOfReturnInspection"/>
 

src/main/resources/inspectionDescriptions/AssertThatCollectionOrMapExpression.html

@@ -1,8 +1,18 @@
 <html>
 <body>
-Turns assertThat(collectionOrMap.someMethod(arg)).isTrue/isFalse() into assertThat(collectionOrMap).someMethod(arg).
+Turns assertThat(collectionOrMap.someMethod(arg)).isTrue/isFalse() into assertThat(collectionOrMap).someMethod(arg) and
+assertThat(map.get(key)).isEqualTo/isNotEqualTo(value) into assertThat(map).containsEntry(key, value).
 <!-- tooltip end -->
 <br>someMethod() can be isEmpty(), contains(), and containsAll() for collections and
 isEmpty(), containsKey(), and containsValue() for maps.
+get() may be transformed into containsKey(), doesNotContainKey(), containsEntry() or doesNotContainEntry().
+<br>
+If you are using degenerated maps in your project that may contain null values (i.e.
+map.contains(key) == true AND map.get(key) == null
+is valid for some entries in your map), the default behavior of the quickfix
+assertThat(map.get(key)).isNull() turning into assertThat(map).doesNotContainKey(key)
+is not an equivalent transformation. The settings below can change this behavior to instead transform it into
+assertThat(map).containsEntry(key, null) for those cases, create both quickfix choices or simply ignore this
+case altogether (if in doubt).
 </body>
 </html>

src/main/resources/inspectionDescriptions/AssertThatSize.html

@@ -1,7 +1,7 @@
 <html>
 <body>
-Makes assertions on sizes of arrays, collections, strings, or CharSequences more concise by replacing them with isEmpty(), isNotEmpty(), hasSize(), or hasSameSizeAs().
+Makes assertions on sizes of arrays, collections, maps, strings, or CharSequences more concise by replacing them with isEmpty(), isNotEmpty(), hasSize(), or hasSameSizeAs().
 <!-- tooltip end -->
-<br>Several more conversions are available with AssertJ 13.2.0 or later.
+<br>Several more conversions are available with AssertJ 3.12.0 or later.
 </body>
 </html>

src/main/resources/inspectionDescriptions/JoinVarArgsContains.html

@@ -0,0 +1,11 @@
+<html>
+<body>
+Finds assertions where multiple .contains(), .containsOnlyOnce() or .doesNotContain() are
+used in a single statement that could be joined together.
+<!-- tooltip end -->
+Only works when variadic arguments are possible and will not be performed on more complex
+statements with .extracting() or .as() to avoid changing semantics.
+<br>
+Note that the quickfix does not handle comments very well and might remove them during the operation.
+</body>
+</html>

src/test/java/de/platon42/intellij/jupiter/LightCodeInsightExtension.java

@@ -11,7 +11,7 @@ import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.testFramework.*;
 import com.intellij.testFramework.fixtures.IdeaTestExecutionPolicy;
 import com.intellij.testFramework.fixtures.JavaCodeInsightTestFixture;
-import com.intellij.testFramework.fixtures.LightCodeInsightFixtureTestCase;
+import com.intellij.testFramework.fixtures.LightJavaCodeInsightFixtureTestCase;
 import org.jetbrains.annotations.NotNull;
 import org.junit.jupiter.api.extension.*;
 import org.junit.jupiter.api.extension.ExtensionContext.Namespace;
@@ -88,7 +88,6 @@ public class LightCodeInsightExtension implements ParameterResolver, AfterTestEx
                 TestLoggerFactory.onTestFinished(true);
             } catch (Throwable e) {
                 TestLoggerFactory.onTestFinished(false);
-                e.fillInStackTrace();
                 throwables[0] = e;
             }
         };
@@ -112,7 +111,7 @@ public class LightCodeInsightExtension implements ParameterResolver, AfterTestEx
         }
     }
 
-    private static class LightCodeInsightFixtureTestCaseWrapper extends LightCodeInsightFixtureTestCase {
+    private static class LightCodeInsightFixtureTestCaseWrapper extends LightJavaCodeInsightFixtureTestCase {
         private final ExtensionContext extensionContext;
 
         private LightCodeInsightFixtureTestCaseWrapper(ExtensionContext extensionContext) {
@@ -159,7 +158,7 @@ public class LightCodeInsightExtension implements ParameterResolver, AfterTestEx
             };
         }
 
-        protected void addJarContaining(ModifiableRootModel model, Class clazz) {
+        void addJarContaining(ModifiableRootModel model, Class clazz) {
             try {
                 Path jarPath = Paths.get(clazz.getProtectionDomain().getCodeSource().getLocation().toURI());
 

src/test/java/de/platon42/intellij/plugins/cajon/AbstractCajonTest.kt

@@ -1,5 +1,6 @@
 package de.platon42.intellij.plugins.cajon
 
+import com.intellij.codeInsight.intention.IntentionAction
 import com.intellij.pom.java.LanguageLevel
 import com.intellij.testFramework.fixtures.JavaCodeInsightTestFixture
 import de.platon42.intellij.jupiter.AddLocalJarToModule
@@ -21,10 +22,20 @@ import java.lang.reflect.Method
 abstract class AbstractCajonTest {
 
     protected fun executeQuickFixes(myFixture: JavaCodeInsightTestFixture, regex: Regex, expectedFixes: Int) {
+        val quickfixes = getQuickFixes(myFixture, regex, expectedFixes)
+        assertThat(quickfixes.groupBy { it.familyName }).hasSize(1)
+        quickfixes.forEach(myFixture::launchAction)
+    }
+
+    protected fun executeQuickFixesNoFamilyNameCheck(myFixture: JavaCodeInsightTestFixture, regex: Regex, expectedFixes: Int) {
+        val quickfixes = getQuickFixes(myFixture, regex, expectedFixes)
+        quickfixes.forEach(myFixture::launchAction)
+    }
+
+    protected fun getQuickFixes(myFixture: JavaCodeInsightTestFixture, regex: Regex, expectedFixes: Int): List<IntentionAction> {
         val quickfixes = myFixture.getAllQuickFixes().filter { it.text.matches(regex) }
         assertThat(quickfixes).`as`("Fixes matched by $regex: ${myFixture.getAllQuickFixes().map { it.text }}").hasSize(expectedFixes)
-        quickfixes.forEach { it.familyName }
+        return quickfixes
-        quickfixes.forEach(myFixture::launchAction)
     }
 
     class CutOffFixtureDisplayNameGenerator : DisplayNameGenerator.ReplaceUnderscores() {

src/test/java/de/platon42/intellij/plugins/cajon/inspections/AssertThatCollectionOrMapExpressionInspectionTest.kt

@@ -4,12 +4,13 @@ import com.intellij.testFramework.fixtures.JavaCodeInsightTestFixture
 import de.platon42.intellij.jupiter.MyFixture
 import de.platon42.intellij.jupiter.TestDataSubPath
 import de.platon42.intellij.plugins.cajon.AbstractCajonTest
+import org.assertj.core.api.Assertions.assertThat
 import org.junit.jupiter.api.Test
 
+@TestDataSubPath("inspections/CollectionMapExpression")
 internal class AssertThatCollectionOrMapExpressionInspectionTest : AbstractCajonTest() {
 
