mojo/edk/system/test_utils.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "mojo/edk/system/test_utils.h"
   6
   7 #include "base/bind.h"
   8 #include "base/callback.h"
   9 #include "base/synchronization/waitable_event.h"
  10 #include "base/test/test_timeouts.h"
  11 #include "build/build_config.h"
  12
  13 namespace mojo {
  14 namespace system {
  15 namespace test {
  16
  17 namespace {
  18
  19 void PostTaskAndWaitHelper(base::WaitableEvent* event,
  20                            const base::Closure& task) {
  21   task.Run();
  22   event->Signal();
  23 }
  24
  25 }  // namespace
  26
  27 void PostTaskAndWait(scoped_refptr<base::TaskRunner> task_runner,
  28                      const tracked_objects::Location& from_here,
  29                      const base::Closure& task) {
  30   base::WaitableEvent event(false, false);
  31   task_runner->PostTask(from_here,
  32                         base::Bind(&PostTaskAndWaitHelper, &event, task));
  33   event.Wait();
  34 }
  35
  36 base::TimeDelta EpsilonTimeout() {
  37 // Originally, our epsilon timeout was 10 ms, which was mostly fine but flaky on
  38 // some Windows bots. I don't recall ever seeing flakes on other bots. At 30 ms
  39 // tests seem reliable on Windows bots, but not at 25 ms. We'd like this timeout
  40 // to be as small as possible (see the description in the .h file).
  41 //
  42 // Currently, |tiny_timeout()| is usually 100 ms (possibly scaled under ASAN,
  43 // etc.). Based on this, set it to (usually be) 30 ms on Windows and 20 ms
  44 // elsewhere.
  45 #if defined(OS_WIN) || defined(OS_ANDROID)
  46   return (TestTimeouts::tiny_timeout() * 3) / 10;
  47 #else
  48   return (TestTimeouts::tiny_timeout() * 2) / 10;
  49 #endif
  50 }
  51
  52 }  // namespace test
  53 }  // namespace system
  54 }  // namespace mojo