Partial backport of analyzer async/await fixes to Java.

editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/StaticWarningCodeTest.java

 /*
  * Copyright (c) 2013, the Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  * 
  * http://www.eclipse.org/legal/epl-v10.html
  * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
  * or implied. See the License for the specific language governing permissions and limitations under
  * the License.
  */
 package com.google.dart.engine.resolver;
 
 import com.google.dart.engine.error.AnalysisError;
 import com.google.dart.engine.error.CompileTimeErrorCode;
 import com.google.dart.engine.error.ErrorCode;
 import com.google.dart.engine.error.HintCode;
 import com.google.dart.engine.error.StaticTypeWarningCode;
 import com.google.dart.engine.error.StaticWarningCode;
 import com.google.dart.engine.source.Source;
 
 public class StaticWarningCodeTest extends ResolverTestCase {
+  public void fail_returnWithoutValue_async() throws Exception {
+    // TODO(paulberry): Some async/await type checking has not yet been fully backported from dart.
+    // See dartbug.com/22252.
+    Source source = addSource(createSource(//
+        "import 'dart:async';",
+        "Future<int> f() async {",
+        "  return;",
+        "}"));
+    resolve(source);
+    assertErrors(source, StaticWarningCode.RETURN_WITHOUT_VALUE);
+    verify(source);
+  }
+
   public void fail_undefinedGetter() throws Exception {
     Source source = addSource(createSource(//
     // TODO
     ));
     resolve(source);
     assertErrors(source, StaticWarningCode.UNDEFINED_GETTER);
     verify(source);
   }
 
   public void fail_undefinedIdentifier_commentReference() throws Exception {
@@ skipping 3161 matching lines @@
   public void test_voidReturnForGetter() throws Exception {
     Source source = addSource(createSource(//
         "class S {",
         "  void get value {}",
         "}"));
     resolve(source);
     assertErrors(source, StaticWarningCode.VOID_RETURN_FOR_GETTER);
   }
 
 }