     @Test
-    @TestDataSubPath("inspections/CollectionMapExpression")
     internal fun assertThat_with_certain_Collection_and_Map_methods(@MyFixture myFixture: JavaCodeInsightTestFixture) {
         myFixture.enableInspections(AssertThatCollectionOrMapExpressionInspection::class.java)
         myFixture.configureByFile("CollectionMapExpressionBefore.java")
@@ -22,6 +23,82 @@ internal class AssertThatCollectionOrMapExpressionInspectionTest : AbstractCajon
         executeQuickFixes(myFixture, Regex.fromLiteral("Remove contains() of actual expression and use assertThat().doesNotContain() instead"), 2)
         executeQuickFixes(myFixture, Regex.fromLiteral("Remove containsKey() of actual expression and use assertThat().doesNotContainKey() instead"), 2)
         executeQuickFixes(myFixture, Regex.fromLiteral("Remove containsValue() of actual expression and use assertThat().doesNotContainValue() instead"), 2)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().containsEntry() instead"), 2)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().doesNotContainEntry() instead"), 2)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().containsKey() instead"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().doesNotContainKey() instead"), 4)
         myFixture.checkResultByFile("CollectionMapExpressionAfter.java")
     }
+
+    @Test
+    internal fun assertThat_with_certain_Collection_and_Map_methods_with_Null_values(@MyFixture myFixture: JavaCodeInsightTestFixture) {
+        val inspection = AssertThatCollectionOrMapExpressionInspection()
+        inspection.behaviorForMapValueEqualsNull = 3
+        myFixture.enableInspections(inspection)
+        myFixture.configureByFile("CollectionMapExpressionBefore.java")
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove isEmpty() of actual expression and use assertThat().isEmpty() instead"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove contains() of actual expression and use assertThat().contains() instead"), 2)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove containsAll() of actual expression and use assertThat().containsAll() instead"), 2)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove containsKey() of actual expression and use assertThat().containsKey() instead"), 2)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove containsValue() of actual expression and use assertThat().containsValue() instead"), 2)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove isEmpty() of actual expression and use assertThat().isNotEmpty() instead"), 5)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove contains() of actual expression and use assertThat().doesNotContain() instead"), 2)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove containsKey() of actual expression and use assertThat().doesNotContainKey() instead"), 2)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove containsValue() of actual expression and use assertThat().doesNotContainValue() instead"), 2)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().containsEntry() instead"), 6)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().doesNotContainEntry() instead"), 2)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().containsKey() instead"), 4)
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().doesNotContainKey() instead"), 0)
+        myFixture.checkResultByFile("CollectionMapExpressionWithNullValuesAfter.java")
+    }
+
+    @Test
+    internal fun assertThat_with_certain_Collection_and_Map_methods_with_no_quickfixes_for_get_equals_null(@MyFixture myFixture: JavaCodeInsightTestFixture) {
+        val inspection = AssertThatCollectionOrMapExpressionInspection()
+        inspection.behaviorForMapValueEqualsNull = 0
+
+        myFixture.enableInspections(inspection)
+        myFixture.configureByFile("CollectionMapExpressionBefore.java")
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().containsEntry() instead"), 2)
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().doesNotContainEntry() instead"), 2)
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().containsKey() instead"), 4)
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().doesNotContainKey() instead"), 0)
+    }
+
+    @Test
+    internal fun assertThat_with_certain_Collection_and_Map_methods_with_only_warnings_for_get_equals_null(@MyFixture myFixture: JavaCodeInsightTestFixture) {
+        val inspection = AssertThatCollectionOrMapExpressionInspection()
+        inspection.behaviorForMapValueEqualsNull = 1
+
+        myFixture.enableInspections(inspection)
+        myFixture.configureByFile("CollectionMapExpressionBefore.java")
+        val highlights = myFixture.doHighlighting()
+            .asSequence()
+            .filter { it.description == "Moving get() expression out of assertThat() would be more concise" }
+            .filter {
+                it.quickFixActionRanges?.any { innerit -> innerit.first.action.text.contains("Inspection 'Asserting a collection or map specific expression") } ?: true
+            }
+            .toList()
+        assertThat(highlights).hasSize(4)
+
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().containsEntry() instead"), 2)
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().doesNotContainEntry() instead"), 2)
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().containsKey() instead"), 4)
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().doesNotContainKey() instead"), 0)
+    }
+
+    @Test
+    internal fun assertThat_with_certain_Collection_and_Map_methods_with_both_quickfixes_for_get_equals_null(@MyFixture myFixture: JavaCodeInsightTestFixture) {
+        val inspection = AssertThatCollectionOrMapExpressionInspection()
+        inspection.behaviorForMapValueEqualsNull = 4
+
+        myFixture.enableInspections(inspection)
+        myFixture.configureByFile("CollectionMapExpressionBefore.java")
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().containsEntry() instead"), 2)
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().doesNotContainKey() instead (regular map)"), 4)
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().containsEntry(key, null) instead (degenerated map)"), 4)
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().doesNotContainEntry() instead"), 2)
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().containsKey() instead"), 4)
+        getQuickFixes(myFixture, Regex.fromLiteral("Remove get() of actual expression and use assertThat().doesNotContainKey() instead"), 0)
+    }
 }

src/test/java/de/platon42/intellij/plugins/cajon/inspections/AssertThatGuavaOptionalInspectionTest.kt

@@ -31,8 +31,8 @@ internal class AssertThatGuavaOptionalInspectionTest : AbstractCajonTest() {
     internal fun adds_missing_Guava_import_any_order(@MyFixture myFixture: JavaCodeInsightTestFixture) {
         myFixture.enableInspections(AssertThatGuavaOptionalInspection::class.java)
         myFixture.configureByFile("WithoutPriorGuavaImportBefore.java")
-        executeQuickFixes(myFixture, Regex(".*eplace .* with .*"), 4)
+        executeQuickFixesNoFamilyNameCheck(myFixture, Regex(".*eplace .* with .*"), 4)
-        executeQuickFixes(myFixture, Regex("Remove .*"), 3)
+        executeQuickFixesNoFamilyNameCheck(myFixture, Regex("Remove .*"), 3)
         myFixture.checkResultByFile("WithoutPriorGuavaImportAfter.java")
     }
 
@@ -41,8 +41,8 @@ internal class AssertThatGuavaOptionalInspectionTest : AbstractCajonTest() {
         myFixture.enableInspections(AssertThatGuavaOptionalInspection::class.java)
         myFixture.configureByFile("WithoutPriorGuavaImportBefore.java")
         executeQuickFixes(myFixture, Regex.fromLiteral("Replace isEqualTo() with Guava assertThat().isAbsent()"), 1)
-        executeQuickFixes(myFixture, Regex(".*eplace .* with .*"), 3)
+        executeQuickFixesNoFamilyNameCheck(myFixture, Regex(".*eplace .* with .*"), 3)
-        executeQuickFixes(myFixture, Regex("Remove .*"), 3)
+        executeQuickFixesNoFamilyNameCheck(myFixture, Regex("Remove .*"), 3)
         myFixture.checkResultByFile("WithoutPriorGuavaImportAfter.java")
     }
 }

src/test/java/de/platon42/intellij/plugins/cajon/inspections/AssertThatSizeInspectionTest.kt

@@ -12,25 +12,25 @@ internal class AssertThatSizeInspectionTest : AbstractCajonTest() {
 
     @Test
     @TestDataSubPath("inspections/Size")
-    internal fun assertThat_size_of_array_or_collection_can_be_simplified(@MyFixture myFixture: JavaCodeInsightTestFixture) {
+    internal fun assertThat_size_of_array_collection_or_map_can_be_simplified(@MyFixture myFixture: JavaCodeInsightTestFixture) {
         myFixture.enableInspections(AssertThatSizeInspection::class.java)
         myFixture.configureByFile("SizeBefore.java")
         assertThat(myFixture.doHighlighting()).extrakting { it.description }.containsOnlyOnce("Try to operate on the iterable itself rather than its size")
 
