Fixed two possible index out of bounds exceptions in ExtractorReferenceContributor and BogusAssertionInspection. Prepared release.

Now uses Gradle 6.5.1.

README.md

@@ -503,6 +503,15 @@ You can toggle the various inspections in the Settings/Editor/Inspections in the
 
   There are, of course, more variations of the theme.
   
+  If both sides of an assertion are constant expressions, the problem will only appear as
+  a weak warning without a quick fix.
+  
+  Constants used on the actual side of ```.matches()``` and ```doesNotMatch()``` will not be
+  reported for regular expression testing.
+  
+  Neither will a ```Class``` type be considered a constant in the classic sense, so
+  ```assertThat(SomeClass.class).isAssignableFrom(SomeOtherClass.class)``` will not be reported.
+
 - BogusAssertion
 
   Sometimes programmers make copy and paste or logical errors writing down assertions
@@ -549,6 +558,14 @@ You can toggle the various inspections in the Settings/Editor/Inspections in the
   assertThat(map).hasSameSizeAs(map);
   ```
 
+  Note that expressions with method calls will not cause a warning as the method call might have side effects
+  that result in the assertion not being bogus at all.
+
+  If the assertions is either ```isEqualTo()``` or ```hasSameHashCodeAs()``` it may be checking custom
+  ```equals()``` or ```hashCode()``` behavior. If the test method name containing the statement has a
+  name that contains 'equal' or 'hashcode' (case insensitive), the warning will be weakened to information
+  level.
+
 - ImplicitAssertion
 
   Detects and removes implicit use of ```isNotNull()```, ```isNotEmpty()``` and
@@ -776,6 +793,20 @@ Feel free to use the code (in package ```de.platon42.intellij.jupiter```) for yo
 
 ## Changelog
 
+#### V1.10 (31-Jul-20) Friday the 31st Edition
+- Updated libraries to the latest versions (including AssertJ 3.16.1 and Kotlin 1.40-rc).
+- Fixed two possible index out of bounds exceptions in ExtractorReferenceContributor and BogusAssertionInspection.
+
+#### V1.9 (25-Feb-20) Mardi Gras Edition
+- TwistedAssertion inspection will no longer warn for ```.matches()``` and ```doesNotMatch()``` for regular expressions.
+  Apparently, ```assertThat("somestring").matches(regex)``` is a valid test if the regex is what needs to be tested.
+  If the actual expression is of ```Class``` type, this will no longer be reported.
+- If the expected expression in TwistedAssertion is also a constant, the warning will be weakened and
+  no quick fix will be available.
+- BogusAssertion inspection will no longer warn if the expression contains method calls.
+  Moreover, for assertions of ```isEqualTo()``` and ```hasSameHashCodeAs()```, AND if the containing method name contains 'equal' or 'hashcode',
+  the warning will be reduced to information level as the assertion may be testing ```equals()``` or ```hashCode()``` for validity.
