KT-14329 Do not report inspection "Remove empty class body" for anonymous objects (#972)

idea/src/org/jetbrains/kotlin/idea/intentions/RemoveEmptyClassBodyIntention.kt

@@ -21,6 +21,8 @@ import com.intellij.codeInspection.ProblemHighlightType
 import com.intellij.openapi.editor.Editor
 import org.jetbrains.kotlin.idea.inspections.IntentionBasedInspection
 import org.jetbrains.kotlin.psi.KtClassBody
+import org.jetbrains.kotlin.psi.KtObjectDeclaration
+import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
 
 class RemoveEmptyClassBodyInspection : IntentionBasedInspection<KtClassBody>(RemoveEmptyClassBodyIntention::class), CleanupLocalInspectionTool {
     override val problemHighlightType: ProblemHighlightType
@@ -30,5 +32,10 @@ class RemoveEmptyClassBodyInspection : IntentionBasedInspection<KtClassBody>(Rem
 class RemoveEmptyClassBodyIntention : SelfTargetingOffsetIndependentIntention<KtClassBody>(KtClassBody::class.java, "Remove empty class body") {
     override fun applyTo(element: KtClassBody, editor: Editor?) = element.delete()
 
-    override fun isApplicableTo(element: KtClassBody) = element.text.replace("{", "").replace("}", "").isBlank()
+    override fun isApplicableTo(element: KtClassBody): Boolean {
+        element.getStrictParentOfType<KtObjectDeclaration>()?.let {
+            if (it.isObjectLiteral()) return false
+        }
+        return element.text.replace("{", "").replace("}", "").isBlank()
+    }
 }

idea/testData/intentions/removeEmptyClassBody/anonymousInterfaceObject.kt

@@ -0,0 +1,7 @@
+// IS_APPLICABLE: false
+
+interface Foo
+
+fun test() {
+    val value = object : Foo {}<caret>
+}

idea/testData/intentions/removeEmptyClassBody/anonymousObject.kt

@@ -0,0 +1,5 @@
+// IS_APPLICABLE: false
+
+fun test() {
+    object {}<caret>
+}

idea/testData/intentions/removeEmptyClassBody/innerClass.kt

@@ -0,0 +1,3 @@
+object Foo {
+    class Bar {}<caret>
+}

idea/testData/intentions/removeEmptyClassBody/innerClass.kt.after

@@ -0,0 +1,3 @@
+object Foo {
+    class Bar
+}

idea/testData/intentions/removeEmptyClassBody/nestedAnonymous.kt

@@ -0,0 +1,7 @@
+// IS_APPLICABLE: false
+
+object Foo {
+    fun test() {
+        object {}<caret>
+    }
+}

idea/testData/intentions/removeEmptyClassBody/object.kt

@@ -0,0 +1,4 @@
+object Foo {<caret>
+
+
+}

idea/testData/intentions/removeEmptyClassBody/object.kt.after

@@ -0,0 +1 @@
+object Foo

idea/tests/org/jetbrains/kotlin/idea/intentions/IntentionTestGenerated.java

@@ -10446,6 +10446,18 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/intentions/removeEmptyClassBody"), Pattern.compile("^([\\w\\-_]+)\\.kt$"), true);
         }
 
+        @TestMetadata("anonymousInterfaceObject.kt")
+        public void testAnonymousInterfaceObject() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/removeEmptyClassBody/anonymousInterfaceObject.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("anonymousObject.kt")
+        public void testAnonymousObject() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/removeEmptyClassBody/anonymousObject.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("emptyClass.kt")
         public void testEmptyClass() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/removeEmptyClassBody/emptyClass.kt");
@@ -10464,11 +10476,29 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             doTest(fileName);
         }
 
+        @TestMetadata("innerClass.kt")
+        public void testInnerClass() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/removeEmptyClassBody/innerClass.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nestedAnonymous.kt")
+        public void testNestedAnonymous() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/removeEmptyClassBody/nestedAnonymous.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("noneEmptyClass.kt")
         public void testNoneEmptyClass() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/removeEmptyClassBody/noneEmptyClass.kt");
             doTest(fileName);
         }
+
+        @TestMetadata("object.kt")
+        public void testObject() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/removeEmptyClassBody/object.kt");
+            doTest(fileName);
+        }
     }
 
     @TestMetadata("idea/testData/intentions/removeEmptyParenthesesFromLambdaCall")