Add all dart:html tests from the sdk to test/codegen.

test/codegen_test.dart

 // Copyright (c) 2016, 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.
 
 /// Tests code generation.
 /// Runs Dart Dev Compiler on all input in the `codegen` directory and checks
 /// that the output is what we expected.
 library dev_compiler.test.codegen_test;
 
 import 'dart:convert' show JSON;
@@ skipping 20 matching lines @@
 
 final ArgParser argParser = new ArgParser()
   ..addOption('dart-sdk', help: 'Dart SDK Path', defaultsTo: null);
 
 main(arguments) {
   if (arguments == null) arguments = [];
   ArgResults args = argParser.parse(arguments);
   var filePattern = new RegExp(args.rest.length > 0 ? args.rest[0] : '.');
 
   var expectDir = path.join(inputDir, 'expect');
-  var testDirs = ['language', path.join('lib', 'typed_data')];
+  var testDirs = [
+    'language',
+    path.join('lib', 'typed_data'),
+    path.join('lib', 'html')
+  ];
 
   var multitests = expandMultiTests(testDirs, filePattern);
 
   // Build packages tests depend on
   var compiler = new ModuleCompiler(
       new AnalyzerOptions(customUrlMappings: packageUrlMappings));
 
   group('dartdevc package', () {
     _buildPackages(compiler, expectDir);
 
@@ skipping 169 matching lines @@
   }
   return multitests;
 }
 
 // TODO(jmesserly): switch this to a .packages file.
 final packageUrlMappings = {
   'package:expect/expect.dart': path.join(inputDir, 'expect.dart'),
   'package:async_helper/async_helper.dart':
       path.join(inputDir, 'async_helper.dart'),
   'package:unittest/unittest.dart': path.join(inputDir, 'unittest.dart'),
+  'package:unittest/html_config.dart': path.join(inputDir, 'html_config.dart'),
   'package:js/js.dart': path.join(inputDir, 'packages', 'js', 'js.dart')
 };
 
 final codeCoverage = Platform.environment.containsKey('COVERALLS_TOKEN');
 
 final inputDir = path.join(testDirectory, 'codegen');
 
 Iterable<String> _findTests(String dir, RegExp filePattern) {
   var files = new Directory(dir)
       .listSync()
@@ skipping 41 matching lines @@
 /// Simplified from ParseDartTask.resolveDirective.
 String _resolveDirective(UriBasedDirective directive) {
   StringLiteral uriLiteral = directive.uri;
   String uriContent = uriLiteral.stringValue;
   if (uriContent != null) {
     uriContent = uriContent.trim();
     directive.uriContent = uriContent;
   }
   return directive.validate() == null ? uriContent : null;
 }