Move webrtc/{base => rtc_base}

webrtc/base/ratetracker_unittest.cc

-/*
- *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/base/gunit.h"
-#include "webrtc/base/ratetracker.h"
-
-namespace rtc {
-namespace {
-  const uint32_t kBucketIntervalMs = 100;
-}  // namespace
-
-class RateTrackerForTest : public RateTracker {
- public:
-  RateTrackerForTest() : RateTracker(kBucketIntervalMs, 10u), time_(0) {}
-  int64_t Time() const override { return time_; }
-  void AdvanceTime(int delta) { time_ += delta; }
-
- private:
-  int64_t time_;
-};
-
-TEST(RateTrackerTest, Test30FPS) {
-  RateTrackerForTest tracker;
-
-  for (int i = 0; i < 300; ++i) {
-    tracker.AddSamples(1);
-    tracker.AdvanceTime(33);
-    if (i % 3 == 0) {
-      tracker.AdvanceTime(1);
-    }
-  }
-  EXPECT_DOUBLE_EQ(30.0, tracker.ComputeRateForInterval(50000));
-}
-
-TEST(RateTrackerTest, Test60FPS) {
-  RateTrackerForTest tracker;
-
-  for (int i = 0; i < 300; ++i) {
-    tracker.AddSamples(1);
-    tracker.AdvanceTime(16);
-    if (i % 3 != 0) {
-      tracker.AdvanceTime(1);
-    }
-  }
-  EXPECT_DOUBLE_EQ(60.0, tracker.ComputeRateForInterval(1000));
-}
-
-TEST(RateTrackerTest, TestRateTrackerBasics) {
-  RateTrackerForTest tracker;
-  EXPECT_DOUBLE_EQ(0.0, tracker.ComputeRateForInterval(1000));
-
-  // Add a sample.
-  tracker.AddSamples(1234);
-  // Advance the clock by less than one bucket interval (no rate returned).
-  tracker.AdvanceTime(kBucketIntervalMs - 1);
-  EXPECT_DOUBLE_EQ(0.0, tracker.ComputeRate());
-  // Advance the clock by 100 ms (one bucket interval).
-  tracker.AdvanceTime(1);
-  EXPECT_DOUBLE_EQ(12340.0, tracker.ComputeRateForInterval(1000));
-  EXPECT_DOUBLE_EQ(12340.0, tracker.ComputeRate());
-  EXPECT_EQ(1234U, tracker.TotalSampleCount());
-  EXPECT_DOUBLE_EQ(12340.0, tracker.ComputeTotalRate());
-
-  // Repeat.
-  tracker.AddSamples(1234);
-  tracker.AdvanceTime(100);
-  EXPECT_DOUBLE_EQ(12340.0, tracker.ComputeRateForInterval(1000));
-  EXPECT_DOUBLE_EQ(12340.0, tracker.ComputeRate());
-  EXPECT_EQ(1234U * 2, tracker.TotalSampleCount());
-  EXPECT_DOUBLE_EQ(12340.0, tracker.ComputeTotalRate());
-
-  // Advance the clock by 800 ms, so we've elapsed a full second.
-  // units_second should now be filled in properly.
-  tracker.AdvanceTime(800);
-  EXPECT_DOUBLE_EQ(1234.0 * 2.0, tracker.ComputeRateForInterval(1000));
-  EXPECT_DOUBLE_EQ(1234.0 * 2.0, tracker.ComputeRate());
-  EXPECT_EQ(1234U * 2, tracker.TotalSampleCount());
-  EXPECT_DOUBLE_EQ(1234.0 * 2.0, tracker.ComputeTotalRate());
-
-  // Poll the tracker again immediately. The reported rate should stay the same.
-  EXPECT_DOUBLE_EQ(1234.0 * 2.0, tracker.ComputeRateForInterval(1000));
-  EXPECT_DOUBLE_EQ(1234.0 * 2.0, tracker.ComputeRate());
-  EXPECT_EQ(1234U * 2, tracker.TotalSampleCount());
-  EXPECT_DOUBLE_EQ(1234.0 * 2.0, tracker.ComputeTotalRate());
-
-  // Do nothing and advance by a second. We should drop down to zero.
