Issue 25622. Quick fix for 'async-for'.

pkg/analysis_server/test/services/correction/fix_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.correction.fix;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/edit/fix/fix_core.dart';
 import 'package:analysis_server/plugin/edit/fix/fix_dart.dart';
@@ skipping 331 matching lines @@
         r'''
 // Comment first.
 // Comment second.
 
 part of my.lib;
 
 class A {}
 ''');
   }
 
+  test_addSync_asyncFor() async {
+    resolveTestUnit('''
+import 'dart:async';
+main(Stream<String> names) {
+  await for (String name in names) {
+    print(name);
+  }
+}
+''');
+    await assertHasFix(
+        DartFixKind.ADD_ASYNC,
+        '''
+import 'dart:async';
+main(Stream<String> names) async {
+  await for (String name in names) {
+    print(name);
+  }
+}
+''');
+  }
+
   test_addSync_BAD_nullFunctionBody() async {
     resolveTestUnit('''
 var F = await;
 ''');
     await assertNoFix(DartFixKind.ADD_ASYNC);
   }
 
   test_addSync_blockFunctionBody() async {
     resolveTestUnit('''
 foo() {}
@@ skipping 4452 matching lines @@
       int offset = resultCode.indexOf(search);
       positions.add(new Position(testFile, offset));
     }
     return positions;
   }
 
   void _performAnalysis() {
     while (context.performAnalysisTask().hasMoreWork);
   }
 }