Migrate async tests to strong

tests/lib_strong/async/schedule_microtask_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.
+
+import 'package:async_helper/async_helper.dart';
+import "package:expect/expect.dart";
+import 'dart:async';
+
+
+Future testOneScheduleMicrotask() {
+  var completer = new Completer();
+  Timer.run(() {
+    scheduleMicrotask(completer.complete);
+  });
+  return completer.future;
+}
+
+
+Future testMultipleScheduleMicrotask() {
+  var completer = new Completer();
+  Timer.run(() {
+    const TOTAL = 10;
+    int done = 0;
+    for (int i = 0; i < TOTAL; i++) {
+      scheduleMicrotask(() {
+        done++;
+        if (done == TOTAL) completer.complete();;
+      });
+    }
+  });
+  return completer.future;
+}
+
+
+Future testScheduleMicrotaskThenTimer() {
+  var completer = new Completer();
+  Timer.run(() {
+    bool scheduleMicrotaskDone = false;
+    scheduleMicrotask(() {
+      Expect.isFalse(scheduleMicrotaskDone);
+      scheduleMicrotaskDone = true;
+    });
+    Timer.run(() {
+      Expect.isTrue(scheduleMicrotaskDone);
+      completer.complete();
+    });
+  });
+  return completer.future;
+}
+
+
+Future testTimerThenScheduleMicrotask() {
+  var completer = new Completer();
+  Timer.run(() {
+    bool scheduleMicrotaskDone = false;
+    Timer.run(() {
+      Expect.isTrue(scheduleMicrotaskDone);
+      completer.complete();
+    });
+    scheduleMicrotask(() {
+      Expect.isFalse(scheduleMicrotaskDone);
+      scheduleMicrotaskDone = true;
+    });
+  });
+  return completer.future;
+}
+
+
+Future testTimerThenScheduleMicrotaskChain() {
+  var completer = new Completer();
+  Timer.run(() {
+    const TOTAL = 10;
+    int scheduleMicrotaskDone = 0;
+    Timer.run(() {
+      Expect.equals(TOTAL, scheduleMicrotaskDone);
+      completer.complete();
+    });
+    Future scheduleMicrotaskCallback() {
+      scheduleMicrotaskDone++;
+      if (scheduleMicrotaskDone != TOTAL) {
+        scheduleMicrotask(scheduleMicrotaskCallback);
+      }
+    }
+    scheduleMicrotask(scheduleMicrotaskCallback);
+  });
+  return completer.future;
+}
+
+
+main() {
+  asyncStart();
+  testOneScheduleMicrotask()
+    .then((_) => testMultipleScheduleMicrotask())
+    .then((_) => testScheduleMicrotaskThenTimer())
+    .then((_) => testTimerThenScheduleMicrotask())
+    .then((_) => testTimerThenScheduleMicrotaskChain())
+    .then((_) => asyncEnd());
+}
+