feat(dart/transform) Allow ctor stubs to be tree shaken

Change the method used to discover Directive annotated classes to ensure
that the Dart code can be tree shaken.

Closes #497

Closes $\x23736

modules/angular2/test/transform/common.dart

@@ -0,0 +1,14 @@
+// Copyright (c) 2013, 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 angular2.test.transform;
+
+import 'dart:async';
+
+/// Mocked out version of [bootstrap], defined in application.dart. Importing
+/// the actual file in tests causes issues with resolution due to its
+/// transitive dependencies.
+Future bootstrap(Type appComponentType, [List<Binding> bindings = null,
+    Function givenBootstrapErrorReporter = null]) {
+  return null;
+}

modules/angular2/test/transform/html_entry_point_files/index.dart

@@ -1,5 +1,6 @@
 library web_foo;
 
 import 'package:angular2/src/core/annotations/annotations.dart';
+import 'package:angular2/src/core/application.dart';
 
 void main() {}

modules/angular2/test/transform/list_of_types_files/index.dart

@@ -1,7 +1,8 @@
 library web_foo;
 
+import 'package:angular2/src/core/application.dart';
 import 'bar.dart';
 
 void main() {
-  new Component('Things');
+  bootstrap(MyComponent);
 }

modules/angular2/test/transform/simple_annotation_files/index.dart

@@ -1,7 +1,8 @@
 library web_foo;
 
+import 'package:angular2/src/core/application.dart';
 import 'bar.dart';
 
 void main() {
-  new MyComponent('Things');
+  bootstrap(MyComponent);
 }

modules/angular2/test/transform/synthetic_ctor_files/index.dart

@@ -1,7 +1,8 @@
 library web_foo;
 
+import 'package:angular2/src/core/application.dart';
 import 'bar.dart';
 
 void main() {
-  new MyComponent();
+  bootstrap(MyComponent);
 }

modules/angular2/test/transform/transform_test.dart

@@ -17,7 +17,7 @@ main() {
 }
 
 var formatter = new DartFormatter();
-var transform = new AngularTransformer(new TransformerOptions(
+var transform = new AngularTransformer(new TransformerOptions('web/index.dart',
     'web/index.dart', 'web/index.bootstrap.dart', 'web/index.html'));
 
