More analyzer updates, and handle negative_tests

test/testing.dart

 // Copyright (c) 2015, 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 dev_compiler.src.testing;
 
 import 'dart:mirrors';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
-import 'package:analyzer/src/generated/engine.dart'
-    show AnalysisContext, AnalysisEngine, AnalysisOptionsImpl;
 import 'package:analyzer/src/generated/source.dart';
-import 'package:cli_util/cli_util.dart' show getSdkDir;
 import 'package:path/path.dart' as path;
 
-import 'package:dev_compiler/src/analysis_context.dart';
-import 'package:dev_compiler/src/options.dart';
-
-/// Shared analysis context used for compilation.
-final AnalysisContext realSdkContext = () {
-  var context = createAnalysisContextWithSources(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')
-      }));
-  (context.analysisOptions as AnalysisOptionsImpl).cacheSize = 512;
-  return context;
-}();
-
-String _testCodegenPath(String p1, [String p2]) =>
-    path.join(testDirectory, 'codegen', p1, p2);
-
 final String testDirectory =
     path.dirname((reflectClass(_TestUtils).owner as LibraryMirror).uri.path);
 
 class _TestUtils {}
 
 class TestUriResolver extends ResourceUriResolver {
   final MemoryResourceProvider provider;
   TestUriResolver(provider)
       : provider = provider,
         super(provider);
 
   @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, actualUri);
   }
 }