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isEqualTo() with isEmpty()"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isEqualTo() with isEmpty()"), 5)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isZero() with isEmpty()"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isZero() with isEmpty()"), 5)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isNotZero() with isNotEmpty()"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isNotZero() with isNotEmpty()"), 5)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isGreaterThan() with isNotEmpty()"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isGreaterThan() with isNotEmpty()"), 5)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isGreaterThanOrEqualTo() with isNotEmpty()"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isGreaterThanOrEqualTo() with isNotEmpty()"), 5)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isLessThan() with isEmpty()"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isLessThan() with isEmpty()"), 5)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isLessThanOrEqualTo() with isEmpty()"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isLessThanOrEqualTo() with isEmpty()"), 5)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isEqualTo() with hasSameSizeAs()"), 12)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isEqualTo() with hasSameSizeAs()"), 15)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isEqualTo() with hasSize()"), 8)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isEqualTo() with hasSize()"), 15)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isGreaterThan() with hasSizeGreaterThan()"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isGreaterThan() with hasSizeGreaterThan()"), 5)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isGreaterThanOrEqualTo() with hasSizeGreaterThanOrEqualTo()"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isGreaterThanOrEqualTo() with hasSizeGreaterThanOrEqualTo()"), 5)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isLessThan() with hasSizeLessThan()"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isLessThan() with hasSizeLessThan()"), 5)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isLessThanOrEqualTo() with hasSizeLessThanOrEqualTo()"), 4)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace isLessThanOrEqualTo() with hasSizeLessThanOrEqualTo()"), 5)
-        executeQuickFixes(myFixture, Regex.fromLiteral("Remove size determination of expected expression and replace hasSize() with hasSameSizeAs()"), 14)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Remove size determination of expected expression and replace hasSize() with hasSameSizeAs()"), 17)
         myFixture.checkResultByFile("SizeAfter.java")
     }
 }

src/test/java/de/platon42/intellij/plugins/cajon/inspections/ImplicitAssertionInspectionTest.kt

@@ -16,9 +16,9 @@ internal class ImplicitAssertionInspectionTest : AbstractCajonTest() {
     internal fun implicit_assertions_can_be_removed(@MyFixture myFixture: JavaCodeInsightTestFixture) {
         myFixture.enableInspections(ImplicitAssertionInspection::class.java)
         myFixture.configureByFile("ImplicitAssertionBefore.java")
-        executeQuickFixes(myFixture, Regex("Delete implicit isNotNull\\(\\) covered by .*"), 101)
+        executeQuickFixesNoFamilyNameCheck(myFixture, Regex("Delete implicit isNotNull\\(\\) covered by .*"), 101)
-        executeQuickFixes(myFixture, Regex("Delete implicit isNotEmpty\\(\\) covered by .*"), 17)
+        executeQuickFixesNoFamilyNameCheck(myFixture, Regex("Delete implicit isNotEmpty\\(\\) covered by .*"), 17)
-        executeQuickFixes(myFixture, Regex("Delete implicit isPresent\\(\\) covered by .*"), 8)
+        executeQuickFixesNoFamilyNameCheck(myFixture, Regex("Delete implicit isPresent\\(\\) covered by .*"), 8)
         myFixture.checkResultByFile("ImplicitAssertionAfter.java")
     }
 }

src/test/java/de/platon42/intellij/plugins/cajon/inspections/JUnitAssertToAssertJInspectionTest.kt

@@ -17,8 +17,8 @@ internal class JUnitAssertToAssertJInspectionTest : AbstractCajonTest() {
     internal fun junit_Assertions_can_be_converted_into_AssertJ(@MyFixture myFixture: JavaCodeInsightTestFixture) {
         myFixture.enableInspections(JUnitAssertToAssertJInspection::class.java)
         myFixture.configureByFile("JUnitAssertToAssertJInspectionBefore.java")
-        executeQuickFixes(myFixture, Regex("Convert assert.*\\(\\) to assertThat\\(\\).*"), 48)
+        executeQuickFixesNoFamilyNameCheck(myFixture, Regex("Convert assert.*\\(\\) to assertThat\\(\\).*"), 48)
-        executeQuickFixes(myFixture, Regex("Convert assume.*\\(\\) to assumeThat\\(\\).*"), 7)
+        executeQuickFixesNoFamilyNameCheck(myFixture, Regex("Convert assume.*\\(\\) to assumeThat\\(\\).*"), 7)
         myFixture.checkResultByFile("JUnitAssertToAssertJInspectionAfter.java")
     }
 }

src/test/java/de/platon42/intellij/plugins/cajon/inspections/JoinVarArgsContainsInspectionTest.kt

@@ -0,0 +1,19 @@
+package de.platon42.intellij.plugins.cajon.inspections
+
+import com.intellij.testFramework.fixtures.JavaCodeInsightTestFixture
+import de.platon42.intellij.jupiter.MyFixture
+import de.platon42.intellij.jupiter.TestDataSubPath
+import de.platon42.intellij.plugins.cajon.AbstractCajonTest
+import org.junit.jupiter.api.Test
+
+internal class JoinVarArgsContainsInspectionTest : AbstractCajonTest() {
+
+    @Test
+    @TestDataSubPath("inspections/JoinVarArgsContains")
+    internal fun join_contains_and_doesNotContain_together_where_possible(@MyFixture myFixture: JavaCodeInsightTestFixture) {
+        myFixture.enableInspections(JoinVarArgsContainsInspection::class.java)
+        myFixture.configureByFile("JoinVarArgsContainsBefore.java")
+        executeQuickFixes(myFixture, Regex.fromLiteral("Join multiple arguments to variadic argument method calls"), 3)
+        myFixture.checkResultByFile("JoinVarArgsContainsAfter.java")
+    }
+}

src/test/resources/inspections/BinaryExpression/BinaryExpressionAfter.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class BinaryExpression {
 
@@ -196,7 +197,7 @@ public class BinaryExpression {
 
         assertThat(numberObjAct.equals(numberObjExp)).as("doh!").isTrue().isEqualTo(true);
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(stringAct, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/BinaryExpression/BinaryExpressionBefore.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class BinaryExpression {
 
@@ -196,7 +197,7 @@ public class BinaryExpression {
 
         assertThat(numberObjAct.equals(numberObjExp)).as("doh!").isTrue().isEqualTo(true);
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(stringAct, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/BooleanCondition/BooleanConditionAfter.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class BooleanCondition {
 
@@ -32,7 +33,7 @@ public class BooleanCondition {
         assertThat(primitive).isTrue().as("foo").isTrue().as("bar").isTrue().isFalse();
 
         assertThat(object).isEqualTo(Boolean.TYPE);
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(object, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/BooleanCondition/BooleanConditionBefore.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class BooleanCondition {
 
@@ -32,7 +33,7 @@ public class BooleanCondition {
         assertThat(primitive).isEqualTo(Boolean.TRUE).as("foo").isEqualTo(true).as("bar").isTrue().isFalse();
 
         assertThat(object).isEqualTo(Boolean.TYPE);
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(object, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/CollectionMapExpression/CollectionMapExpressionAfter.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 import java.util.*;
 
@@ -37,11 +38,26 @@ public class CollectionMapExpression {
         assertThat(keyValueMap).doesNotContainValue(2);
         assertThat(keyValueMap).doesNotContainValue(2);
 
+        assertThat(keyValueMap).containsEntry("foo", 2);
+        assertThat(keyValueMap).doesNotContainEntry("foo", 3);
+        assertThat(keyValueMap).doesNotContainKey("foo");
+        assertThat(keyValueMap).doesNotContainKey("foo");
+        assertThat(keyValueMap).containsKey("foo");
+        assertThat(keyValueMap).containsKey("foo");
+
+        Map<String, String> stringStringMap = new HashMap<>();
+        assertThat(stringStringMap).containsEntry("foo", "bar");
+        assertThat(stringStringMap).doesNotContainEntry("foo", "bar");
+        assertThat(stringStringMap).doesNotContainKey("foo");
+        assertThat(stringStringMap).doesNotContainKey("foo");
+        assertThat(stringStringMap).containsKey("foo");
+        assertThat(stringStringMap).containsKey("foo");
+
         assertThat(stringList).as("foo").isNotEmpty().as("bar").isNotEmpty();
         assertThat(stringList.isEmpty()).as("foo").isEqualTo(false).as("bar").isTrue();
         assertThat(stringList.isEmpty()).as("foo").satisfies(it -> it.booleanValue()).as("bar").isFalse();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(stringList, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/CollectionMapExpression/CollectionMapExpressionBefore.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 import java.util.*;
 
