Add JsInitializerGenerator

test/transformer/entry_point_transformer_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 js.test.transformer.entry_point_transformer_test;
 
 import 'package:code_transformers/src/test_harness.dart';
 import 'package:js/src/transformer/entry_point_transformer.dart';
 import 'package:js/src/transformer/library_transformer.dart';
 import 'package:unittest/unittest.dart';
 
 import 'utils.dart';
+import 'dart:async';
 
 main() {
 
   group('EntryPointTransformer', () {
 
     test('runs', () {
       var resolvers = mockResolvers();
       var libraryTransformer = new LibraryTransformer(resolvers);
       var entryPointTransformer = new EntryPointTransformer(resolvers);
       var testHelper = new TestHelper([
           [libraryTransformer],
           [entryPointTransformer]], {
         'test|lib/library.dart': readTestFile('library.dart'),
         'test|web/entry_point.dart': readTestFile('entry_point.dart.test'),
         'js|lib/js.dart': readJsPackageFile('js.dart'),
         'js|lib/src/js_impl.dart': readJsPackageFile('src/js_impl.dart'),
         'js|lib/src/metadata.dart': readJsPackageFile('src/metadata.dart'),
       }, null);
       testHelper.run();
-      return testHelper['test|web/entry_point.dart'].then((testSource) {
-         expect(testSource, contains(
+
+      return Future.wait([
+          testHelper['test|web/entry_point.dart'],
+          testHelper['test|web/entry_point.dart_initialize.js'],
+      ])
+      .then((sources) {
+        var dartSource = sources[0];
+        var jsSource = sources[1];
+        expect(dartSource, contains(
 '''
 initializeJavaScript() {
   _js__test__web_entry_point_dart__init_js___dart.initializeJavaScriptLibrary();
   _js__test__lib_library_dart__init_js___dart.initializeJavaScriptLibrary();
 }
 '''));
       });
     });
   });
 }