Migrate async tests to strong

tests/lib_strong/async/multiple_timer_test.dart

+// Copyright (c) 2012, 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 multiple_timer_test;
+
+import 'dart:async';
+import 'package:unittest/unittest.dart';
+
+const Duration TIMEOUT1 = const Duration(seconds: 1);
+const Duration TIMEOUT2 = const Duration(seconds: 2);
+const Duration TIMEOUT3 = const Duration(milliseconds: 500);
+const Duration TIMEOUT4 = const Duration(milliseconds: 1500);
+
+// The stopwatch is more precise than the Timer.
+// Some browsers (Firefox and IE so far) can trigger too early. So we add more
+// margin. We use identical(1, 1.0) as an easy way to know if the test is
+// compiled by dart2js.
+int get safetyMargin => identical(1, 1.0) ? 100 : 0;
+
+main() {
+  test("multiple timer test", () {
+    Stopwatch _stopwatch1 = new Stopwatch();
+    Stopwatch _stopwatch2 = new Stopwatch();
+    Stopwatch _stopwatch3 = new Stopwatch();
+    Stopwatch _stopwatch4 = new Stopwatch();
+    List<int> _order;
+    int _message;
+
+    void timeoutHandler1() {
+      expect(_stopwatch1.elapsedMilliseconds + safetyMargin,
+             greaterThanOrEqualTo(TIMEOUT1.inMilliseconds));
+      expect(_order[_message], 0);
+      _message++;
+    }
+
+    void timeoutHandler2() {
+      expect(_stopwatch2.elapsedMilliseconds + safetyMargin,
+             greaterThanOrEqualTo(TIMEOUT2.inMilliseconds));
+      expect(_order[_message], 1);
+      _message++;
+    }
+
+    void timeoutHandler3() {
+      expect(_stopwatch3.elapsedMilliseconds + safetyMargin,
+             greaterThanOrEqualTo(TIMEOUT3.inMilliseconds));
+      expect(_order[_message], 2);
+      _message++;
+    }
+
+    void timeoutHandler4() {
+      expect(_stopwatch4.elapsedMilliseconds + safetyMargin,
+             greaterThanOrEqualTo(TIMEOUT4.inMilliseconds));
+      expect(_order[_message], 3);
+      _message++;
+    }
+
+    _order = new List<int>(4);
+    _order[0] = 2;
+    _order[1] = 0;
+    _order[2] = 3;
+    _order[3] = 1;
+    _message = 0;
+
+    _stopwatch1.start();
+    new Timer(TIMEOUT1, expectAsync(timeoutHandler1));
+    _stopwatch2.start();
+    new Timer(TIMEOUT2, expectAsync(timeoutHandler2));
+    _stopwatch3.start();
+    new Timer(TIMEOUT3, expectAsync(timeoutHandler3));
+    _stopwatch4.start();
+    new Timer(TIMEOUT4, expectAsync(timeoutHandler4));
+  });
+}