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Use a fake clock for rtc::Thread::PostDelayedTask test

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The test would flake using a real clock since time may pass between
calls to PostDelayedTask which would result in the tasks running
out of the expected order.

Bug: webrtc:11208, webrtc:11219
Change-Id: Ice5fe6ec4e9bf2ce89f00c6de7ed06b89dbe88cc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/162100
Reviewed-by: Yves Gerey <yvesg@google.com>
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30101}
This commit is contained in:
Steve Anton
2019-12-16 00:56:02 -08:00
committed by Commit Bot
parent f9d92ed2c8
commit 094396fb76
1 changed files with 4 additions and 2 deletions
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6
rtc_base/thread_unittest.cc
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@ -920,6 +920,7 @@ TEST(ThreadPostDelayedTaskTest, InvokesAsynchronously) {
}
TEST(ThreadPostDelayedTaskTest, InvokesInDelayOrder) {
ScopedFakeClock clock;
std::unique_ptr<rtc::Thread> background_thread(rtc::Thread::Create());
background_thread->Start();
@ -940,8 +941,9 @@ TEST(ThreadPostDelayedTaskTest, InvokesInDelayOrder) {
// All tasks have been posted before the first one is unblocked.
first.Set();
// Only if the chain is invoked in posted order will the last event be set.
fourth.Wait(Event::kForever);
// Only if the chain is invoked in delay order will the last event be set.
clock.AdvanceTime(webrtc::TimeDelta::ms(11));
EXPECT_TRUE(fourth.Wait(0));
}
class ThreadFactory : public webrtc::TaskQueueFactory {