Added several cases for hasSizeGreaterThan/LessThan/OrEqualTo() for EnumerablesEmpty inspection.

README.md

@@ -415,11 +415,21 @@ You can toggle the various inspections in the Settings/Editor/Inspections in the
 
 - AssertThatEnumerableIsEmpty
 
-  Uses ```isEmpty()``` for ```hasSize(0)``` iterable assertions instead.
+  Uses ```isEmpty()``` for ```hasSize(0)```, ```hasSizeLessThanOrEqualTo(0)```, and
+  ```hasSizeLessThan(1)``` iterable (enumerable) assertions instead.
+  
+  Also suggests ```isNotEmpty()``` for ```hasSizeGreaterThan(0)``` and 
+  ```hasSizeGreaterThanOrEqualTo(1)```.
   
   ```
   from: assertThat(enumerable).hasSize(0);
+  from: assertThat(enumerable).hasSizeLessThanOrEqualTo(0);
+  from: assertThat(enumerable).hasSizeLessThan(1);
     to: assertThat(enumerable).isEmpty();
+
+  from: assertThat(enumerable).hasSizeGreaterThan(0);
+  from: assertThat(enumerable).hasSizeGreaterThanOrEqualTo(1);
+    to: assertThat(enumerable).isNotEmpty();
   ```
 
 - AssertThatSize
@@ -805,6 +815,7 @@ Feel free to use the code (in package ```de.platon42.intellij.jupiter```) for yo
 - Updated various dependencies and AssertJ 3.17.2.
 - Fixed the ImplicitAssertionInspection that broke the plugin with IntelliJ 2020.3 EAP as reported by Frédéric Thomas. Thanks!
 - Added new singleElement() from AssertJ >= 3.17.0 to ImplicitAssertionInspection.
+- Added several cases for ```hasSizeGreaterThan/LessThan/OrEqualTo()``` for EnumerablesEmpty inspection.
 
 #### 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).

build.gradle

@@ -8,6 +8,8 @@ plugins {
 
 group 'de.platon42'
 version '1.11'
+sourceCompatibility = "1.8"
+targetCompatibility = "1.8"
 
 repositories {
     mavenCentral()
@@ -30,14 +32,10 @@ dependencies {
 
 compileKotlin {
     kotlinOptions.jvmTarget = "1.8"
-    sourceCompatibility = "1.8"
-    targetCompatibility = "1.8"
 }
 
 compileTestKotlin {
     kotlinOptions.jvmTarget = "1.8"
-    sourceCompatibility = "1.8"
-    targetCompatibility = "1.8"
 }
 
 intellij {
@@ -55,6 +53,7 @@ patchPluginXml {
       <li>Updated various dependencies and AssertJ 3.17.2.
       <li>Fixed the ImplicitAssertionInspection that broke the plugin with IntelliJ 2020.3 EAP as reported by Frédéric Thomas. Thanks!
       <li>Added new singleElement() from AssertJ >= 3.17.0 to ImplicitAssertionInspection.
+      <li>Added several cases for hasSizeGreaterThan/LessThan/OrEqualTo() for EnumerablesEmpty inspection.
     </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/inspections/AbstractAssertJInspection.kt

@@ -126,6 +126,14 @@ abstract class AbstractAssertJInspection : AbstractBaseJavaLocalInspectionTool()
             .parameterCount(0)!!
         val HAS_SIZE = CallMatcher.instanceCall(ENUMERABLE_ASSERT_INTERFACE, MethodNames.HAS_SIZE)
             .parameterTypes("int")!!
+        val HAS_SIZE_GREATER_THAN_INT = CallMatcher.instanceCall(ENUMERABLE_ASSERT_INTERFACE, MethodNames.HAS_SIZE_GREATER_THAN)
+            .parameterTypes("int")!!
+        val HAS_SIZE_GREATER_THAN_OR_EQUAL_TO_INT = CallMatcher.instanceCall(ENUMERABLE_ASSERT_INTERFACE, MethodNames.HAS_SIZE_GREATER_THAN_OR_EQUAL_TO)
+            .parameterTypes("int")!!
+        val HAS_SIZE_LESS_THAN_INT = CallMatcher.instanceCall(ENUMERABLE_ASSERT_INTERFACE, MethodNames.HAS_SIZE_LESS_THAN)
+            .parameterTypes("int")!!
+        val HAS_SIZE_LESS_THAN_OR_EQUAL_TO_INT = CallMatcher.instanceCall(ENUMERABLE_ASSERT_INTERFACE, MethodNames.HAS_SIZE_LESS_THAN_OR_EQUAL_TO)
+            .parameterTypes("int")!!
 
