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-rw-r--r--absl/synchronization/notification_test.cc10
1 files changed, 7 insertions, 3 deletions
diff --git a/absl/synchronization/notification_test.cc b/absl/synchronization/notification_test.cc
index d8708d55..95bde0bd 100644
--- a/absl/synchronization/notification_test.cc
+++ b/absl/synchronization/notification_test.cc
@@ -72,12 +72,16 @@ static void BasicTests(bool notify_before_waiting, Notification* notification) {
EXPECT_FALSE(notification->WaitForNotificationWithDeadline(absl::Now()));
const absl::Duration delay = absl::Milliseconds(50);
+ const absl::Time start = absl::Now();
+ EXPECT_FALSE(notification->WaitForNotificationWithTimeout(delay));
+ const absl::Duration elapsed = absl::Now() - start;
+
// Allow for a slight early return, to account for quality of implementation
// issues on various platforms.
const absl::Duration slop = absl::Microseconds(200);
- absl::Time start = absl::Now();
- EXPECT_FALSE(notification->WaitForNotificationWithTimeout(delay));
- EXPECT_LE(start + delay, absl::Now() + slop);
+ EXPECT_LE(delay - slop, elapsed)
+ << "WaitForNotificationWithTimeout returned " << delay - elapsed
+ << " early (with " << slop << " slop), start time was " << start;
ThreadSafeCounter ready_counter;
ThreadSafeCounter done_counter;