@@ -37,11 +38,26 @@ public class CollectionMapExpression {
         assertThat(keyValueMap.containsValue(2)).isEqualTo(false);
         assertThat(keyValueMap.containsValue(2)).isFalse();
 
+        assertThat(keyValueMap.get("foo")).isEqualTo(2);
+        assertThat(keyValueMap.get("foo")).isNotEqualTo(3);
+        assertThat(keyValueMap.get("foo")).isEqualTo(null);
+        assertThat(keyValueMap.get("foo")).isNull();
+        assertThat(keyValueMap.get("foo")).isNotEqualTo(null);
+        assertThat(keyValueMap.get("foo")).isNotNull();
+
+        Map<String, String> stringStringMap = new HashMap<>();
+        assertThat(stringStringMap.get("foo")).isEqualTo("bar");
+        assertThat(stringStringMap.get("foo")).isNotEqualTo("bar");
+        assertThat(stringStringMap.get("foo")).isEqualTo(null);
+        assertThat(stringStringMap.get("foo")).isNull();
+        assertThat(stringStringMap.get("foo")).isNotEqualTo(null);
+        assertThat(stringStringMap.get("foo")).isNotNull();
+
         assertThat(stringList.isEmpty()).as("foo").isEqualTo(false).as("bar").isFalse();
         assertThat(stringList.isEmpty()).as("foo").isEqualTo(false).as("bar").isTrue();
         assertThat(stringList.isEmpty()).as("foo").satisfies(it -> it.booleanValue()).as("bar").isFalse();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(stringList, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/CollectionMapExpression/CollectionMapExpressionWithNullValuesAfter.java

@@ -0,0 +1,63 @@
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
+
+import java.util.*;
+
+public class CollectionMapExpression {
+
+    private void collectionMapExpression() {
+        List<String> stringList = new ArrayList<>();
+        List<String> anotherList = new ArrayList<>();
+        Map<String, Integer> keyValueMap = new HashMap<>();
+
+        assertThat(stringList).as("foo").isEmpty();
+        assertThat(stringList).isEmpty();
+        assertThat(stringList).contains("foo");
+        assertThat(stringList).contains("foo");
+        assertThat(stringList).containsAll(anotherList);
+        assertThat(stringList).containsAll(anotherList);
+
+        assertThat(stringList).as("foo").isNotEmpty();
+        assertThat(stringList).isNotEmpty();
+        assertThat(stringList).doesNotContain("foo");
+        assertThat(stringList).doesNotContain("foo");
+        assertThat(stringList.containsAll(anotherList)).isEqualTo(false);
+        assertThat(stringList.containsAll(anotherList)).isFalse();
+
+        assertThat(keyValueMap).as("foo").isEmpty();
+        assertThat(keyValueMap).isEmpty();
+        assertThat(keyValueMap).containsKey("foo");
+        assertThat(keyValueMap).containsKey("foo");
+        assertThat(keyValueMap).containsValue(2);
+        assertThat(keyValueMap).containsValue(2);
+
+        assertThat(keyValueMap).as("foo").isNotEmpty();
+        assertThat(keyValueMap).isNotEmpty();
+        assertThat(keyValueMap).doesNotContainKey("foo");
+        assertThat(keyValueMap).doesNotContainKey("foo");
+        assertThat(keyValueMap).doesNotContainValue(2);
+        assertThat(keyValueMap).doesNotContainValue(2);
+
+        assertThat(keyValueMap).containsEntry("foo", 2);
+        assertThat(keyValueMap).doesNotContainEntry("foo", 3);
+        assertThat(keyValueMap).containsEntry("foo", null);
+        assertThat(keyValueMap).containsEntry("foo", null);
+        assertThat(keyValueMap).containsKey("foo");
+        assertThat(keyValueMap).containsKey("foo");
+
+        Map<String, String> stringStringMap = new HashMap<>();
+        assertThat(stringStringMap).containsEntry("foo", "bar");
+        assertThat(stringStringMap).doesNotContainEntry("foo", "bar");
+        assertThat(stringStringMap).containsEntry("foo", null);
+        assertThat(stringStringMap).containsEntry("foo", null);
+        assertThat(stringStringMap).containsKey("foo");
+        assertThat(stringStringMap).containsKey("foo");
+
+        assertThat(stringList).as("foo").isNotEmpty().as("bar").isNotEmpty();
+        assertThat(stringList.isEmpty()).as("foo").isEqualTo(false).as("bar").isTrue();
+        assertThat(stringList.isEmpty()).as("foo").satisfies(it -> it.booleanValue()).as("bar").isFalse();
+
+        org.junit.Assert.assertThat(stringList, null);
+        fail("oh no!");
+    }
+}

src/test/resources/inspections/EnumerableIsEmpty/EnumerableIsEmptyAfter.java

@@ -1,6 +1,7 @@
 import java.util.ArrayList;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class EnumerableIsEmpty {
 
@@ -17,7 +18,7 @@ public class EnumerableIsEmpty {
 
         assertThat("string").as("foo").hasSize(0).hasSameSizeAs("foo").isEmpty();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat("foo", null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/EnumerableIsEmpty/EnumerableIsEmptyBefore.java

@@ -1,6 +1,7 @@
 import java.util.ArrayList;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class EnumerableIsEmpty {
 
@@ -17,7 +18,7 @@ public class EnumerableIsEmpty {
 
         assertThat("string").as("foo").hasSize(0).hasSameSizeAs("foo").hasSize(0);
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat("foo", null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/GuavaOptional/GuavaOptionalAfter.java

@@ -1,6 +1,7 @@
 import com.google.common.base.Optional;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 import static org.assertj.guava.api.Assertions.assertThat;
 
 public class GuavaOptional {
@@ -30,8 +31,21 @@ public class GuavaOptional {
         assertThat(opt).isPresent();
         assertThat(opt).isPresent();
 
+        //assertThat(opt.get()).isEqualTo(opt.get()); // there's a better version than contains(opt.get())
+        assertThat(opt.orNull()).isEqualTo(opt.get());
+        //assertThat(opt.get()).isEqualTo(opt.orNull()); // there's a better version than contains(opt.orNull())
+
+        assertThat(opt).contains(opt.get());
+        assertThat(opt).contains(opt.orNull());
+
+        String possibleNullString = System.getProperty("username");
+        String notNullString = "Narf";
+
         assertThat(opt).as("foo").contains("foo");
         assertThat(opt).contains("foo");
+        assertThat(opt).isEqualTo(Optional.fromNullable(null));
+        assertThat(opt).isEqualTo(Optional.fromNullable(possibleNullString));
+        assertThat(opt).isEqualTo(Optional.fromNullable(notNullString));
         assertThat(opt).isNotEqualTo(Optional.of("foo"));
         assertThat(opt).isNotEqualTo(Optional.fromNullable("foo"));
 
@@ -59,7 +73,7 @@ public class GuavaOptional {
 
         assertThat(opt.orNull()).as("foo").isEqualTo(null).isNotNull();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(opt, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/GuavaOptional/GuavaOptionalBefore.java

@@ -1,6 +1,7 @@
 import com.google.common.base.Optional;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 import static org.assertj.guava.api.Assertions.assertThat;
 
 public class GuavaOptional {
@@ -30,8 +31,21 @@ public class GuavaOptional {
         assertThat(opt.orNull()).isNotEqualTo(null);
         assertThat(opt.orNull()).isNotNull();
 
