IDEA-242810 Add colon to completion after "case" keyword

GitOrigin-RevId: 3b908b2eed06b41e08ef1c739d90a299389db8c9

java/java-impl/src/com/intellij/codeInsight/completion/JavaCompletionContributor.java

@@ -481,13 +481,9 @@ public class JavaCompletionContributor extends CompletionContributor {
     MultiMap<CompletionResultSet, LookupElement> items = MultiMap.create();
     final PsiElement position = parameters.getPosition();
     final boolean first = parameters.getInvocationCount() <= 1;
-    final TailType switchLabelTail;
-    if (IN_ENUM_SWITCH_LABEL.accepts(position)) {
-      PsiSwitchBlock block = Objects.requireNonNull(PsiTreeUtil.getParentOfType(position, PsiSwitchBlock.class));
-      switchLabelTail = TailTypes.forSwitchLabel(block);
-    } else {
-      switchLabelTail = null;
-    }
+    final TailType switchLabelTail = IN_SWITCH_LABEL.accepts(position)
+                                     ? TailTypes.forSwitchLabel(Objects.requireNonNull(PsiTreeUtil.getParentOfType(position, PsiSwitchBlock.class)))
+                                     : null;
     final boolean isAfterNew = JavaClassNameCompletionContributor.AFTER_NEW.accepts(position);
     final boolean pkgContext = JavaCompletionUtil.inSomePackage(position);
     final PsiType[] expectedTypes = ExpectedTypesGetter.getExpectedTypes(parameters.getPosition(), true);

java/java-tests/testData/codeInsight/completion/normal/CaseColonAfterStringConstant.java

@@ -0,0 +1,8 @@
+class Main {
+  public static final String STRING_CONSTANT = "abc";
+  public static void main(String[] args) {
+    switch (args[0]) {
+      case STRC<caret>
+    }
+  }
+}

java/java-tests/testData/codeInsight/completion/normal/CaseColonAfterStringConstant_after.java

@@ -0,0 +1,8 @@
+class Main {
+  public static final String STRING_CONSTANT = "abc";
+  public static void main(String[] args) {
+    switch (args[0]) {
+        case STRING_CONSTANT:<caret>
+    }
+  }
+}

java/java-tests/testData/codeInsight/completion/normal/UnboxedConstantsInCase_after.java

@@ -1,7 +1,7 @@
 public class Demo {
     void foo(Integer i){
         switch(i) {
-            case Types.CHAR<caret>
+            case Types.CHAR:<caret>
         }
     }
 }

java/java-tests/testSrc/com/intellij/java/codeInsight/completion/NormalCompletionTest.groovy

@@ -1998,4 +1998,6 @@ class Abc {
     myFixture.type('\n')
     checkResult()
   }
+
+  void testCaseColonAfterStringConstant() { doTest() }
 }