Adding supported checks & test for SpeechRecognition APIs.

tests/html/speechrecognition_test.dart

+// Copyright (c) 2013, 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 speech_recognition_test;
+import '../../pkg/unittest/lib/unittest.dart';
+import '../../pkg/unittest/lib/html_individual_config.dart';
+import 'dart:html';
+
+main() {
+  useHtmlIndividualConfiguration();
+
+  group('supported', () {
+    test('supported', () {
+      expect(SpeechRecognition.supported, true);
+    });
+  });
+
+  group('types', () {
+    var expectation = SpeechRecognition.supported ? returnsNormally : throws;
+
+    test('SpeechRecognition', () {
+      expect(() {
+        new SpeechRecognition();
+      }, expectation);
+    });
+
+    test('SpeechRecognitionEvent', () {
+      expect(() {
+        document.$dom_createEvent('SpeechRecognitionEvent');

[Emily Fortuna, 2013/01/19 01:24:58]

can we make this test a little more functional? 

[blois, 2013/01/19 01:46:39]

Added a little more, but there isn't too much we can do with these since they
aren't really intended to be created manually.

This is essentially cloning what the event_test was doing for the events.

+      }, expectation);
+    });
+
+    test('SpeechRecognitionError', () {
+      expect(() {
+        document.$dom_createEvent('SpeechRecognitionError');
+      }, expectation);
+    });
+  });
+}
+