+
 #### V1.8 (14-Feb-20) Valentine Edition
 - Maintenance. Removed experimental API use. Updated dependencies. Fixed testing problems introduced with IntelliJ IDEA 2019.3
 - Added new TwistedAssertion inspection that will warn about assertions with the actual expression being a constant indicating

build.gradle

@@ -1,13 +1,13 @@
 plugins {
     id 'java'
-    id 'org.jetbrains.intellij' version '0.4.16'
+    id 'org.jetbrains.intellij' version '0.4.21'
-    id 'org.jetbrains.kotlin.jvm' version '1.3.61'
+    id 'org.jetbrains.kotlin.jvm' version '1.4.0-rc'
     id 'jacoco'
-    id 'com.github.kt3k.coveralls' version '2.9.0'
+    id 'com.github.kt3k.coveralls' version '2.10.1'
 }
 
 group 'de.platon42'
-version '1.8'
+version '1.10'
 
 repositories {
     mavenCentral()
@@ -20,10 +20,10 @@ repositories {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
-    testCompile "org.assertj:assertj-core:3.15.0"
+    testImplementation "org.assertj:assertj-core:3.16.1"
-    testCompile "org.assertj:assertj-guava:3.3.0"
+    testImplementation "org.assertj:assertj-guava:3.4.0"
-    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.0'
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.2'
-    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.6.0'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.6.2'
     testImplementation "org.jetbrains.kotlin:kotlin-test"
 //    testImplementation "org.jetbrains.kotlin:kotlin-test-junit"
 }
@@ -35,7 +35,7 @@ compileTestKotlin {
     kotlinOptions.jvmTarget = "1.8"
 }
 intellij {
-    version '2019.3.3'
+    version '2020.2'
 //    pluginName 'Concise AssertJ Optimizing Nitpicker (Cajon)'
     updateSinceUntilBuild false
     plugins = ['java']
@@ -43,12 +43,10 @@ intellij {
 
 patchPluginXml {
     changeNotes """
-  <h4>V1.8 (14-Feb-20) Valentine Edition</h4>
+  <h4>V1.10 (31-Jul-20) Friday the 31st Edition</h4>
     <ul>
-      <li>Maintenance. Removed experimental API use. Updated dependencies. Fixed testing problems introduced with IntelliJ IDEA 2019.3.x
+      <li>Updated libraries to the latest versions (including AssertJ 3.16.1 and Kotlin 1.40-rc).
-      <li>Added new TwistedAssertion inspection that will warn about assertions with the actual expression being a constant indicating
+      <li>Fixed two possible index out of bounds exceptions in ExtractorReferenceContributor and BogusAssertionInspection.
-          swapped use of actual and expected expressions.
-      <li>Added new BogusAssertion inspection that showing typical copy and paste errors where actual and expected expressions are the same.
     </ul>
   <p>Full changelog available at <a href="https://github.com/chrisly42/cajon-plugin#changelog">Github project site</a>.</p>
 """

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,5 @@
-#Thu Feb 21 17:35:51 CET 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-all.zip

gradlew

@@ -1,5 +1,21 @@
 #!/usr/bin/env sh
 
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -28,7 +44,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
@@ -66,6 +82,7 @@ esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
@@ -109,10 +126,11 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
+# For Cygwin or MSYS, switch paths to Windows format before running java
-if $cygwin ; then
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    
     JAVACMD=`cygpath --unix "$JAVACMD"`
 
     # We build the pattern for arguments to be converted via cygpath
@@ -138,19 +156,19 @@ if $cygwin ; then
         else
             eval `echo args$i`="\"$arg\""
         fi
-        i=$((i+1))
+        i=`expr $i + 1`
     done
     case $i in
-        (0) set -- ;;
+        0) set -- ;;
-        (1) set -- "$args0" ;;
+        1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
+        2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
@@ -159,14 +177,9 @@ save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
-APP_ARGS=$(save "$@")
+APP_ARGS=`save "$@"`
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
 exec "$JAVACMD" "$@"

gradlew.bat

@@ -1,3 +1,19 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -13,8 +29,11 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
@@ -65,6 +84,7 @@ set CMD_LINE_ARGS=%*
 
 set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
+
