disable wrap with fixes in switch cases where only constants are accepted (IDEA-196151)

java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/WrapExpressionFix.java

@@ -105,6 +105,7 @@ public class WrapExpressionFix implements IntentionAction {
   public boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) {
     return myExpression.isValid()
            && myExpression.getManager().isInProject(myExpression)
+           && !(myExpression.getParent() instanceof PsiSwitchLabelStatement)
            && myExpectedType != null
            && myExpectedType.isValid()
            && myExpression.getType() != null

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/wrapExpression/beforeSwitchCaseJava7.java

@@ -0,0 +1,9 @@
+// "Wrap using 'String.valueOf()'" "false"
+public class Test {
+  void foo(String i) {
+    switch (i) {
+      case '<caret>0':
+        System.out.println(i);
+    }
+  }
+}

java/java-tests/testSrc/com/intellij/java/codeInsight/daemon/quickFix/WrapExpressionFixTest.java

@@ -20,7 +20,7 @@ import com.intellij.pom.java.LanguageLevel;
 
 public class WrapExpressionFixTest extends LightQuickFixParameterizedTestCase {
   @Override
-  protected LanguageLevel getLanguageLevel() {
+  protected LanguageLevel getDefaultLanguageLevel() {
     return LanguageLevel.JDK_1_6;
   }