pkg/unittest: support up to 6 arguments in expectAsync[Until]

pkg/unittest/test/unittest_expect_async_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 = (TestConfiguration testConfig) {
+  test('expectAsync zero params', () {
+    _defer(expectAsync(() {
+      ++testConfig.count;
+    }));
+  });
+
+  test('expectAsync 1 param', () {
+    var func = expectAsync((arg) {
+      expect(arg, 0);
+      ++testConfig.count;
+    });
+    _defer(() => func(0));
+  });
+
+  test('expectAsync 2 param', () {
+    var func = expectAsync((arg0, arg1) {
+      expect(arg0, 0);
+      expect(arg1, 1);
+      ++testConfig.count;
+    });
+    _defer(() => func(0, 1));
+  });
+
+  test('single arg to Future.catchError', () {
+    var func = expectAsync((error) {
+      expect(error, isStateError);
+      ++testConfig.count;
+    });
+
+    new Future(() {
+      throw new StateError('test');
+    }).catchError(func);
+  });
+
+  test('2 args to Future.catchError', () {
+    var func = expectAsync((error, stack) {
+      expect(error, isStateError);
+      expect(stack is StackTrace, isTrue);
+      ++testConfig.count;
+    });
+
+    new Future(() {
+      throw new StateError('test');
+    }).catchError(func);
+  });
+
+  test('zero of two optional positional args', () {
+    var func = expectAsync(([arg0 = true, arg1 = true]) {
+      expect(arg0, isTrue);
+      expect(arg1, isTrue);
+      ++testConfig.count;
+    });
+
+    _defer(() => func());
+  });
+
+  test('one of two optional positional args', () {
+    var func = expectAsync(([arg0 = true, arg1 = true]) {
+      expect(arg0, isFalse);
+      expect(arg1, isTrue);
+      ++testConfig.count;
+    });
+
+    _defer(() => func(false));
+  });
+
+  test('two of two optional positional args', () {
+    var func = expectAsync(([arg0 = true, arg1 = true]) {
+      expect(arg0, isFalse);
+      expect(arg1, isNull);
+      ++testConfig.count;
+    });
+
+    _defer(() => func(false, null));
+  });
+};
+
+final expected = '8:0:0:8:8:::null:expectAsync zero params:'
+    ':expectAsync 1 param::expectAsync 2 param:'
+    ':single arg to Future.catchError::2 args to Future.catchError:'
+    ':zero of two optional positional args:'
+    ':one of two optional positional args:'
+    ':two of two optional positional args:';