+        //assertThat(opt.get()).isEqualTo(opt.get()); // there's a better version than contains(opt.get())
+        assertThat(opt.orNull()).isEqualTo(opt.get());
+        //assertThat(opt.get()).isEqualTo(opt.orNull()); // there's a better version than contains(opt.orNull())
+
+        assertThat(opt).contains(opt.get());
+        assertThat(opt).contains(opt.orNull());
+
+        String possibleNullString = System.getProperty("username");
+        String notNullString = "Narf";
+
         assertThat(opt).as("foo").isEqualTo(Optional.of("foo"));
         assertThat(opt).isEqualTo(Optional.fromNullable("foo"));
+        assertThat(opt).isEqualTo(Optional.fromNullable(null));
+        assertThat(opt).isEqualTo(Optional.fromNullable(possibleNullString));
+        assertThat(opt).isEqualTo(Optional.fromNullable(notNullString));
         assertThat(opt).isNotEqualTo(Optional.of("foo"));
         assertThat(opt).isNotEqualTo(Optional.fromNullable("foo"));
 
@@ -59,7 +73,7 @@ public class GuavaOptional {
 
         assertThat(opt.orNull()).as("foo").isEqualTo(null).isNotNull();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(opt, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/ImplicitAssertion/ImplicitAssertionAfter.java

@@ -6,6 +6,7 @@ import java.util.Optional;
 import java.util.function.Consumer;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 import static org.assertj.guava.api.Assertions.assertThat;
 
 public class ImplicitAssertion {
@@ -285,7 +286,7 @@ public class ImplicitAssertion {
         assertThat(guavaOptional).extractingValue().isEqualTo("foo");
         assertThat(guavaOptional).extractingCharSequence().isEqualTo("foo");
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(string, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/ImplicitAssertion/ImplicitAssertionBefore.java

@@ -6,6 +6,7 @@ import java.util.Optional;
 import java.util.function.Consumer;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 import static org.assertj.guava.api.Assertions.assertThat;
 
 public class ImplicitAssertion {
@@ -285,7 +286,7 @@ public class ImplicitAssertion {
         assertThat(guavaOptional).isPresent().extractingValue().isEqualTo("foo");
         assertThat(guavaOptional).isPresent().extractingCharSequence().isEqualTo("foo");
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(string, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/InstanceOf/InstanceOfAfter.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class InstanceOf {
 
@@ -22,7 +23,7 @@ public class InstanceOf {
         assertThat(object).as("foo").isInstanceOf(Boolean.class).as("bar").isInstanceOf(Boolean.class);
         assertThat(object instanceof Boolean).as("foo").isEqualTo(Boolean.TRUE).as("bar").isEqualTo(false);
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(object, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/InstanceOf/InstanceOfBefore.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class InstanceOf {
 
@@ -22,7 +23,7 @@ public class InstanceOf {
         assertThat(object instanceof Boolean).as("foo").isEqualTo(Boolean.TRUE).as("bar").isEqualTo(true);
         assertThat(object instanceof Boolean).as("foo").isEqualTo(Boolean.TRUE).as("bar").isEqualTo(false);
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(object, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/InvertedBooleanCondition/InvertedBooleanConditionAfter.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class InvertedBooleanCondition {
 
@@ -36,7 +37,7 @@ public class InvertedBooleanCondition {
         assertThat(primitive).as("foo").isFalse().as("bar").isFalse();
         assertThat(primitive).as("foo").isFalse().as("bar").isTrue();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(object, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/InvertedBooleanCondition/InvertedBooleanConditionBefore.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class InvertedBooleanCondition {
 
@@ -36,7 +37,7 @@ public class InvertedBooleanCondition {
         assertThat(!primitive).as("foo").isEqualTo(Boolean.TRUE).as("bar").isNotEqualTo(false);
         assertThat(!primitive).as("foo").isEqualTo(Boolean.TRUE).as("bar").isNotEqualTo(true);
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(object, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/Java8Optional/Java8OptionalAfter.java

@@ -1,6 +1,7 @@
 import java.util.Optional;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class Java8Optional {
 
@@ -29,8 +30,21 @@ public class Java8Optional {
         assertThat(opt).isPresent();
         assertThat(opt).isPresent();
 
+        //assertThat(opt.get()).isEqualTo(opt.get()); // there's a better version than contains(opt.get())
+        assertThat(opt.orElse(null)).isEqualTo(opt.get());
+        //assertThat(opt.get()).isEqualTo(opt.orElse(null)); // there's a better version than contains(opt.orElse(null))
+
+        assertThat(opt).contains(opt.get());
+        assertThat(opt).contains(opt.orElse(null));
+
+        String possibleNullString = System.getProperty("username");
+        String notNullString = "Narf";
+
         assertThat(opt).as("foo").contains("foo");
         assertThat(opt).contains("foo");
+        assertThat(opt).isEqualTo(Optional.ofNullable(null));
+        assertThat(opt).isEqualTo(Optional.ofNullable(possibleNullString));
+        assertThat(opt).isEqualTo(Optional.ofNullable(notNullString));
         assertThat(opt).isNotEqualTo(Optional.of("foo"));
         assertThat(opt).isNotEqualTo(Optional.ofNullable("foo"));
 
@@ -46,7 +60,7 @@ public class Java8Optional {
 
         assertThat(opt.orElse(null)).as("foo").isEqualTo(null).isNotNull();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(opt, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/Java8Optional/Java8OptionalBefore.java

@@ -1,6 +1,7 @@
 import java.util.Optional;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class Java8Optional {
 
@@ -29,8 +30,21 @@ public class Java8Optional {
         assertThat(opt.orElse(null)).isNotEqualTo(null);
         assertThat(opt.orElse(null)).isNotNull();
 
+        //assertThat(opt.get()).isEqualTo(opt.get()); // there's a better version than contains(opt.get())
+        assertThat(opt.orElse(null)).isEqualTo(opt.get());
+        //assertThat(opt.get()).isEqualTo(opt.orElse(null)); // there's a better version than contains(opt.orElse(null))
+
+        assertThat(opt).contains(opt.get());
+        assertThat(opt).contains(opt.orElse(null));
+
+        String possibleNullString = System.getProperty("username");
+        String notNullString = "Narf";
+
         assertThat(opt).as("foo").isEqualTo(Optional.of("foo"));
         assertThat(opt).isEqualTo(Optional.ofNullable("foo"));
+        assertThat(opt).isEqualTo(Optional.ofNullable(null));
+        assertThat(opt).isEqualTo(Optional.ofNullable(possibleNullString));
+        assertThat(opt).isEqualTo(Optional.ofNullable(notNullString));
         assertThat(opt).isNotEqualTo(Optional.of("foo"));
         assertThat(opt).isNotEqualTo(Optional.ofNullable("foo"));
 
@@ -46,7 +60,7 @@ public class Java8Optional {
 
         assertThat(opt.orElse(null)).as("foo").isEqualTo(null).isNotNull();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(opt, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/JoinStatements/JoinStatementsAfter.java

@@ -66,7 +66,7 @@ public class JoinStatements {
         assertThat(list.get(--i)).isEqualTo("foo");
         assertThat(list.get(--i)).isEqualTo("foo");
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(list, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/JoinStatements/JoinStatementsBefore.java

@@ -63,7 +63,7 @@ public class JoinStatements {
         assertThat(list.get(--i)).isEqualTo("foo");
         assertThat(list.get(--i)).isEqualTo("foo");
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(list, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/JoinVarArgsContains/JoinVarArgsContainsAfter.java