 @rem Execute Gradle
 "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
 

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

@@ -1,10 +1,8 @@
 package de.platon42.intellij.plugins.cajon.inspections
 
+import com.intellij.codeInspection.ProblemHighlightType
 import com.intellij.codeInspection.ProblemsHolder
-import com.intellij.psi.JavaElementVisitor
+import com.intellij.psi.*
-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 com.siyeh.ig.psiutils.EquivalenceChecker
@@ -15,6 +13,7 @@ class BogusAssertionInspection : AbstractAssertJInspection() {
     companion object {
         private const val DISPLAY_NAME = "Bogus assertion due to same actual and expected expressions"
         private const val ACTUAL_IS_EQUAL_TO_EXPECTED_MESSAGE = "Actual expression in assertThat() is the same as expected"
+        private const val WEAK_ACTUAL_IS_EQUAL_TO_EXPECTED_MESSAGE = "Same actual and expected expression, but may be testing equals() or hashCode()"
 
         private val SAME_OBJECT =
             CallMatcher.instanceCall(
@@ -57,6 +56,12 @@ class BogusAssertionInspection : AbstractAssertJInspection() {
         private val SAME_OBJECT_ARRAY_CONTENTS =
             CallMatcher.instanceCall(AssertJClassNames.ABSTRACT_OBJECT_ARRAY_ASSERT_CLASSNAME, *ARRAY_METHODS).parameterCount(1)
 
+        private val HASHCODE_OR_IS_EQUAL_TO =
+            CallMatcher.instanceCall(
+                AssertJClassNames.ASSERT_INTERFACE,
+                MethodNames.IS_EQUAL_TO, "hasSameHashCodeAs"
+            ).parameterCount(1)
+
         private val SAME_ENUMERABLE_CONTENTS =
             CallMatcher.instanceCall(
                 AssertJClassNames.ENUMERABLE_ASSERT_INTERFACE,
@@ -127,12 +132,46 @@ class BogusAssertionInspection : AbstractAssertJInspection() {
                 // Note: replace with TrackingEquivalenceChecker() for IDEA >= 2019.1
                 val equivalenceChecker = EquivalenceChecker.getCanonicalPsiEquivalence()!!
                 val isSameExpression = allCalls
+                    .filter { it.argumentList.expressions.size == 1 }
                     .filter(SAME_ACTUAL_AND_EXPECTED_MATCHERS::test)
                     .any { equivalenceChecker.expressionsAreEquivalent(actualExpression, it.firstArg) }
                 if (isSameExpression) {
+                    if (!hasExpressionWithSideEffects(actualExpression)) {
+                        if (allCalls.any(HASHCODE_OR_IS_EQUAL_TO::test)) {
+                            val method = PsiTreeUtil.getParentOfType(statement, PsiMethod::class.java, true)
+                            val methodName = method?.name
+                            if ((methodName != null)
+                                && ((methodName.contains("equal", ignoreCase = true) || methodName.contains("hashcode", ignoreCase = true)))
+                            ) {
+                                if (isOnTheFly) {
+                                    holder.registerProblem(statement, WEAK_ACTUAL_IS_EQUAL_TO_EXPECTED_MESSAGE, ProblemHighlightType.INFORMATION)
+                                }
+                                return
+                            }
+                        }
                         holder.registerProblem(statement, ACTUAL_IS_EQUAL_TO_EXPECTED_MESSAGE)
                     }
                 }
             }
+
+            private fun hasExpressionWithSideEffects(actualExpression: PsiExpression): Boolean {
+                var result = false
+                PsiTreeUtil.processElements(actualExpression) { element ->
+                    val matched = when (element) {
+                        is PsiUnaryExpression -> (element.operationTokenType == JavaTokenType.PLUSPLUS)
+                                || (element.operationTokenType == JavaTokenType.MINUSMINUS)
+                        is PsiMethodCallExpression -> true
+                        else -> false
+                    }
+                    if (matched) {
+                        result = true
+                        false
+                    } else {
+                        true
+                    }
+                }
+                return result
+            }
+        }
     }
 }

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

@@ -1,10 +1,9 @@
 package de.platon42.intellij.plugins.cajon.inspections
 
