| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "content/browser/net/network_quality_observer_impl.h" |
| |
| #include "base/run_loop.h" |
| #include "base/test/metrics/histogram_tester.h" |
| #include "base/time/time.h" |
| #include "content/public/test/browser_task_environment.h" |
| #include "net/nqe/effective_connection_type.h" |
| #include "services/network/test/test_network_quality_tracker.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace content { |
| namespace { |
| |
| TEST(NetworkQualityObserverImplTest, TestObserverNotified) { |
| content::BrowserTaskEnvironment task_environment( |
| content::BrowserTaskEnvironment::IO_MAINLOOP); |
| |
| network::TestNetworkQualityTracker test_network_quality_tracker; |
| |
| NetworkQualityObserverImpl impl(&test_network_quality_tracker); |
| |
| test_network_quality_tracker.ReportRTTsAndThroughputForTesting( |
| base::TimeDelta::FromMilliseconds(1), 100); |
| |
| base::RunLoop().RunUntilIdle(); |
| |
| base::HistogramTester histogram_tester; |
| |
| test_network_quality_tracker.ReportRTTsAndThroughputForTesting( |
| base::TimeDelta::FromMilliseconds(500), 100); |
| |
| // RTT changed from 1 msec to 500 msec. |
| histogram_tester.ExpectBucketCount( |
| "NQE.ContentObserver.NetworkQualityMeaningfullyChanged", 1, 1); |
| |
| test_network_quality_tracker.ReportRTTsAndThroughputForTesting( |
| base::TimeDelta::FromMilliseconds(625), 100); |
| // RTT changed from 500 msec to 625 msec. |
| histogram_tester.ExpectBucketCount( |
| "NQE.ContentObserver.NetworkQualityMeaningfullyChanged", 1, 2); |
| |
| test_network_quality_tracker.ReportRTTsAndThroughputForTesting( |
| base::TimeDelta::FromMilliseconds(626), 100); |
| // RTT changed from 625 msec to 626 msec which is not a meaningful change. |
| histogram_tester.ExpectBucketCount( |
| "NQE.ContentObserver.NetworkQualityMeaningfullyChanged", 1, 2); |
| EXPECT_LE(1, histogram_tester.GetBucketCount( |
| "NQE.ContentObserver.NetworkQualityMeaningfullyChanged", 0)); |
| } |
| |
| } // namespace |
| } // namespace content |