Add support for setUpAll and tearDownAll.

lib/src/runner/browser/iframe_listener.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.iframe_listener;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:html' hide Metadata;
 
@@ skipping 113 matching lines @@
 
   /// Send information about [_suite] across [channel] and start listening for
   /// commands to run the tests.
   void _listen(MultiChannel channel) {
     channel.sink.add({
       "type": "success",
       "root": _serializeGroup(channel, _suite.group)
     });
   }
 
-  /// Serializes [entries] into a JSON-safe map.
+  /// Serializes [group] into a JSON-safe map.
   Map _serializeGroup(MultiChannel channel, Group group) {
     return {
       "type": "group",
       "name": group.name,
       "metadata": group.metadata.serialize(),
+      "setUpAll": _serializeTest(channel, group.setUpAll),
+      "tearDownAll": _serializeTest(channel, group.tearDownAll),
       "entries": group.entries.map((entry) {
-        if (entry is Group) return _serializeGroup(channel, entry);
+        return entry is Group
+            ? _serializeGroup(channel, entry)
+            : _serializeTest(channel, entry);
+      }).toList()
+    };
+  }
 
-        var test = entry as Test;
-        var testChannel = channel.virtualChannel();
-        testChannel.stream.listen((message) {
-          assert(message['command'] == 'run');
-          _runTest(test, channel.virtualChannel(message['channel']));
-        });
+  /// Serializes [test] into a JSON-safe map.
+  ///
+  /// Returns `null` if [test] is `null`.
+  Map _serializeTest(MultiChannel channel, Test test) {
+    if (test == null) return null;
 
-        return {
-          "type": "test",
-          "name": test.name,
-          "metadata": test.metadata.serialize(),
-          "channel": testChannel.id
-        };
-      }).toList()
+    var testChannel = channel.virtualChannel();
+    testChannel.stream.listen((message) {
+      assert(message['command'] == 'run');
+      _runTest(test, channel.virtualChannel(message['channel']));
+    });
+
+    return {
+      "type": "test",
+      "name": test.name,
+      "metadata": test.metadata.serialize(),
+      "channel": testChannel.id
     };
   }
 
   /// Runs [test] and sends the results across [channel].
   void _runTest(Test test, MultiChannel channel) {
     var liveTest = test.load(_suite);
 
     channel.stream.listen((message) {
       assert(message['command'] == 'close');
       liveTest.close();
@@ skipping 16 matching lines @@
     });
 
     liveTest.onPrint.listen((line) {
       print(line);
       channel.sink.add({"type": "print", "line": line});
     });
 
     liveTest.run().then((_) => channel.sink.add({"type": "complete"}));
   }
 }