@@ -0,0 +1,22 @@
+import java.util.*;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
+
+public class JoinVarArgsContains {
+
+    private void joinVarArgsContains() {
+        List<String> list = new ArrayList<>();
+
+        assertThat(list).contains("foo", "bar", "etc").hasSize(2);
+        assertThat(list).contains("foo").as("narf").contains("bar");
+        assertThat(list).doesNotContain("foo", "bar");
+        assertThat(list).containsOnlyOnce("foo", "etc") // will we lose this comment?
+                .hasSize(2).contains("bar", "narf", "1", "2", "3").doesNotContain("puit", "Jens Stoltenberg is a war-monger", "and an atomic playboy") /* inline */; // the final comment
+
+        assertThat(list).contains("foo").doesNotContain("bar").containsOnlyOnce("narf");
+
+        org.junit.Assert.assertThat(list, null);
+        fail("oh no!");
+    }
+}

src/test/resources/inspections/JoinVarArgsContains/JoinVarArgsContainsBefore.java

@@ -0,0 +1,28 @@
+import java.util.*;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
+
+public class JoinVarArgsContains {
+
+    private void joinVarArgsContains() {
+        List<String> list = new ArrayList<>();
+
+        assertThat(list).contains("foo").contains(/* foo */ "bar" /* bar */).hasSize(2).contains("etc");
+        assertThat(list).contains("foo").as("narf").contains("bar");
+        assertThat(list).doesNotContain("foo").doesNotContain("bar");
+        assertThat(list).containsOnlyOnce()
+                .containsOnlyOnce("foo") // will we lose this comment?
+                .hasSize(2) // this is part of the contains("bar")
+                .contains("bar").containsOnlyOnce("etc") /* where does this go? */
+                .contains("narf") // what about this one?
+                .doesNotContain("puit", "Jens Stoltenberg is a war-monger")
+                .doesNotContain("and an atomic playboy")
+                .contains("1", "2", "3") /* inline */; // the final comment
+
+        assertThat(list).contains("foo").doesNotContain("bar").containsOnlyOnce("narf");
+
+        org.junit.Assert.assertThat(list, null);
+        fail("oh no!");
+    }
+}

src/test/resources/inspections/ObjectExpression/ObjectExpressionAfter.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class ObjectExpression {
 

src/test/resources/inspections/ObjectExpression/ObjectExpressionBefore.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class ObjectExpression {
 

src/test/resources/inspections/ObjectIsNullOrNotNull/ObjectIsNullOrNotNullAfter.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class ObjectIsNull {
 
@@ -14,7 +15,7 @@ public class ObjectIsNull {
         assertThat(new Object()).as("foo").isNotNull().as("bar").isEqualTo(new Object()).as("etc").isNull();
         assertThat(new Object()).as("foo").isEqualTo(null).as("bar").isEqualTo(new Object()).as("etc").isNotNull();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat("foo", null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/ObjectIsNullOrNotNull/ObjectIsNullOrNotNullBefore.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class ObjectIsNull {
 
@@ -14,7 +15,7 @@ public class ObjectIsNull {
         assertThat(new Object()).as("foo").isNotEqualTo(null).as("bar").isEqualTo(new Object()).as("etc").isEqualTo(null);
         assertThat(new Object()).as("foo").isEqualTo(null).as("bar").isEqualTo(new Object()).as("etc").isNotEqualTo(null);
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat("foo", null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/Size/SizeAfter.java

@@ -1,6 +1,9 @@
 import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class Size {
 
@@ -11,6 +14,8 @@ public class Size {
         long[] otherArray = new long[4];
         String string = "string";
         StringBuilder stringBuilder = new StringBuilder();
+        Map<String, Integer> map = new HashMap<>();
+        Map<String, Integer> otherMap = new HashMap<>();
 
         assertThat(list).isEmpty();
         assertThat(list).isEmpty();
@@ -21,8 +26,9 @@ public class Size {
         assertThat(list).isEmpty();
         assertThat(list).hasSameSizeAs(otherList);
         assertThat(list).hasSameSizeAs(array);
-        assertThat(list).hasSize(string.length());
+        assertThat(list).hasSize(string.length()); // does currently not support hasSameSizeAs() in assertj
-        assertThat(list).hasSize(stringBuilder.length());
+        assertThat(list).hasSize(stringBuilder.length()); // does currently not support hasSameSizeAs() in assertj
+        assertThat(list).hasSize(map.size()); // does currently not support hasSameSizeAs() in assertj
         assertThat(list).hasSize(1);
         assertThat(list).hasSizeGreaterThan(otherList.size() * 2);
         assertThat(list).hasSizeGreaterThanOrEqualTo(otherList.size() * 2);
@@ -30,8 +36,9 @@ public class Size {
         assertThat(list).hasSizeLessThanOrEqualTo(otherList.size() * 2);
         assertThat(list).hasSameSizeAs(otherList);
         assertThat(list).hasSameSizeAs(array);
-        assertThat(list).hasSize(string.length());
+        assertThat(list).hasSize(string.length()); // currently unsupported in assertj
-        assertThat(list).hasSize(stringBuilder.length());
+        assertThat(list).hasSize(stringBuilder.length()); // currently unsupported in assertj
+        assertThat(list).hasSize(map.size()); // currently unsupported in assertj
 
         assertThat(array).isEmpty();
         assertThat(array).isEmpty();
@@ -42,8 +49,9 @@ public class Size {
         assertThat(array).isEmpty();
         assertThat(array).hasSameSizeAs(list);
         assertThat(array).hasSameSizeAs(otherArray);
-        assertThat(array).hasSize(string.length());
+        assertThat(array).hasSize(string.length()); // does currently not support hasSameSizeAs() in assertj
-        assertThat(array).hasSize(stringBuilder.length());
+        assertThat(array).hasSize(stringBuilder.length()); // does currently not support hasSameSizeAs() in assertj
+        assertThat(array).hasSize(map.size()); // does currently not support hasSameSizeAs() in assertj
         assertThat(array).hasSize(1);
         assertThat(array).hasSizeGreaterThan(otherArray.length - 1);
         assertThat(array).hasSizeGreaterThanOrEqualTo(otherArray.length + 1);
@@ -51,8 +59,9 @@ public class Size {
         assertThat(array).hasSizeLessThanOrEqualTo(1 - otherArray.length);
         assertThat(array).hasSameSizeAs(list);
         assertThat(array).hasSameSizeAs(otherArray);
-        assertThat(array).hasSize(string.length());
+        assertThat(array).hasSize(string.length()); // currently unsupported in assertj
-        assertThat(array).hasSize(stringBuilder.length());
+        assertThat(array).hasSize(stringBuilder.length()); // currently unsupported in assertj
+        assertThat(array).hasSize(map.size()); // currently unsupported in assertj
 
         assertThat(string).isEmpty();
         assertThat(string).isEmpty();
@@ -62,18 +71,20 @@ public class Size {
         assertThat(string).isEmpty();
         assertThat(string).isEmpty();
         assertThat(string).hasSameSizeAs(list);
-        assertThat(string).hasSameSizeAs(otherArray);
-        assertThat(string).hasSameSizeAs(string);
-        assertThat(string).hasSameSizeAs(stringBuilder);
-        assertThat(string).hasSize(1);
-        assertThat(string).hasSizeGreaterThan(otherArray.length - 1);
-        assertThat(string).hasSizeGreaterThanOrEqualTo(otherArray.length + 1);
-        assertThat(string).hasSizeLessThan(otherArray.length - 3);
-        assertThat(string).hasSizeLessThanOrEqualTo(1 - otherArray.length);
-        assertThat(string).hasSameSizeAs(otherList);
         assertThat(string).hasSameSizeAs(array);
         assertThat(string).hasSameSizeAs(string);
         assertThat(string).hasSameSizeAs(stringBuilder);
+        assertThat(string).hasSize(map.size()); // currently unsupported in assertj
+        assertThat(string).hasSize(1);
+        assertThat(string).hasSizeGreaterThan(array.length - 1);
+        assertThat(string).hasSizeGreaterThanOrEqualTo(array.length + 1);
+        assertThat(string).hasSizeLessThan(array.length - 3);
+        assertThat(string).hasSizeLessThanOrEqualTo(1 - array.length);
+        assertThat(string).hasSameSizeAs(list);
+        assertThat(string).hasSameSizeAs(array);
+        assertThat(string).hasSameSizeAs(string);
+        assertThat(string).hasSameSizeAs(stringBuilder);
+        assertThat(string).hasSize(map.size()); // currently unsupported in assertj
 
