Support for-in in analyzer2dart.

pkg/analyzer2dart/test/end2end_data.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.
 
 /// Test data for the end2end test.
 library test.end2end.data;
 
 import 'test_helper.dart' show Group;
 import 'test_helper.dart' as base show TestSpec;
 
@@ skipping 627 matching lines @@
   }
 }''', '''
 main() {
   var i = 0;
   while (i < 10) {
     print(i);
     ++i;
   }
 }'''),
   ]),
+
+  const Group('For in loop', const <TestSpec>[
+// TODO(johnniwinther): Add tests for `i` as top-level, static and instance
+// fields.
+    const TestSpec('''
+main(a) {
+  for (var i in a) {
+    print(i);
+  }
+}
+''', '''
+main(a) {
+  var v0 = a.iterator;
+  while (v0.moveNext()) {
+    print(v0.current);
+  }
+}'''),
+
+    const TestSpec('''
+main(a) {
+  for (var i in a) {
+    print(i);
+    i = 0;
+    print(i);
+  }
+}
+''', '''
+main(a) {
+  var v0 = a.iterator, i;
+  while (v0.moveNext()) {
+    i = v0.current;
+    print(i);
+    i = 0;
+    print(i);
+  }
+}
+'''),
+
+    const TestSpec('''
+main(a) {
+  var i;
+  for (i in a) {
+    print(i);
+  }
+}
+''', '''
+main(a) {
+  var i, v0 = a.iterator;
+  while (v0.moveNext()) {
+    i = v0.current;
+    print(i);
+  }
+}
+'''),
+  ]),
 ];