         val IS_GREATER_THAN_INT = CallMatcher.instanceCall(ABSTRACT_COMPARABLE_ASSERT_CLASSNAME, MethodNames.IS_GREATER_THAN)
             .parameterTypes("int")!!

src/main/java/de/platon42/intellij/plugins/cajon/inspections/AssertThatEnumerableIsEmptyInspection.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.MethodNames
 import de.platon42.intellij.plugins.cajon.calculateConstantParameterValue
 import de.platon42.intellij.plugins.cajon.hasAssertThat
@@ -12,7 +13,7 @@ import de.platon42.intellij.plugins.cajon.hasAssertThat
 class AssertThatEnumerableIsEmptyInspection : AbstractAssertJInspection() {
 
     companion object {
-        private const val DISPLAY_NAME = "Asserting an empty enumerable"
+        private const val DISPLAY_NAME = "Asserting an empty or not empty enumerable"
     }
 
     override fun getDisplayName() = DISPLAY_NAME
@@ -23,11 +24,17 @@ class AssertThatEnumerableIsEmptyInspection : AbstractAssertJInspection() {
                 super.visitMethodCallExpression(expression)
                 if (!expression.hasAssertThat()) return
                 val isLastExpression = expression.parent is PsiStatement
-                if (!(HAS_SIZE.test(expression) && isLastExpression)) return
-
                 val value = expression.calculateConstantParameterValue(0) ?: return
-                if (value == 0) {
+
+                val isEmpty = (CallMatcher.anyOf(HAS_SIZE, HAS_SIZE_LESS_THAN_OR_EQUAL_TO_INT).test(expression) && (value == 0)) ||
+                        (HAS_SIZE_LESS_THAN_INT.test(expression) && (value == 1));
+                val isNotEmpty = (HAS_SIZE_GREATER_THAN_INT.test(expression) && (value == 0)) ||
+                        (HAS_SIZE_GREATER_THAN_OR_EQUAL_TO_INT.test(expression) && (value == 1));
+
+                if (isEmpty && isLastExpression) {
                     registerSimplifyMethod(holder, expression, MethodNames.IS_EMPTY)
+                } else if (isNotEmpty) {
+                    registerSimplifyMethod(holder, expression, MethodNames.IS_NOT_EMPTY)
                 }
             }
         }

src/main/resources/inspectionDescriptions/AssertThatEnumerableIsEmpty.html

@@ -1,6 +1,6 @@
 <html>
 <body>
-Turns assertThat(enumerable).hasSize(0) into assertThat(enumerable).isEmpty().
+Turns assertThat(enumerable).hasSize(0) and similar into assertThat(enumerable).isEmpty() or .isNotEmpty().
 <!-- tooltip end -->
 <br>Works with anything that is enumerable such as arrays, iterables, collections, etc.
 </body>

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

@@ -10,10 +10,14 @@ internal class AssertThatEnumerableIsEmptyInspectionTest : AbstractCajonTest() {
 
     @Test
     @TestDataSubPath("inspections/EnumerableIsEmpty")
-    internal fun assertThat_with_hasSize_zero_can_use_isEmpty(@MyFixture myFixture: JavaCodeInsightTestFixture) {
+    internal fun assertThat_with_hasSize_zero_and_similar_can_use_isEmpty(@MyFixture myFixture: JavaCodeInsightTestFixture) {
         myFixture.enableInspections(AssertThatEnumerableIsEmptyInspection::class.java)
         myFixture.configureByFile("EnumerableIsEmptyBefore.java")
         executeQuickFixes(myFixture, Regex.fromLiteral("Replace hasSize() with isEmpty()"), 5)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace hasSizeLessThan() with isEmpty()"), 5)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace hasSizeLessThanOrEqualTo() with isEmpty()"), 5)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace hasSizeGreaterThan() with isNotEmpty()"), 6)
+        executeQuickFixes(myFixture, Regex.fromLiteral("Replace hasSizeGreaterThanOrEqualTo() with isNotEmpty()"), 6)
         myFixture.checkResultByFile("EnumerableIsEmptyAfter.java")
     }
 }

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

@@ -16,7 +16,32 @@ public class EnumerableIsEmpty {
         assertThat(new ArrayList<Long>()).as("etc").hasSize(1);
         assertThat(new Long[1]).as("etc").hasSize(1);
 
