Run large html tests individually.

pkg/unittest/html_individual_config.dart

+// Copyright (c) 2011, 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.
+
+/**
+ * A unit test library for running subtests one at a time in a browser,
+ * especially used for large tests files that have many subtests, so we can mark
+ * subtests as failing at a finer granularity than the entire test file.
+ *
+ * To use, import this file, and call [useHtmlIndividualConfiguration] at the
+ * start of your set sequence.
+ */
+#library('unittest');
+
+#import('unittest.dart', prefix: 'unittest_file');
+#import('html_config.dart', prefix: 'htmlconfig');
+#import('dart:html');
+
+class HtmlIndividualConfiguration extends htmlconfig.HtmlConfiguration {
+
+  String _noSuchTest = ''; 
+  HtmlIndividualConfiguration(isLayoutTest): super(isLayoutTest);
+
+  void onStart() {
+    var testName = window.location.hash;
+    if (testName != '') {
+      try {
+        testName = testName.substring(1); // cut off the #
+        unittest_file.filterTests('$testName\$');
+      } catch (e) {
+        print('tried to match "$testName"');
+        for (TestCase c in unittest_file.testCases)
+          print('test case ${c.description}');
+        print('NO_SUCH_TEST');
+        exit(1);
+      }
+    }
+    super.onStart();
+  }
+}
+
+void useHtmlIndividualConfiguration([bool isLayoutTest = false]) {
+  unittest_file.configure(new HtmlIndividualConfiguration(isLayoutTest));
+}