 class TestConfig {
@@ -40,7 +40,8 @@ void _runTests() {
       'a|web/index.html': 'common.html',
       'a|web/index.dart': 'html_entry_point_files/index.dart',
       'angular2|lib/src/core/annotations/annotations.dart':
-          '../../lib/src/core/annotations/annotations.dart'
+          '../../lib/src/core/annotations/annotations.dart',
+      'angular2|lib/src/core/application.dart': 'common.dart'
     },
         outputs: {
       'a|web/index.html': 'html_entry_point_files/expected/index.html'
@@ -51,7 +52,8 @@ void _runTests() {
       'a|web/index.dart': 'simple_annotation_files/index.dart',
       'a|web/bar.dart': 'simple_annotation_files/bar.dart',
       'angular2|lib/src/core/annotations/annotations.dart':
-          '../../lib/src/core/annotations/annotations.dart'
+          '../../lib/src/core/annotations/annotations.dart',
+      'angular2|lib/src/core/application.dart': 'common.dart'
     },
         outputs: {
       'a|web/index.bootstrap.dart':
@@ -64,7 +66,8 @@ void _runTests() {
       'a|web/foo.dart': 'two_deps_files/foo.dart',
       'a|web/bar.dart': 'two_deps_files/bar.dart',
       'angular2|lib/src/core/annotations/annotations.dart':
-          '../../lib/src/core/annotations/annotations.dart'
+          '../../lib/src/core/annotations/annotations.dart',
+      'angular2|lib/src/core/application.dart': 'common.dart'
     },
         outputs: {
       'a|web/index.bootstrap.dart':
@@ -77,7 +80,8 @@ void _runTests() {
       'a|web/foo.dart': 'list_of_types_files/foo.dart',
       'a|web/bar.dart': 'list_of_types_files/bar.dart',
       'angular2|lib/src/core/annotations/annotations.dart':
-          '../../lib/src/core/annotations/annotations.dart'
+          '../../lib/src/core/annotations/annotations.dart',
+      'angular2|lib/src/core/application.dart': 'common.dart'
     },
         outputs: {
       'a|web/index.bootstrap.dart':
@@ -89,12 +93,28 @@ void _runTests() {
       'a|web/index.dart': 'synthetic_ctor_files/index.dart',
       'a|web/bar.dart': 'synthetic_ctor_files/bar.dart',
       'angular2|lib/src/core/annotations/annotations.dart':
-          '../../lib/src/core/annotations/annotations.dart'
+          '../../lib/src/core/annotations/annotations.dart',
+      'angular2|lib/src/core/application.dart': 'common.dart'
     },
         outputs: {
       'a|web/index.bootstrap.dart':
           'synthetic_ctor_files/expected/index.bootstrap.dart'
-    })
+    }),
+    new TestConfig('Component with two annotations',
+        inputs: {
+      'a|web/index.html': 'common.html',
+      'a|web/index.dart': 'two_annotations_files/index.dart',
+      'a|web/bar.dart': 'two_annotations_files/bar.dart',
+      'angular2|lib/src/core/annotations/annotations.dart':
+          '../../lib/src/core/annotations/annotations.dart',
+      'angular2|lib/src/core/annotations/template.dart':
+          '../../lib/src/core/annotations/template.dart',
+      'angular2|lib/src/core/application.dart': 'common.dart'
+    },
+        outputs: {
+      'a|web/index.bootstrap.dart':
+          'two_annotations_files/expected/index.bootstrap.dart'
+    }),
   ];
 
   var cache = {};

modules/angular2/test/transform/two_annotations_files/bar.dart

@@ -0,0 +1,10 @@
+library bar;
+
+import 'package:angular2/src/core/annotations/annotations.dart';
+import 'package:angular2/src/core/annotations/template.dart';
+
+@Component(selector: '[soup]')
+@Template(inline: 'Salad')
+class MyComponent {
+  MyComponent();
+}

modules/angular2/test/transform/two_annotations_files/expected/index.bootstrap.dart

@@ -0,0 +1,18 @@
+import 'package:angular2/src/reflection/reflection.dart' show reflector;
+import 'bar.dart' as i0;
+import 'package:angular2/src/core/annotations/annotations.dart' as i1;
+import 'package:angular2/src/core/annotations/template.dart' as i2;
+import 'index.dart' as i3;
+
+main() {
+  reflector
+    ..registerType(i0.MyComponent, {
+      "factory": () => new i0.MyComponent(),
+      "parameters": const [const []],
+      "annotations": const [
+        const i1.Component(selector: '[soup]'),
+        const i2.Template(inline: 'Salad')
+      ]
+    });
+  i3.main();
+}

modules/angular2/test/transform/two_annotations_files/index.dart

@@ -0,0 +1,8 @@
+library web_foo;
+
+import 'package:angular2/src/core/application.dart';
+import 'bar.dart';
+
+void main() {
+  bootstrap(MyComponent);
+}

modules/angular2/test/transform/two_deps_files/expected/index.bootstrap.dart

@@ -10,9 +10,7 @@ main() {
       "factory":
           (i1.MyContext c, String inValue) => new i0.MyComponent(c, inValue),
       "parameters": const [const [i1.MyContext, String]],
-      "annotations": const [
-        const i2.Component(selector: i1.preDefinedSelector)
-      ]
+      "annotations": const [const i2.Component(selector: i1.preDefinedSelector)]
     });
   i3.main();
 }

modules/angular2/test/transform/two_deps_files/index.dart

@@ -1,7 +1,8 @@
 library web_foo;
 
+import 'package:angular2/src/core/application.dart';
 import 'bar.dart';
 
 void main() {
-  new MyComponent('Things');
+  bootstrap(MyComponent);
 }