Refactor groups to pipe them through to the runner.

lib/src/runner/browser/browser_manager.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 test.runner.browser.browser_manager;
 
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:async/async.dart';
 import 'package:http_parser/http_parser.dart';
 import 'package:pool/pool.dart';
 
+import '../../backend/group.dart';
 import '../../backend/metadata.dart';
+import '../../backend/suite_entry.dart';
 import '../../backend/test_platform.dart';
 import '../../util/cancelable_future.dart';
 import '../../util/multi_channel.dart';
 import '../../util/remote_exception.dart';
 import '../../util/stack_trace_mapper.dart';
 import '../../utils.dart';
 import '../application_exception.dart';
 import '../environment.dart';
 import '../load_exception.dart';
 import '../runner_suite.dart';
@@ skipping 209 matching lines @@
     }
 
     if (response["type"] == "error") {
       closeIframe();
       var asyncError = RemoteException.deserialize(response["error"]);
       await new Future.error(
           new LoadException(path, asyncError.error),
           asyncError.stackTrace);
     }
 
-    return new RunnerSuite(await _environment, response["tests"].map((test) {
-      var testMetadata = new Metadata.deserialize(test['metadata']);
-      var testChannel = suiteChannel.virtualChannel(test['channel']);
-      return new IframeTest(test['name'], testMetadata, testChannel,
-          mapper: mapper);
-    }), platform: _platform, metadata: metadata, path: path,
+    return new RunnerSuite(
+        await _environment,
+        _deserializeEntries(suiteChannel, mapper, response["entries"]),
+        platform: _platform,
+        metadata: metadata,
+        path: path,
         onClose: () => closeIframe());
   }
 
+  /// Deserializes [entries] into concrete [SuiteEntry] subclasses.
+  Iterable<SuiteEntry> _deserializeEntries(MultiChannel suiteChannel,
+      Mapper mapper, List<Map> entries) {
+    return entries.map((entry) {
+      var metadata = new Metadata.deserialize(entry['metadata']);
+      if (entry['type'] == 'group') {
+        return new Group(
+            entry['name'],
+            metadata,
+            _deserializeEntries(suiteChannel, mapper, entry['entries']));
+      } else {
+        var testChannel = suiteChannel.virtualChannel(entry['channel']);
+        return new IframeTest(entry['name'], metadata, testChannel,
+            mapper: mapper);
+      }
+    });
+  }
+
   /// An implementation of [Environment.displayPause].
   CancelableFuture _displayPause() {
     if (_pauseCompleter != null) return _pauseCompleter.future;
 
     _pauseCompleter = new CancelableCompleter(() {
       _channel.sink.add({"command": "resume"});
       _pauseCompleter = null;
     });
 
     _channel.sink.add({"command": "displayPause"});
@@ skipping 28 matching lines @@
 
   final Uri observatoryUrl;
 
   final Uri remoteDebuggerUrl;
 
   _BrowserEnvironment(this._manager, this.observatoryUrl,
       this.remoteDebuggerUrl);
 
   CancelableFuture displayPause() => _manager._displayPause();
 }