-  tracker.AdvanceTime(1000);
-  EXPECT_DOUBLE_EQ(0.0, tracker.ComputeRateForInterval(1000));
-  EXPECT_DOUBLE_EQ(0.0, tracker.ComputeRate());
-  EXPECT_EQ(1234U * 2, tracker.TotalSampleCount());
-  EXPECT_DOUBLE_EQ(1234.0, tracker.ComputeTotalRate());
-
-  // Send a bunch of data at a constant rate for 5.5 "seconds".
-  // We should report the rate properly.
-  for (int i = 0; i < 5500; i += 100) {
-    tracker.AddSamples(9876U);
-    tracker.AdvanceTime(100);
-  }
-  EXPECT_DOUBLE_EQ(9876.0 * 10.0, tracker.ComputeRateForInterval(1000));
-  EXPECT_DOUBLE_EQ(9876.0 * 10.0, tracker.ComputeRate());
-  EXPECT_EQ(1234U * 2 + 9876U * 55, tracker.TotalSampleCount());
-  EXPECT_DOUBLE_EQ((1234.0 * 2.0 + 9876.0 * 55.0) / 7.5,
-      tracker.ComputeTotalRate());
-
-  // Advance the clock by 500 ms. Since we sent nothing over this half-second,
-  // the reported rate should be reduced by half.
-  tracker.AdvanceTime(500);
-  EXPECT_DOUBLE_EQ(9876.0 * 5.0, tracker.ComputeRateForInterval(1000));
-  EXPECT_DOUBLE_EQ(9876.0 * 5.0, tracker.ComputeRate());
-  EXPECT_EQ(1234U * 2 + 9876U * 55, tracker.TotalSampleCount());
-  EXPECT_DOUBLE_EQ((1234.0 * 2.0 + 9876.0 * 55.0) / 8.0,
-      tracker.ComputeTotalRate());
-
-  // Rate over the last half second should be zero.
-  EXPECT_DOUBLE_EQ(0.0, tracker.ComputeRateForInterval(500));
-}
-
-TEST(RateTrackerTest, TestLongPeriodBetweenSamples) {
-  RateTrackerForTest tracker;
-  tracker.AddSamples(1);
-  tracker.AdvanceTime(1000);
-  EXPECT_DOUBLE_EQ(1.0, tracker.ComputeRate());
-
-  tracker.AdvanceTime(2000);
-  EXPECT_DOUBLE_EQ(0.0, tracker.ComputeRate());
-
-  tracker.AdvanceTime(2000);
-  tracker.AddSamples(1);
-  EXPECT_DOUBLE_EQ(1.0, tracker.ComputeRate());
-}
-
-TEST(RateTrackerTest, TestRolloff) {
-  RateTrackerForTest tracker;
-  for (int i = 0; i < 10; ++i) {
-    tracker.AddSamples(1U);
-    tracker.AdvanceTime(100);
-  }
-  EXPECT_DOUBLE_EQ(10.0, tracker.ComputeRate());
-
-  for (int i = 0; i < 10; ++i) {
-    tracker.AddSamples(1U);
-    tracker.AdvanceTime(50);
-  }
-  EXPECT_DOUBLE_EQ(15.0, tracker.ComputeRate());
-  EXPECT_DOUBLE_EQ(20.0, tracker.ComputeRateForInterval(500));
-
-  for (int i = 0; i < 10; ++i) {
-    tracker.AddSamples(1U);
-    tracker.AdvanceTime(50);
-  }
-  EXPECT_DOUBLE_EQ(20.0, tracker.ComputeRate());
-}
-
-TEST(RateTrackerTest, TestGetUnitSecondsAfterInitialValue) {
-  RateTrackerForTest tracker;
-  tracker.AddSamples(1234);
-  tracker.AdvanceTime(1000);
-  EXPECT_DOUBLE_EQ(1234.0, tracker.ComputeRateForInterval(1000));
-}
-
-}  // namespace rtc