pkg/unittest: more lock-down, cleanup

pkg/unittest/test/unittest_async_exception2_test.dart

+// Copyright (c) 2013, 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 unittestTest;
+import 'dart:isolate';
+import 'dart:async';
+import 'package:unittest/unittest.dart';
+
+part 'unittest_test_utils.dart';
+
+var testFunction = (_) {
+  test('protectAsync0', () {
+    var protected = protectAsync0(() {
+      throw new StateError('error during protectAsync0');
+    });
+    new Future(protected);
+  });
+
+  test('protectAsync1', () {
+    var protected = protectAsync1((arg) {
+      throw new StateError('error during protectAsync1: $arg');
+    });
+    new Future(() => protected('one arg'));
+  });
+
+  test('protectAsync2', () {
+    var protected = protectAsync2((arg1, arg2) {
+      throw new StateError('error during protectAsync2: $arg1, $arg2');
+    });
+    new Future(() => protected('arg1', 'arg2'));
+  });
+
+  test('throw away 1', () {
+    return new Future(() {});
+  });
+};
+
+var expected = '1:0:3:4:0:::null:'
+  'protectAsync0:Callback called (1) after test case protectAsync0 has already been marked as pass.:'
+  'protectAsync1:Callback called (1) after test case protectAsync1 has already been marked as pass.:'
+  'protectAsync2:Callback called (1) after test case protectAsync2 has already been marked as pass.:'
+  'throw away 1:';