Test for ddc async call timing

tests/language_strong/async_call_test.dart

Index: tests/language_strong/async_call_test.dart
diff --git a/tests/language_strong/async_call_test.dart b/tests/language_strong/async_call_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..3bddf879d38a9a5131234b3cba958c16036b8f37
--- /dev/null
+++ b/tests/language_strong/async_call_test.dart
@@ -0,0 +1,28 @@
+// Copyright (c) 2017, 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 "dart:async";
+import "package:expect/expect.dart";
+
+var result = "";
+
+foo() {
+  result += "foo";
+}
+
+bar() async {
+  result += "bar";
+}
+
+main() async {
+  var f = new Future(foo);
+  var b = bar();
+  Expect.equals("", result);
+  scheduleMicrotask(() => result += "micro");
+  await b;
+  await f;
+
+  // Validates that bar is scheduled as a microtask, before foo.
+  Expect.equals("barmicrofoo", result);
+}