Issue 21740. Allow inlining local variables declared in SwitchCase.

pkg/analysis_server/test/services/refactoring/inline_local_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.services.refactoring.inline_local;
 
 import 'package:analysis_server/src/protocol.dart' hide Element;
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/refactoring/inline_local.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
@@ skipping 150 matching lines @@
 class A {
   foo() {}
   bar() {}
 }
 main() {
   (new A()..foo()).bar();
 }
 ''');
   }
 
+  test_OK_inSwitchCase() {
+    indexTestUnit('''
+main(int p) {
+  switch (p) {
+    case 0:
+      int test = 42;
+      print(test);
+      break;
+  }
+}
+''');
+    _createRefactoring('test =');
+    // validate change
+    return assertSuccessfulRefactoring('''
+main(int p) {
+  switch (p) {
+    case 0:
+      print(42);
+      break;
+  }
+}
+''');
+  }
+
   test_OK_intoStringInterpolation_binaryExpression() {
     indexTestUnit(r'''
 main() {
   int test = 1 + 2;
   print('test = $test');
   print('test = ${test}');
   print('test = ${process(test)}');
 }
 process(x) {}
 ''');
@@ skipping 379 matching lines @@
         RefactoringProblemSeverity.FATAL,
         expectedMessage: 'Local variable declaration or reference must be '
             'selected to activate this refactoring.');
   }
 
   void _createRefactoring(String search) {
     int offset = findOffset(search);
     refactoring = new InlineLocalRefactoring(searchEngine, testUnit, offset);
   }
 }