         assertThat(stringBuilder).isEmpty();
         assertThat(stringBuilder).isEmpty();
@@ -83,18 +94,43 @@ public class Size {
         assertThat(stringBuilder).isEmpty();
         assertThat(stringBuilder).isEmpty();
         assertThat(stringBuilder).hasSameSizeAs(list);
-        assertThat(stringBuilder).hasSameSizeAs(otherArray);
-        assertThat(stringBuilder).hasSameSizeAs(string);
-        assertThat(stringBuilder).hasSameSizeAs(stringBuilder);
-        assertThat(stringBuilder).hasSize(1);
-        assertThat(stringBuilder).hasSizeGreaterThan(otherArray.length - 1);
-        assertThat(stringBuilder).hasSizeGreaterThanOrEqualTo(otherArray.length + 1);
-        assertThat(stringBuilder).hasSizeLessThan(otherArray.length - 3);
-        assertThat(stringBuilder).hasSizeLessThanOrEqualTo(1 - otherArray.length);
-        assertThat(stringBuilder).hasSameSizeAs(otherList);
         assertThat(stringBuilder).hasSameSizeAs(array);
         assertThat(stringBuilder).hasSameSizeAs(string);
         assertThat(stringBuilder).hasSameSizeAs(stringBuilder);
+        assertThat(stringBuilder).hasSize(map.size()); // does currently not support hasSameSizeAs() in assertj
+        assertThat(stringBuilder).hasSize(1);
+        assertThat(stringBuilder).hasSizeGreaterThan(array.length - 1);
+        assertThat(stringBuilder).hasSizeGreaterThanOrEqualTo(array.length + 1);
+        assertThat(stringBuilder).hasSizeLessThan(array.length - 3);
+        assertThat(stringBuilder).hasSizeLessThanOrEqualTo(1 - array.length);
+        assertThat(stringBuilder).hasSameSizeAs(list);
+        assertThat(stringBuilder).hasSameSizeAs(array);
+        assertThat(stringBuilder).hasSameSizeAs(string);
+        assertThat(stringBuilder).hasSameSizeAs(stringBuilder);
+        assertThat(stringBuilder).hasSize(map.size()); // currently unsupported in assertj
+
+        assertThat(map).isEmpty();
+        assertThat(map).isEmpty();
+        assertThat(map).isNotEmpty();
+        assertThat(map).as("hi").isNotEmpty();
+        assertThat(map).isNotEmpty();
+        assertThat(map).isEmpty();
+        assertThat(map).isEmpty();
+        assertThat(map).hasSameSizeAs(list);
+        assertThat(map).hasSameSizeAs(array);
+        assertThat(map).hasSize(string.length()); // does currently not support hasSameSizeAs() in assertj
+        assertThat(map).hasSize(stringBuilder.length()); // does currently not support hasSameSizeAs() in assertj
+        assertThat(map).hasSameSizeAs(otherMap);
+        assertThat(map).hasSize(1);
+        assertThat(map).hasSizeGreaterThan(array.length - 1);
+        assertThat(map).hasSizeGreaterThanOrEqualTo(array.length + 1);
+        assertThat(map).hasSizeLessThan(array.length - 3);
+        assertThat(map).hasSizeLessThanOrEqualTo(1 - array.length);
+        assertThat(map).hasSameSizeAs(list);
+        assertThat(map).hasSameSizeAs(array);
+        assertThat(map).hasSize(string.length()); // currently unsupported in assertj
+        assertThat(map).hasSize(stringBuilder.length()); // currently unsupported in assertj
+        assertThat(map).hasSameSizeAs(otherMap);
 
         assertThat(stringBuilder.length()).as("foo").isEqualTo(0).isZero().as("bar").isNotZero().isEqualTo(10);
 
@@ -104,7 +140,7 @@ public class Size {
         assertThat(foo).isEqualTo(0);
         assertThat(string.length()).isPositive();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(string, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/Size/SizeBefore.java

@@ -1,6 +1,9 @@
 import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class Size {
 
@@ -11,6 +14,8 @@ public class Size {
         long[] otherArray = new long[4];
         String string = "string";
         StringBuilder stringBuilder = new StringBuilder();
+        Map<String, Integer> map = new HashMap<>();
+        Map<String, Integer> otherMap = new HashMap<>();
 
         assertThat(list.size()).isEqualTo(0);
         assertThat(list.size()).isZero();
@@ -21,8 +26,9 @@ public class Size {
         assertThat(list.size()).isLessThanOrEqualTo(0);
         assertThat(list.size()).isEqualTo(otherList.size());
         assertThat(list.size()).isEqualTo(array.length);
-        assertThat(list.size()).isEqualTo(string.length());
+        assertThat(list.size()).isEqualTo(string.length()); // does currently not support hasSameSizeAs() in assertj
-        assertThat(list.size()).isEqualTo(stringBuilder.length());
+        assertThat(list.size()).isEqualTo(stringBuilder.length()); // does currently not support hasSameSizeAs() in assertj
+        assertThat(list.size()).isEqualTo(map.size()); // does currently not support hasSameSizeAs() in assertj
         assertThat(list.size()).isEqualTo(1);
         assertThat(list.size()).isGreaterThan(otherList.size() * 2);
         assertThat(list.size()).isGreaterThanOrEqualTo(otherList.size() * 2);
@@ -30,8 +36,9 @@ public class Size {
         assertThat(list.size()).isLessThanOrEqualTo(otherList.size() * 2);
         assertThat(list).hasSize(otherList.size());
         assertThat(list).hasSize(array.length);
-        assertThat(list).hasSize(string.length());
+        assertThat(list).hasSize(string.length()); // currently unsupported in assertj
-        assertThat(list).hasSize(stringBuilder.length());
+        assertThat(list).hasSize(stringBuilder.length()); // currently unsupported in assertj
+        assertThat(list).hasSize(map.size()); // currently unsupported in assertj
 
         assertThat(array.length).isEqualTo(0);
         assertThat(array.length).isZero();
@@ -42,8 +49,9 @@ public class Size {
         assertThat(array.length).isLessThanOrEqualTo(0);
         assertThat(array.length).isEqualTo(list.size());
         assertThat(array.length).isEqualTo(otherArray.length);
-        assertThat(array.length).isEqualTo(string.length());
+        assertThat(array.length).isEqualTo(string.length()); // does currently not support hasSameSizeAs() in assertj
-        assertThat(array.length).isEqualTo(stringBuilder.length());
+        assertThat(array.length).isEqualTo(stringBuilder.length()); // does currently not support hasSameSizeAs() in assertj
+        assertThat(array.length).isEqualTo(map.size()); // does currently not support hasSameSizeAs() in assertj
         assertThat(array.length).isEqualTo(1);
         assertThat(array.length).isGreaterThan(otherArray.length - 1);
         assertThat(array.length).isGreaterThanOrEqualTo(otherArray.length + 1);
@@ -51,8 +59,9 @@ public class Size {
         assertThat(array.length).isLessThanOrEqualTo(1 - otherArray.length);
         assertThat(array).hasSize(list.size());
         assertThat(array).hasSize(otherArray.length);
-        assertThat(array).hasSize(string.length());
+        assertThat(array).hasSize(string.length()); // currently unsupported in assertj
-        assertThat(array).hasSize(stringBuilder.length());
+        assertThat(array).hasSize(stringBuilder.length()); // currently unsupported in assertj
+        assertThat(array).hasSize(map.size()); // currently unsupported in assertj
 
