1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
// 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
|
