Split the constructors group in element_types_test into multiple files to narrow down timeouts

tests/html/element_types_constructors3_test.dart

Index: tests/html/element_types_constructors3_test.dart
diff --git a/tests/html/element_types_constructors3_test.dart b/tests/html/element_types_constructors3_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..44b98997db85980b53583ea9a7cc8e4fe05eb603
--- /dev/null
+++ b/tests/html/element_types_constructors3_test.dart
@@ -0,0 +1,41 @@
+// Copyright (c) 2012, 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 element_types_constructors3_test;
+
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_individual_config.dart';
+import 'dart:html';
+
+main() {
+  useHtmlIndividualConfiguration();
+
+  check(String name, bool fn(), [bool supported = true]) {
+    test(name, () {
+      var expectation = supported ? returnsNormally : throws;
+      expect(() {
+        expect(fn(), isTrue);
+      }, expectation);
+    });
+  }
+
+  check('li', () => new LIElement() is LIElement);
+  check('label', () => new LabelElement() is LabelElement);
+  check('legen', () => new LegendElement() is LegendElement);
+  check('link', () => new LinkElement() is LinkElement);
+  check('map', () => new MapElement() is MapElement);
+  check('menu', () => new MenuElement() is MenuElement);
+  check('meta', () => new MetaElement() is MetaElement);
+  check('meter',
+      () => new MeterElement() is MeterElement, MeterElement.supported);
+  check('del', () => new Element.tag('del') is ModElement);
+  check('ins', () => new Element.tag('ins') is ModElement);
+  check('object', () => new ObjectElement() is ObjectElement,
+      ObjectElement.supported);
+  check('ol', () => new OListElement() is OListElement);
+  check('optgroup', () => new OptGroupElement() is OptGroupElement);
+  check('option', () => new OptionElement() is OptionElement);
+  check('output',
+      () => new OutputElement() is OutputElement, OutputElement.supported);
+}