pkg/unittest: much cleaner support for arbitrary args in expectAsync functions

pkg/unittest/test/unittest_expect_async_args_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 testName = 'completion test';
+var testName = 'expect async args';
 
 var testFunction = (TestConfiguration testConfig) {
+  List<int> _getArgs([a = 0, b = 0, c = 0, d = 0, e = 0, f = 0]) {
+    testConfig.count++;
+    return [a, b, c, d, e, f];
+  }
+
   test(testName, () {
-    var _callback;
-    _callback = expectAsyncUntil0(() {
-      if (++testConfig.count < 10) {
-        _defer(_callback);
-      }
-    },
-    () => (testConfig.count == 10));
-    _defer(_callback);
+    expect(expectAsync(_getArgs)(), [0, 0, 0, 0, 0, 0]);
+    expect(expectAsync(_getArgs)(5), [5, 0, 0, 0, 0, 0]);
+    expect(expectAsync(_getArgs)(1, 2, 3, 4, 5, 6), [1, 2, 3, 4, 5, 6]);

[Siggi Cherem (dart-lang), 2014/03/05 19:09:18]

what happens if you call it with 7 args (one more than you declared)?

[kevmoo, 2014/03/05 21:41:26]

I added a test for too many args passed and providing a method with too many
args.

Both fail.

   });
 };
 
-var expected = buildStatusString(1, 0, 0, testName, count: 10);
+var expected = buildStatusString(1, 0, 0, testName, count: 3);