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

tests/isolate/src/MixedTest.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.
 
 // Dart test program for testing that heavy and light isolates can be mixed.
 
 #library('MixedTest');
 #import("dart:isolate");
-#import('TestFramework.dart');
+#import('../../../lib/unittest/unittest.dart');
 
 class IsolateA extends Isolate {
   IsolateA() : super.heavy();
 
   void main() {
     this.port.receive((msg, replyTo) {
       Expect.equals("launch nested!", msg);
       new IsolateB().spawn().then((SendPort p) {
         p.call("alive?").then((msg) {
           Expect.equals("and kicking", msg);
@@ skipping 10 matching lines @@
 
   void main() {
     this.port.receive((msg, replyTo) {
       Expect.equals("alive?", msg);
       replyTo.send("and kicking", null);
       this.port.close();
     });
   }
 }
 
-test(TestExpectation expect) {
-  expect.completes(new IsolateA().spawn()).then((SendPort port) {
-    port.call("launch nested!").then(expect.runs1((msg) {
-      Expect.equals(499, msg);
-      expect.succeeded();
+main() {
+  test("light isolate can spawn heavy isolate", () {
+    new IsolateA().spawn().then(expectAsync1((SendPort port) {
+      port.call("launch nested!").then(expectAsync1((msg) {
+        Expect.equals(499, msg);
+      }));
     }));
   });
 }
-
-main() {
-  runTests([test]);
-}