+import com.intellij.codeInspection.ProblemHighlightType
 import com.intellij.codeInspection.ProblemsHolder
-import com.intellij.psi.JavaElementVisitor
+import com.intellij.psi.*
-import com.intellij.psi.PsiElementVisitor
+import com.intellij.psi.search.GlobalSearchScope
-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.*
@@ -32,6 +31,8 @@ class TwistedAssertionInspection : AbstractAssertJInspection() {
 
         private val STRING_IS_EQUAL_TO_IC = CallMatcher.instanceCall(AssertJClassNames.ABSTRACT_CHAR_SEQUENCE_ASSERT_CLASSNAME, MethodNames.IS_EQUAL_TO_IC).parameterCount(1)
 
+        private val STRING_REGEX_MATCHING = CallMatcher.instanceCall(AssertJClassNames.ABSTRACT_CHAR_SEQUENCE_ASSERT_CLASSNAME, "matches", "doesNotMatch").parameterCount(1)
+
         private val CALL_MATCHER_TO_REPLACEMENT_MAP = mapOf(
             GENERIC_IS_EQUAL_TO to MethodNames.IS_EQUAL_TO,
             GENERIC_IS_NOT_EQUAL_TO to MethodNames.IS_NOT_EQUAL_TO,
@@ -60,15 +61,28 @@ class TwistedAssertionInspection : AbstractAssertJInspection() {
                 actualExpression.calculateConstantValue() ?: return
                 val allCalls = assertThatCall.collectMethodCallsUpToStatement().toList()
                 val tooComplex = allCalls.find(USING_COMPARATOR::test) != null
+                var severity = ProblemHighlightType.GENERIC_ERROR_OR_WARNING
+                if (actualExpression.type is PsiClassType) {
+                    val psiManager = PsiManager.getInstance(statement.project)
+                    val javaLangClass = PsiType.getJavaLangClass(psiManager, GlobalSearchScope.allScope(statement.project))
+                    if (actualExpression.type!!.isAssignableFrom(javaLangClass)) {
+                        return
+                    }
+                }
+
                 if (!tooComplex) {
                     val onlyAssertionCalls = allCalls
                         .filterNot(NOT_ACTUAL_ASSERTIONS::test)
                         .toList()
                     if (onlyAssertionCalls.size == 1) {
-                        val originalMethodCall = onlyAssertionCalls.first()
+                        val expectedMethodCall = onlyAssertionCalls.first()
-                        val matchedMethod = CALL_MATCHER_TO_REPLACEMENT_MAP.asSequence().firstOrNull { it.key.test(originalMethodCall) }
+                        if (STRING_REGEX_MATCHING.test(expectedMethodCall)) {
+                            return
+                        }
+                        if (expectedMethodCall.getArgOrNull(0)?.calculateConstantValue() == null) {
+                            val matchedMethod = CALL_MATCHER_TO_REPLACEMENT_MAP.asSequence().firstOrNull { it.key.test(expectedMethodCall) }
                             if (matchedMethod != null) {
-                            val originalMethodName = getOriginalMethodName(originalMethodCall)
+                                val originalMethodName = getOriginalMethodName(expectedMethodCall)
                                 val replacementMethod = matchedMethod.value
                                 val description = if (originalMethodName == replacementMethod) {
                                     SWAP_ACTUAL_AND_EXPECTED_DESCRIPTION
@@ -82,9 +96,12 @@ class TwistedAssertionInspection : AbstractAssertJInspection() {
                                 )
                                 return
                             }
+                        } else {
+                            severity = ProblemHighlightType.WEAK_WARNING
                         }
                     }
-                holder.registerProblem(statement, ACTUAL_IS_A_CONSTANT_MESSAGE)
+                }
+                holder.registerProblem(statement, ACTUAL_IS_A_CONSTANT_MESSAGE, severity)
             }
         }
     }

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

@@ -124,6 +124,7 @@ class ExtractorReferenceContributor : PsiReferenceContributor() {
             if (!CallMatcher.anyOf(EXTRACTING_FROM_ITERABLE, FLAT_EXTRACTING_FROM_ITERABLE).test(methodCallExpression)) return null
 
             val iterableType = findActualType(methodCallExpression) ?: return null
+            if (iterableType.parameters.isEmpty()) return null
             val innerType = iterableType.resolveGenerics().substitutor.substitute(iterableType.parameters[0])
