Unit test changes:

pkg/unittest/lib/unittest.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 library for writing dart unit tests.
  *
  * To import this library, use the pub package manager.
  * Create a pubspec.yaml file in your project and add
  * a dependency on unittest with the following lines:
@@ skipping 755 matching lines @@
 registerException(e, [trace]) {
   _registerException(_currentTest, e, trace);
 }
 
 /**
  * Registers that an exception was caught for the current test.
  */
 _registerException(testNum, e, [trace]) {
   trace = trace == null ? '' : trace.toString();
   if (_tests[testNum].result == null) {
-    String message = (e is ExpectException) ? e.message : 'Caught $e';
+    String message = (e is TestFailure) ? e.message : 'Caught $e';
     _tests[testNum].fail(message, trace);
   } else {
     _tests[testNum].error('Caught $e', trace);
   }
 }
 
 /**
  * Runs a batch of tests, yielding whenever an asynchronous test starts
  * running. Tests will resume executing when such asynchronous test calls
  * [done] or if it fails with an exception.
@@ skipping 35 matching lines @@
       _uncaughtErrorMessage == null);
   _initialized = false;
 }
 
 String _fullSpec(String spec) {
   if (spec == null) return '$_currentGroup';
   return _currentGroup != '' ? '$_currentGroup$groupSep$spec' : spec;
 }
 
 void fail(String message) {
-  throw new ExpectException(message);
+  throw new TestFailure(message);
 }
 
 /**
  * Lazily initializes the test library if not already initialized.
  */
 ensureInitialized() {
   if (_initialized) {
     return;
   }
   _initialized = true;
@@ skipping 41 matching lines @@
   }
 }
 
 /** Enable a test by ID. */
 void enableTest(int testId) => _setTestEnabledState(testId, true);
 
 /** Disable a test by ID. */
 void disableTest(int testId) => _setTestEnabledState(testId, false);
 
 /** Signature for a test function. */
-typedef void TestFunction();
+typedef dynamic TestFunction();