         assertThat(string.length()).isEqualTo(0);
         assertThat(string.length()).isZero();
@@ -62,18 +71,20 @@ public class Size {
         assertThat(string.length()).isLessThan(1);
         assertThat(string.length()).isLessThanOrEqualTo(0);
         assertThat(string.length()).isEqualTo(list.size());
-        assertThat(string.length()).isEqualTo(otherArray.length);
+        assertThat(string.length()).isEqualTo(array.length);
         assertThat(string.length()).isEqualTo(string.length());
         assertThat(string.length()).isEqualTo(stringBuilder.length());
+        assertThat(string.length()).isEqualTo(map.size()); // currently unsupported in assertj
         assertThat(string.length()).isEqualTo(1);
-        assertThat(string.length()).isGreaterThan(otherArray.length - 1);
+        assertThat(string.length()).isGreaterThan(array.length - 1);
-        assertThat(string.length()).isGreaterThanOrEqualTo(otherArray.length + 1);
+        assertThat(string.length()).isGreaterThanOrEqualTo(array.length + 1);
-        assertThat(string.length()).isLessThan(otherArray.length - 3);
+        assertThat(string.length()).isLessThan(array.length - 3);
-        assertThat(string.length()).isLessThanOrEqualTo(1 - otherArray.length);
+        assertThat(string.length()).isLessThanOrEqualTo(1 - array.length);
-        assertThat(string).hasSize(otherList.size());
+        assertThat(string).hasSize(list.size());
         assertThat(string).hasSize(array.length);
         assertThat(string).hasSize(string.length());
         assertThat(string).hasSize(stringBuilder.length());
+        assertThat(string).hasSize(map.size()); // currently unsupported in assertj
 
         assertThat(stringBuilder.length()).isEqualTo(0);
         assertThat(stringBuilder.length()).isZero();
@@ -83,18 +94,43 @@ public class Size {
         assertThat(stringBuilder.length()).isLessThan(1);
         assertThat(stringBuilder.length()).isLessThanOrEqualTo(0);
         assertThat(stringBuilder.length()).isEqualTo(list.size());
-        assertThat(stringBuilder.length()).isEqualTo(otherArray.length);
+        assertThat(stringBuilder.length()).isEqualTo(array.length);
         assertThat(stringBuilder.length()).isEqualTo(string.length());
         assertThat(stringBuilder.length()).isEqualTo(stringBuilder.length());
+        assertThat(stringBuilder.length()).isEqualTo(map.size()); // does currently not support hasSameSizeAs() in assertj
         assertThat(stringBuilder.length()).isEqualTo(1);
-        assertThat(stringBuilder.length()).isGreaterThan(otherArray.length - 1);
+        assertThat(stringBuilder.length()).isGreaterThan(array.length - 1);
-        assertThat(stringBuilder.length()).isGreaterThanOrEqualTo(otherArray.length + 1);
+        assertThat(stringBuilder.length()).isGreaterThanOrEqualTo(array.length + 1);
-        assertThat(stringBuilder.length()).isLessThan(otherArray.length - 3);
+        assertThat(stringBuilder.length()).isLessThan(array.length - 3);
-        assertThat(stringBuilder.length()).isLessThanOrEqualTo(1 - otherArray.length);
+        assertThat(stringBuilder.length()).isLessThanOrEqualTo(1 - array.length);
-        assertThat(stringBuilder).hasSize(otherList.size());
+        assertThat(stringBuilder).hasSize(list.size());
         assertThat(stringBuilder).hasSize(array.length);
         assertThat(stringBuilder).hasSize(string.length());
         assertThat(stringBuilder).hasSize(stringBuilder.length());
+        assertThat(stringBuilder).hasSize(map.size()); // currently unsupported in assertj
+
+        assertThat(map.size()).isEqualTo(0);
+        assertThat(map.size()).isZero();
+        assertThat(map.size()).isNotZero();
+        assertThat(map.size()).as("hi").isGreaterThan(0);
+        assertThat(map.size()).isGreaterThanOrEqualTo(1);
+        assertThat(map.size()).isLessThan(1);
+        assertThat(map.size()).isLessThanOrEqualTo(0);
+        assertThat(map.size()).isEqualTo(list.size());
+        assertThat(map.size()).isEqualTo(array.length);
+        assertThat(map.size()).isEqualTo(string.length()); // does currently not support hasSameSizeAs() in assertj
+        assertThat(map.size()).isEqualTo(stringBuilder.length()); // does currently not support hasSameSizeAs() in assertj
+        assertThat(map.size()).isEqualTo(otherMap.size());
+        assertThat(map.size()).isEqualTo(1);
+        assertThat(map.size()).isGreaterThan(array.length - 1);
+        assertThat(map.size()).isGreaterThanOrEqualTo(array.length + 1);
+        assertThat(map.size()).isLessThan(array.length - 3);
+        assertThat(map.size()).isLessThanOrEqualTo(1 - array.length);
+        assertThat(map).hasSize(list.size());
+        assertThat(map).hasSize(array.length);
+        assertThat(map).hasSize(string.length()); // currently unsupported in assertj
+        assertThat(map).hasSize(stringBuilder.length()); // currently unsupported in assertj
+        assertThat(map).hasSize(otherMap.size());
 
         assertThat(stringBuilder.length()).as("foo").isEqualTo(0).isZero().as("bar").isNotZero().isEqualTo(10);
 
@@ -104,7 +140,7 @@ public class Size {
         assertThat(foo).isEqualTo(0);
         assertThat(string.length()).isPositive();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(string, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/StringExpression/StringExpressionAfter.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class StringExpression {
 
@@ -50,7 +51,7 @@ public class StringExpression {
         assertThat(string.endsWith("foo")).as("foo").isEqualTo(false).as("bar").isTrue();
         assertThat(string.endsWith("foo")).as("foo").satisfies(it -> it.booleanValue()).as("bar").isFalse();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(string, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/StringExpression/StringExpressionBefore.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class StringExpression {
 
@@ -50,7 +51,7 @@ public class StringExpression {
         assertThat(string.endsWith("foo")).as("foo").isEqualTo(false).as("bar").isTrue();
         assertThat(string.endsWith("foo")).as("foo").satisfies(it -> it.booleanValue()).as("bar").isFalse();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(string, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/StringIsEmpty/StringIsEmptyAfter.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class StringIsEmpty {
 
@@ -19,7 +20,7 @@ public class StringIsEmpty {
         assertThat(string).as("foo").isEqualTo("").as("bar").hasSize(0).hasSameSizeAs("foo").isEmpty();
         assertThat(string).as("foo").isEqualTo("").as("bar").hasSize(0).hasSameSizeAs("foo").isEmpty();
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(string, null);
         fail("oh no!");
     }
 }

src/test/resources/inspections/StringIsEmpty/StringIsEmptyBefore.java

@@ -1,4 +1,5 @@
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class StringIsEmpty {
 
@@ -19,7 +20,7 @@ public class StringIsEmpty {
         assertThat(string).as("foo").isEqualTo("").as("bar").hasSize(0).hasSameSizeAs("foo").isEqualTo("");
         assertThat(string).as("foo").isEqualTo("").as("bar").hasSize(0).hasSameSizeAs("foo").hasSize(0);
 
-        org.junit.Assert.assertThat(foo, null);
+        org.junit.Assert.assertThat(string, null);
         fail("oh no!");
     }
 }