fixes #221, initial sync*, async, async* implementation

test/testing.dart

Index: test/testing.dart
diff --git a/test/testing.dart b/test/testing.dart
index 353ca3f1035eeef0b49df597674c5c10cf80d0aa..5c66f96a5d4b524a21d6918db0ccb1f493e5cebb 100644
--- a/test/testing.dart
+++ b/test/testing.dart
@@ -11,6 +11,7 @@ import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/engine.dart'
     show AnalysisContext, AnalysisEngine, AnalysisOptionsImpl;
 import 'package:analyzer/src/generated/error.dart';
+import 'package:analyzer/src/generated/source.dart';
 import 'package:cli_util/cli_util.dart' show getSdkDir;
 import 'package:logging/logging.dart';
 import 'package:path/path.dart' as path;
@@ -28,8 +29,18 @@ import 'package:dev_compiler/src/utils.dart';
 
 /// Shared analysis context used for compilation.
 final realSdkContext = createAnalysisContextWithSources(new StrongModeOptions(),
-    new SourceResolverOptions(dartSdkPath: getSdkDir().path))
-  ..analysisOptions = (new AnalysisOptionsImpl()..cacheSize = 512);
+    new SourceResolverOptions(
+        dartSdkPath: getSdkDir().path,
+        customUrlMappings: {
+  'package:expect/expect.dart': _testCodegenPath('expect.dart'),
+  'package:async_helper/async_helper.dart':
+      _testCodegenPath('async_helper.dart'),
+  'package:unittest/unittest.dart': _testCodegenPath('unittest.dart'),
+  'package:dom/dom.dart': _testCodegenPath('sunflower', 'dom.dart')

[vsm, 2015/07/27 21:03:24]

Move out of sunflower?  And perhaps all of these into a custom dir?

[Jennifer Messerly, 2015/07/27 21:46:35]

Good ideas, filed https://github.com/dart-lang/dev_compiler/issues/271

+}))..analysisOptions = (new AnalysisOptionsImpl()..cacheSize = 512);
+
+String _testCodegenPath(String p1, [String p2]) =>
+    path.join(testDirectory, 'codegen', p1, p2);
 
 final String testDirectory =
     path.dirname((reflectClass(_TestUtils).owner as LibraryMirror).uri.path);
@@ -125,12 +136,14 @@ class TestUriResolver extends ResourceUriResolver {
   TestUriResolver(provider)
       : provider = provider,
         super(provider);
-  resolveAbsolute(Uri uri) {
+
+  @override
+  Source resolveAbsolute(Uri uri, [Uri actualUri]) {
     if (uri.scheme == 'package') {
       return (provider.getResource('/packages/' + uri.path) as File)
           .createSource(uri);
     }
-    return super.resolveAbsolute(uri);
+    return super.resolveAbsolute(uri, actualUri);
   }
 }