             val containingClass = PsiTypesUtil.getPsiClass(innerType) ?: return null
             return if (isResultOf) lookupMethod(containingClass, literal) else lookupFieldOrProperty(containingClass, literal, 0)

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

@@ -14,5 +14,6 @@ internal class BogusAssertionInspectionTest : AbstractCajonTest() {
         myFixture.enableInspections(BogusAssertionInspection::class.java)
         myFixture.configureByFile("BogusAssertionBefore.java")
         assertHighlightings(myFixture, 14 * 9 + 10 + 12 + 8, "Actual expression in assertThat() is the same as expected")
+        assertHighlightings(myFixture, 3, "Same actual and expected expression, but may be testing equals() or hashCode()")
     }
 }

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

@@ -13,7 +13,7 @@ internal class TwistedAssertionInspectionTest : AbstractCajonTest() {
     internal fun hint_twisted_actual_and_expected_and_provide_quickfix_where_possible(@MyFixture myFixture: JavaCodeInsightTestFixture) {
         myFixture.enableInspections(TwistedAssertionInspection::class.java)
         myFixture.configureByFile("TwistedAssertionBefore.java")
-        assertHighlightings(myFixture, 4, "Actual expression in assertThat() is a constant")
+        assertHighlightings(myFixture, 5, "Actual expression in assertThat() is a constant")
         assertHighlightings(myFixture, 10, "Twisted actual and expected expressions")
 
         executeQuickFixes(myFixture, Regex.fromLiteral("Swap actual and expected expressions in assertion"), 6)

src/test/resources/inspections/BogusAssertion/BogusAssertionBefore.java

@@ -1,3 +1,4 @@
+import java.io.File;
 import java.util.*;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -190,7 +191,28 @@ public class BogusAssertions {
 
         assertThat(bar).isEqualTo(string);
 
+        assertThat(new Random().nextBoolean()).isEqualTo(new Random().nextBoolean());
+        assertThat(generateString()).isEqualTo(generateString());
+
+        int number = 4;
+        assertThat(number++).isEqualTo(number++);
+        assertThat(number++).isEqualTo(number++);
+
         org.junit.Assert.assertThat(list, null);
         fail("oh no!");
     }
+
+    private void test_equals() {
+        assertThat("foo").isEqualTo("foo");
+        assertThat(new File("foo")).isEqualTo(new File("foo"));
+    }
+
+    private void test_HasHCode() {
+        assertThat("foo").hasSameHashCodeAs("foo");
+    }
+
+    private String generateString()
+    {
+        return "foo";
+    }
 }

src/test/resources/inspections/TwistedAssertion/TwistedAssertionAfter.java

@@ -1,4 +1,5 @@
 import java.util.*;
+import java.util.regex.Pattern;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.fail;
@@ -32,6 +33,13 @@ public class TwistedAssertions {
         assertThat(4).isEqualTo(number).isNotEqualTo(number * 2);
         assertThat(4).usingComparator(Comparator.reverseOrder()).isGreaterThanOrEqualTo(number);
 
+        assertThat(String.class).isEqualTo(Class.forName("java.lang.String"));
+        assertThat("XX").matches(Pattern.compile(".."));
+        assertThat("XX").matches(".."));
+        assertThat("XX").doesNotMatch(Pattern.compile(".."));
+        assertThat("XX").doesNotMatch(".."));
+        assertThat(SOME_CONST).isEqualTo(10);
+
         org.junit.Assert.assertThat(list, null);
         fail("oh no!");
     }

src/test/resources/inspections/TwistedAssertion/TwistedAssertionBefore.java

@@ -1,4 +1,5 @@
 import java.util.*;
+import java.util.regex.Pattern;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.fail;
@@ -32,6 +33,13 @@ public class TwistedAssertions {
         assertThat(4).isEqualTo(number).isNotEqualTo(number * 2);
         assertThat(4).usingComparator(Comparator.reverseOrder()).isGreaterThanOrEqualTo(number);
 
+        assertThat(String.class).isEqualTo(Class.forName("java.lang.String"));
+        assertThat("XX").matches(Pattern.compile(".."));
+        assertThat("XX").matches(".."));
+        assertThat("XX").doesNotMatch(Pattern.compile(".."));
+        assertThat("XX").doesNotMatch(".."));
+        assertThat(SOME_CONST).isEqualTo(10);
+
         org.junit.Assert.assertThat(list, null);
         fail("oh no!");
     }