| // Copyright 2013 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/download/rate_estimator.h" |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| using base::TimeDelta; |
| |
| namespace content { |
| |
| TEST(RateEstimatorTest, RateEstimator) { |
| base::TimeTicks now; |
| RateEstimator estimator(TimeDelta::FromSeconds(1), 10u, now); |
| EXPECT_EQ(0u, estimator.GetCountPerSecond(now)); |
| |
| estimator.Increment(50u, now); |
| EXPECT_EQ(50u, estimator.GetCountPerSecond(now)); |
| |
| now += TimeDelta::FromMilliseconds(800); |
| estimator.Increment(50, now); |
| EXPECT_EQ(100u, estimator.GetCountPerSecond(now)); |
| |
| // Advance time. |
| now += TimeDelta::FromSeconds(3); |
| EXPECT_EQ(25u, estimator.GetCountPerSecond(now)); |
| estimator.Increment(60, now); |
| EXPECT_EQ(40u, estimator.GetCountPerSecond(now)); |
| |
| // Advance time again. |
| now += TimeDelta::FromSeconds(4); |
| EXPECT_EQ(20u, estimator.GetCountPerSecond(now)); |
| |
| // Advance time to the end. |
| now += TimeDelta::FromSeconds(2); |
| EXPECT_EQ(16u, estimator.GetCountPerSecond(now)); |
| estimator.Increment(100, now); |
| EXPECT_EQ(26u, estimator.GetCountPerSecond(now)); |
| |
| // Now wrap around to the start. |
| now += TimeDelta::FromSeconds(1); |
| EXPECT_EQ(16u, estimator.GetCountPerSecond(now)); |
| estimator.Increment(100, now); |
| EXPECT_EQ(26u, estimator.GetCountPerSecond(now)); |
| |
| // Advance far into the future. |
| now += TimeDelta::FromSeconds(40); |
| EXPECT_EQ(0u, estimator.GetCountPerSecond(now)); |
| estimator.Increment(100, now); |
| EXPECT_EQ(100u, estimator.GetCountPerSecond(now)); |
| |
| // Pretend that there is timeticks wrap around. |
| now = base::TimeTicks(); |
| EXPECT_EQ(0u, estimator.GetCountPerSecond(now)); |
| } |
| |
| } // namespace content |