[java-completion] Put a colon for multiple case labels

IDEA-296940

GitOrigin-RevId: cd5d256b6082d3dd6aa246a40cce6294f93f8fdd

java/java-impl/src/com/intellij/codeInsight/editorActions/smartEnter/SwitchLabelColonFixer.java

@@ -16,6 +16,7 @@
 package com.intellij.codeInsight.editorActions.smartEnter;
 
 import com.intellij.openapi.editor.Editor;
+import com.intellij.psi.PsiCaseLabelElementList;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiSwitchLabelStatement;
 import com.intellij.util.IncorrectOperationException;
@@ -28,7 +29,8 @@ public class SwitchLabelColonFixer implements Fixer {
   public void apply(Editor editor, JavaSmartEnterProcessor processor, PsiElement psiElement) throws IncorrectOperationException {
     if (psiElement instanceof PsiSwitchLabelStatement && !psiElement.getText().endsWith(":")) {
       PsiSwitchLabelStatement statement = (PsiSwitchLabelStatement)psiElement;
-      if (statement.getCaseValue() != null || statement.isDefaultCase()) {
+      PsiCaseLabelElementList labelElementList = statement.getCaseLabelElementList();
+      if ((labelElementList != null && labelElementList.getElementCount() != 0) || statement.isDefaultCase()) {
         editor.getDocument().insertString(psiElement.getTextRange().getEndOffset(), ":");
       }
     }

java/java-tests/testData/codeInsight/completeStatement/MultipleCasesColon.java

@@ -0,0 +1,8 @@
+
+class Foo {
+  void foo(String a) {
+    switch (a) {
+      case "dzyolya", "izyayu<caret>"
+    }
+  }
+}

java/java-tests/testData/codeInsight/completeStatement/MultipleCasesColon_after.java

@@ -0,0 +1,9 @@
+
+class Foo {
+  void foo(String a) {
+    switch (a) {
+        case "dzyolya", "izyayu":
+            <caret>
+    }
+  }
+}

java/java-tests/testSrc/com/intellij/java/codeInsight/CompleteStatementTest.java

@@ -139,6 +139,7 @@ public class CompleteStatementTest extends EditorActionTestCase {
   public void testSwitchKeywordWithCondition() { doTest(); }
   public void testSwitchBraces() { doTest(); }
   public void testCaseColon() { doTest(); }
+  public void testMultipleCasesColon() { doTest(); }
   public void testDefaultColon() { doTest(); }
   public void testNewInParentheses() { doTest(); }
   public void testIDEADEV20713() { doTest(); }