Fix tests that use a 0-length timeout.

test/runner/runner_test.dart

 // Copyright (c) 2015, 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.
 
 @TestOn("vm")
 
 import 'dart:io';
 import 'dart:math' as math;
 
 import 'package:scheduled_test/descriptor.dart' as d;
@@ skipping 384 matching lines @@
       test.shouldExit(0);
     });
 
     test("respects matching Timeouts", () {
       d.file("test.dart", '''
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
-  test("fail", () => throw 'oh no', onPlatform: {
-    "vm": new Timeout(new Duration(seconds: 0))
+  test("fail", () async {
+    await new Future.delayed(Duration.ZERO);
+    throw 'oh no';
+  }, onPlatform: {
+    "vm": new Timeout(Duration.ZERO)
   });
 }
 ''').create();
 
       var test = runTest(["test.dart"]);
       test.stdout.expect(containsInOrder([
         "Test timed out after 0 seconds.",
         "-1: Some tests failed."
       ]));
       test.shouldExit(1);
@@ skipping 85 matching lines @@
       d.file("test.dart", '''
 @OnPlatform(const {
   "vm": const Timeout(const Duration(seconds: 0))
 })
 
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
-  test("fail", () => throw 'oh no');
+  test("fail", () async {
+    await new Future.delayed(Duration.ZERO);
+    throw 'oh no';
+  });
 }
 ''').create();
 
       var test = runTest(["test.dart"]);
       test.stdout.expect(containsInOrder([
         "Test timed out after 0 seconds.",
         "-1: Some tests failed."
       ]));
       test.shouldExit(1);
     });
@@ skipping 125 matching lines @@
         d.file("test.dart", _success).create();
 
         var test = runTest(["--plain-name", "no match", "test.dart"]);
         test.stderr.expect(
             consumeThrough(contains('No tests match "no match".')));
         test.shouldExit(exit_codes.data);
       });
     });
   });
 }