+        assertThat("string").as("foo").isEmpty();
+        assertThat(new StringBuilder()).as("bar").isEmpty();
+        assertThat(new ArrayList<Long>()).as("etc").isEmpty();
+        assertThat(new Long[1]).as("etc").isEmpty();
+
+        assertThat("string").as("foo").isEmpty();
+        assertThat(new StringBuilder()).as("bar").isEmpty();
+        assertThat(new ArrayList<Long>()).as("etc").isEmpty();
+        assertThat(new Long[1]).as("etc").isEmpty();
+
+        assertThat("string").as("foo").isNotEmpty();
+        assertThat(new StringBuilder()).as("bar").isNotEmpty();
+        assertThat(new ArrayList<Long>()).as("etc").isNotEmpty();
+        assertThat(new Long[1]).as("etc").isNotEmpty();
+
+        assertThat("string").as("foo").isNotEmpty();
+        assertThat(new StringBuilder()).as("bar").isNotEmpty();
+        assertThat(new ArrayList<Long>()).as("etc").isNotEmpty();
+        assertThat(new Long[1]).as("etc").isNotEmpty();
+
         assertThat("string").as("foo").hasSize(0).hasSameSizeAs("foo").isEmpty();
+        assertThat("string").as("foo").hasSizeLessThanOrEqualTo(0).hasSameSizeAs("foo").isEmpty();
+        assertThat("string").as("foo").hasSizeLessThan(1).hasSameSizeAs("foo").isEmpty();
+
+        assertThat("string").as("foo").isNotEmpty().hasSameSizeAs("foo").isNotEmpty();
+        assertThat("string").as("foo").isNotEmpty().hasSameSizeAs("foo").isNotEmpty();
 
         org.junit.Assert.assertThat("foo", null);
         fail("oh no!");

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

@@ -16,7 +16,32 @@ public class EnumerableIsEmpty {
         assertThat(new ArrayList<Long>()).as("etc").hasSize(1);
         assertThat(new Long[1]).as("etc").hasSize(1);
 
+        assertThat("string").as("foo").hasSizeLessThanOrEqualTo(0);
+        assertThat(new StringBuilder()).as("bar").hasSizeLessThanOrEqualTo(0 + 0);
+        assertThat(new ArrayList<Long>()).as("etc").hasSizeLessThanOrEqualTo(10 / 100);
+        assertThat(new Long[1]).as("etc").hasSizeLessThanOrEqualTo(1 - 1);
+
+        assertThat("string").as("foo").hasSizeLessThan(1);
+        assertThat(new StringBuilder()).as("bar").hasSizeLessThan(0 + 1);
+        assertThat(new ArrayList<Long>()).as("etc").hasSizeLessThan(10 / 10);
+        assertThat(new Long[1]).as("etc").hasSizeLessThan(1 - 0);
+
+        assertThat("string").as("foo").hasSizeGreaterThan(0);
+        assertThat(new StringBuilder()).as("bar").hasSizeGreaterThan(0 + 0);
+        assertThat(new ArrayList<Long>()).as("etc").hasSizeGreaterThan(10 / 100);
+        assertThat(new Long[1]).as("etc").hasSizeGreaterThan(1 - 1);
+
+        assertThat("string").as("foo").hasSizeGreaterThanOrEqualTo(1);
+        assertThat(new StringBuilder()).as("bar").hasSizeGreaterThanOrEqualTo(0 + 1);
+        assertThat(new ArrayList<Long>()).as("etc").hasSizeGreaterThanOrEqualTo(10 / 10);
+        assertThat(new Long[1]).as("etc").hasSizeGreaterThanOrEqualTo(1 - 0);
+
         assertThat("string").as("foo").hasSize(0).hasSameSizeAs("foo").hasSize(0);
+        assertThat("string").as("foo").hasSizeLessThanOrEqualTo(0).hasSameSizeAs("foo").hasSizeLessThanOrEqualTo(0);
+        assertThat("string").as("foo").hasSizeLessThan(1).hasSameSizeAs("foo").hasSizeLessThan(1);
+
+        assertThat("string").as("foo").hasSizeGreaterThan(0).hasSameSizeAs("foo").hasSizeGreaterThan(0);
+        assertThat("string").as("foo").hasSizeGreaterThanOrEqualTo(1).hasSameSizeAs("foo").hasSizeGreaterThanOrEqualTo(1);
 
         org.junit.Assert.assertThat("foo", null);
         fail("oh no!");