Revert "unittest step 3 and 4: remove TestFramework.dart, make test.dart use"

lib/unittest/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.
 
 /** This file is sourced by unitest.dart. */
 
 /**
  * Hooks to configure the unittest library for different platforms. This class
  * implements the API in a platform-independent way. Tests that want to take
  * advantage of the platform can create a subclass and override methods from
@@ skipping 17 matching lines @@
   /**
    * Called when each test is completed. Useful to show intermediate progress on
    * a test suite.
    */
   void onTestResult(TestCase testCase) {}
 
   /**
    * Called with the result of all test cases. The default implementation prints
    * the result summary using the built-in [print] command. Browser tests
    * commonly override this to reformat the output.
-   *
-   * When [uncaughtError] is not null, it contains an error that occured outside
-   * of tests (e.g. setting up the test).
    */
-  void onDone(int passed, int failed, int errors, List<TestCase> results,
-      String uncaughtError) {
+  void onDone(int passed, int failed, int errors, List<TestCase> results) {
     // Print each test's result.
     for (final t in _tests) {
       print('${t.result.toUpperCase()}: ${t.description}');
 
       if (t.message != '') {
         print('  ${t.message}');
       }
     }
 
     // Show the summary.
     print('');
 
     var success = false;
     if (passed == 0 && failed == 0 && errors == 0) {
       print('No tests found.');
       // This is considered a failure too: if this happens you probably have a
       // bug in your unit tests.
-    } else if (failed == 0 && errors == 0 && uncaughtError == null) {
+    } else if (failed == 0 && errors == 0) {
       print('All $passed tests passed.');
       success = true;
     } else {
-      if (uncaughtError != null) {
-        print('Top-level uncaught error: $uncaughtError');
-      }
       print('$passed PASSED, $failed FAILED, $errors ERRORS');
     }
 
     // An exception is used by the test infrastructure to detect failure.
     if (!success) throw new Exception("Some tests failed.");
   }
 }