Implemented AssertThatBooleanIsTrueOrFalseInspection.

src/test/java/de/platon42/intellij/playground/Playground.java

@@ -14,5 +14,38 @@ public class Playground {
         assertThat(new String[1].length).isLessThanOrEqualTo(1);
         assertThat(new String[1]).hasSameSizeAs(new Object());
         assertThat("").isEqualTo(null);
+        assertThat(true).isTrue();
+        assertThat(true).isEqualTo(true);
+        assertThat(Boolean.TRUE).isEqualTo(Boolean.FALSE);
+        assertThat(Boolean.TRUE).isEqualTo(true);
     }
+
+    private void booleanIsTrueOrFalse() {
+        boolean primitive = false;
+        Boolean object = java.lang.Boolean.TRUE;
+
+        assertThat(primitive).isEqualTo(Boolean.TRUE);
+        assertThat(primitive).isEqualTo(Boolean.FALSE);
+        assertThat(object).isEqualTo(Boolean.TRUE);
+        assertThat(object).isEqualTo(Boolean.FALSE);
+        assertThat(primitive).isEqualTo(true);
+        assertThat(primitive).isEqualTo(false);
+        assertThat(object).isEqualTo(true);
+        assertThat(object).isEqualTo(false);
+
+        assertThat(primitive).isNotEqualTo(Boolean.TRUE);
+        assertThat(primitive).isNotEqualTo(Boolean.FALSE);
+        assertThat(object).isNotEqualTo(Boolean.TRUE);
+        assertThat(object).isNotEqualTo(Boolean.FALSE);
+        assertThat(primitive).isNotEqualTo(true);
+        assertThat(primitive).isNotEqualTo(false);
+        assertThat(object).isNotEqualTo(true);
+        assertThat(object).isNotEqualTo(false);
+
+        assertThat(primitive).as("nah").isEqualTo(true && !true);
+        assertThat(object).isEqualTo(Boolean.TRUE && !Boolean.TRUE);
+
+        assertThat("").isEqualTo(Boolean.TRUE);
+    }
+
 }

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

@@ -59,8 +59,8 @@ abstract class AbstractCajonTest {
         }
     }
 
-    protected fun executeQuickFixes(myFixture: JavaCodeInsightTestFixture, expectedFixes: Int) {
-        val quickfixes = myFixture.getAllQuickFixes()
+    protected fun executeQuickFixes(myFixture: JavaCodeInsightTestFixture, regex: Regex, expectedFixes: Int) {
+        val quickfixes = myFixture.getAllQuickFixes().filter { it.familyName.matches(regex) }
         assertThat(quickfixes).hasSize(expectedFixes)
         quickfixes.forEach(myFixture::launchAction)
     }

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

@@ -0,0 +1,21 @@
+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 AssertThatBooleanIsTrueOrFalseInspectionTest : AbstractCajonTest() {
+
+    @Test
+    @TestDataSubPath("inspections/BooleanIsTrueOrFalse")
+    internal fun assertThat_with_isEqualTo_true_or_false_can_use_isTrue_or_isFalse(@MyFixture myFixture: JavaCodeInsightTestFixture) {
+        runTest {
+            myFixture.enableInspections(AssertThatBooleanIsTrueOrFalseInspection::class.java)
+            myFixture.configureByFile("BooleanIsTrueOrFalseBefore.java")
+            executeQuickFixes(myFixture, Regex("Replace is.*"), 17)
+            myFixture.checkResultByFile("BooleanIsTrueOrFalseAfter.java")
+        }
+    }
+}

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

@@ -14,7 +14,7 @@ internal class AssertThatObjectIsNotNullInspectionTest : AbstractCajonTest() {
         runTest {
             myFixture.enableInspections(AssertThatObjectIsNotNullInspection::class.java)
             myFixture.configureByFile("ObjectIsNotNullBefore.java")
-            executeQuickFixes(myFixture, 3)
+            executeQuickFixes(myFixture, Regex.fromLiteral("Replace isNotEqualTo(null) with isNotNull()"), 3)
             myFixture.checkResultByFile("ObjectIsNotNullAfter.java")
         }
     }

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

@@ -14,7 +14,7 @@ internal class AssertThatObjectIsNullInspectionTest : AbstractCajonTest() {
         runTest {
             myFixture.enableInspections(AssertThatObjectIsNullInspection::class.java)
             myFixture.configureByFile("ObjectIsNullBefore.java")
-            executeQuickFixes(myFixture, 3)
+            executeQuickFixes(myFixture, Regex.fromLiteral("Replace isEqualTo(null) with isNull()"), 3)
             myFixture.checkResultByFile("ObjectIsNullAfter.java")
         }
     }

src/test/resources/inspections/BooleanIsTrueOrFalse/BooleanIsTrueOrFalseAfter.java

@@ -0,0 +1,32 @@
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class BooleanIsTrueOrFalse {
+
+    private void booleanIsTrueOrFalse() {
+        boolean primitive = false;
+        Boolean object = Boolean.TRUE;
+
+        assertThat(primitive).isTrue();
+        assertThat(primitive).isFalse();
+        assertThat(object).isTrue();
+        assertThat(object).isFalse();
+        assertThat(primitive).isTrue();
+        assertThat(primitive).isFalse();
+        assertThat(object).isTrue();
+        assertThat(object).isFalse();
+
+        assertThat(primitive).isFalse();
+        assertThat(primitive).isTrue();
+        assertThat(object).isFalse();
+        assertThat(object).isTrue();
+        assertThat(primitive).isFalse();
+        assertThat(primitive).isTrue();
+        assertThat(object).isFalse();
+        assertThat(object).isTrue();
+
+        assertThat(primitive).as("nah").isFalse();
+        assertThat(object).isEqualTo(Boolean.TRUE && !Boolean.TRUE);
+
+        assertThat("").isEqualTo(Boolean.TRUE);
+    }
+}

src/test/resources/inspections/BooleanIsTrueOrFalse/BooleanIsTrueOrFalseBefore.java

@@ -0,0 +1,32 @@
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class BooleanIsTrueOrFalse {
+
+    private void booleanIsTrueOrFalse() {
+        boolean primitive = false;
+        Boolean object = Boolean.TRUE;
+
+        assertThat(primitive).isEqualTo(Boolean.TRUE);
+        assertThat(primitive).isEqualTo(Boolean.FALSE);
+        assertThat(object).isEqualTo(Boolean.TRUE);
+        assertThat(object).isEqualTo(Boolean.FALSE);
+        assertThat(primitive).isEqualTo(true);
+        assertThat(primitive).isEqualTo(false);
+        assertThat(object).isEqualTo(true);
+        assertThat(object).isEqualTo(false);
+
+        assertThat(primitive).isNotEqualTo(Boolean.TRUE);
+        assertThat(primitive).isNotEqualTo(Boolean.FALSE);
+        assertThat(object).isNotEqualTo(Boolean.TRUE);
+        assertThat(object).isNotEqualTo(Boolean.FALSE);
+        assertThat(primitive).isNotEqualTo(true);
+        assertThat(primitive).isNotEqualTo(false);
+        assertThat(object).isNotEqualTo(true);
+        assertThat(object).isNotEqualTo(false);
+
+        assertThat(primitive).as("nah").isEqualTo(true && !true);
+        assertThat(object).isEqualTo(Boolean.TRUE && !Boolean.TRUE);
+
+        assertThat("").isEqualTo(Boolean.TRUE);
+    }
+}