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// Copyright 2015 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 "net/base/network_quality_estimator.h"
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/run_loop.h"
#include "base/test/histogram_tester.h"
#include "base/threading/platform_thread.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "net/base/network_change_notifier.h"
#include "net/base/network_quality.h"
#include "net/test/spawned_test_server/spawned_test_server.h"
#include "net/url_request/url_request_test_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"
namespace net {
// SpawnedTestServer not supported on iOS (see http://crbug.com/148666).
#if !defined(OS_IOS)
TEST(NetworkQualityEstimatorTest, TestPeakKbpsFastestRTTUpdates) {
SpawnedTestServer test_server_(
SpawnedTestServer::TYPE_HTTP, SpawnedTestServer::kLocalhost,
base::FilePath(FILE_PATH_LITERAL("net/data/url_request_unittest")));
ASSERT_TRUE(test_server_.Start());
// Enable requests to local host to be used for network quality estimation.
NetworkQualityEstimator estimator(true);
{
NetworkQuality network_quality = estimator.GetEstimate();
EXPECT_EQ(network_quality.fastest_rtt_confidence, 0);
EXPECT_EQ(network_quality.peak_throughput_kbps_confidence, 0);
}
TestDelegate d;
TestURLRequestContext context(false);
uint64_t min_transfer_size_in_bytes =
NetworkQualityEstimator::kMinTransferSizeInBytes;
base::TimeDelta request_duration = base::TimeDelta::FromMicroseconds(
NetworkQualityEstimator::kMinRequestDurationMicroseconds);
scoped_ptr<URLRequest> request(context.CreateRequest(
test_server_.GetURL("echo.html"), DEFAULT_PRIORITY, &d));
request->Start();
base::RunLoop().Run();
base::PlatformThread::Sleep(request_duration);
// With smaller transfer, |fastest_rtt| will be updated but not
// |peak_throughput_kbps|.
estimator.NotifyDataReceived(*(request.get()),
min_transfer_size_in_bytes - 1);
{
NetworkQuality network_quality = estimator.GetEstimate();
EXPECT_GT(network_quality.fastest_rtt_confidence, 0);
EXPECT_EQ(network_quality.peak_throughput_kbps_confidence, 0);
}
// With large transfer, both |fastest_rtt| and |peak_throughput_kbps| will be
// updated.
estimator.NotifyDataReceived(*(request.get()), min_transfer_size_in_bytes);
{
NetworkQuality network_quality = estimator.GetEstimate();
EXPECT_GT(network_quality.fastest_rtt_confidence, 0);
EXPECT_GT(network_quality.peak_throughput_kbps_confidence, 0);
EXPECT_GE(network_quality.fastest_rtt, request_duration);
EXPECT_GT(network_quality.peak_throughput_kbps, uint32_t(0));
EXPECT_LE(
network_quality.peak_throughput_kbps,
min_transfer_size_in_bytes * 8.0 / request_duration.InMilliseconds());
}
EXPECT_EQ(estimator.bytes_read_since_last_connection_change_, true);
// Check UMA histograms.
base::HistogramTester histogram_tester;
histogram_tester.ExpectTotalCount("NQE.PeakKbps.Unknown", 0);
histogram_tester.ExpectTotalCount("NQE.FastestRTT.Unknown", 0);
estimator.OnConnectionTypeChanged(
NetworkChangeNotifier::ConnectionType::CONNECTION_WIFI);
histogram_tester.ExpectTotalCount("NQE.PeakKbps.Unknown", 1);
histogram_tester.ExpectTotalCount("NQE.FastestRTT.Unknown", 1);
{
NetworkQuality network_quality = estimator.GetEstimate();
EXPECT_EQ(estimator.current_connection_type_,
NetworkChangeNotifier::ConnectionType::CONNECTION_WIFI);
EXPECT_EQ(network_quality.fastest_rtt_confidence, 0);
EXPECT_EQ(network_quality.peak_throughput_kbps_confidence, 0);
}
}
#endif // !defined(OS_IOS)
} // namespace net
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