Enables codegen support in polymer

pkg/polymer/test/build/common.dart

Index: pkg/polymer/test/build/common.dart
diff --git a/pkg/polymer/test/build/common.dart b/pkg/polymer/test/build/common.dart
index 91e6b11a76472965b4f235a83366ee4d9b63cab8..f97ddc09107f4b4231e89e770b4ac1b1b76c8c54 100644
--- a/pkg/polymer/test/build/common.dart
+++ b/pkg/polymer/test/build/common.dart
@@ -36,8 +36,11 @@ class TestHelper implements PackageProvider {
   var resultSubscription;
   var logSubscription;
 
-  Future<Asset> getAsset(AssetId id) =>
-      new Future.value(new Asset.fromString(id, files[idToString(id)]));
+  Future<Asset> getAsset(AssetId id) {
+    var content = files[idToString(id)];
+    if (content == null) fail('error: requested $id, but $id is not available');
+    return new Future.value(new Asset.fromString(id, content));
+  }
 
   TestHelper(List<List<Transformer>> transformers, Map<String, String> files,
       this.messages)
@@ -124,6 +127,10 @@ class TestHelper implements PackageProvider {
 testPhases(String testName, List<List<Transformer>> phases,
     Map<String, String> inputFiles, Map<String, String> expectedFiles,
     [List<String> expectedMessages, bool solo = false]) {
+
+  // Include mock versions of the polymer library that can be used to test
+  // resolver-based code generation.
+  POLYMER_MOCKS.forEach((file, contents) { inputFiles[file] = contents; });
   (solo ? solo_test : test)(testName, () {
     var helper = new TestHelper(phases, inputFiles, expectedMessages)..run();
     return helper.checkAll(expectedFiles).whenComplete(() => helper.tearDown());
@@ -137,3 +144,42 @@ const WEB_COMPONENTS_TAG =
 const INTEROP_TAG = '<script src="packages/browser/interop.js"></script>\n';
 const DART_JS_TAG = '<script src="packages/browser/dart.js"></script>';
 
+const POLYMER_MOCKS = const {
+  'polymer|lib/polymer.dart':
+      'library polymer;\n'
+      'import "dart:html";\n'
+      'export "package:observe/observe.dart";\n' // for @observable
+      'part "src/loader.dart";\n'  // for @CustomTag and @initMethod
+      'part "src/instance.dart";\n', // for @published and @ObserveProperty
+
+  'polymer|lib/src/loader.dart':
+      'part of polymer;\n'
+      'class CustomTag {\n'
+      '  final String tagName;\n'
+      '  const CustomTag(this.tagName);'
+      '}\n'
+      'class InitMethodAnnotation { const InitMethodAnnotation(); }\n'
+      'const initMethod = const InitMethodAnnotation();\n',
+
+  'polymer|lib/src/instance.dart':
+      'part of polymer;\n'
+      'class PublishedProperty { const PublishedProperty(); }\n'
+      'const published = const PublishedProperty();\n'
+      'class ObserveProperty { const ObserveProperty(); }\n'
+      'abstract class Polymer {}\n'
+      'class PolymerElement extends HtmlElement with Polymer {}\n',
+
+  'polymer|lib/init.dart':
+      'library polymer.init;\n'
+      'import "package:polymer/polymer.dart";\n'
+      'main() {};\n',
+
+  'observe|lib/observe.dart':
+      'library observe;\n'
+      'export "src/metadata.dart";',
+
+  'observe|lib/src/metadata.dart':
+      'library observe.src.metadata;\n'
+      'class ObservableProperty { const ObservableProperty(); }\n'
+      'const observable = const ObservableProperty();\n',
+};