Adding support checks for WebSocket.

tests/html/websocket_test.dart

Index: tests/html/websocket_test.dart
diff --git a/tests/html/websocket_test.dart b/tests/html/websocket_test.dart
index 982afa42bb1cd434c1f6eeed047e468656723d18..1738ecec8e1769f5d690c7252fca7d125a1e565d 100644
--- a/tests/html/websocket_test.dart
+++ b/tests/html/websocket_test.dart
@@ -1,17 +1,28 @@
 library WebSocketTest;
 import '../../pkg/unittest/lib/unittest.dart';
-import '../../pkg/unittest/lib/html_config.dart';
+import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:html';
 
 main() {
 
-  useHtmlConfiguration();
+  useHtmlIndividualConfiguration();
 
-  var isWebSocket = predicate((x) => x is WebSocket, 'is a WebSocket');
+  group('supported', () {
+    test('supported', () {
+      expect(WebSocket.supported, true);
+    });
+  });
+
+  group('websocket', () {
+    var isWebSocket = predicate((x) => x is WebSocket, 'is a WebSocket');
+    var expectation = WebSocket.supported ? returnsNormally : throws;
 
-  test('constructorTest', () {
-      var socket = new WebSocket('ws://localhost');
-      expect(socket, isNotNull);
-      expect(socket, isWebSocket);
+    test('constructorTest', () {
+      expect(() {
+        var socket = new WebSocket('ws://localhost');
+        expect(socket, isNotNull);
+        expect(socket, isWebSocket);
+        }, expectation);
+    });
   });
 }