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Side by Side Diff: remoting/base/running_average_unittest.cc

Issue 1811833002: Show max latency on client's status bar (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 9 months ago
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1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include <stddef.h>
6 #include <stdint.h>
7
8 #include "base/macros.h"
9 #include "remoting/base/running_average.h"
10 #include "testing/gtest/include/gtest/gtest.h"
11
12 namespace remoting {
13
14 static const int64_t kTestValues[] = { 10, 20, 30, 10, 25, 16, 15 };
15
16 // Average across a single element, i.e. just return the most recent.
17 TEST(RunningAverageTest, OneElementWindow) {
18 RunningAverage running_average(1);
19 EXPECT_EQ(0, running_average.Average());
20
21 for (size_t i = 0; i < arraysize(kTestValues); ++i) {
22 running_average.Record(kTestValues[i]);
23 EXPECT_EQ(static_cast<double>(kTestValues[i]), running_average.Average());
24 }
25 }
26
27 // Average the two most recent elements.
28 TEST(RunningAverageTest, TwoElementWindow) {
29 RunningAverage running_average(2);
30 EXPECT_EQ(0, running_average.Average());
31
32 for (size_t i = 0; i < arraysize(kTestValues); ++i) {
33 running_average.Record(kTestValues[i]);
34
35 double expected = kTestValues[i];
36 if (i > 0)
37 expected = (expected + kTestValues[i-1]) / 2;
38
39 EXPECT_EQ(expected, running_average.Average());
40 }
41 }
42
43 // Average across all the elements if the window size exceeds the element count.
44 TEST(RunningAverageTest, LongWindow) {
45 RunningAverage running_average(arraysize(kTestValues) + 1);
46 EXPECT_EQ(0, running_average.Average());
47
48 for (size_t i = 0; i < arraysize(kTestValues); ++i) {
49 running_average.Record(kTestValues[i]);
50
51 double expected = 0.0;
52 for (size_t j = 0; j <= i; ++j)
53 expected += kTestValues[j];
54 expected /= i + 1;
55
56 EXPECT_EQ(expected, running_average.Average());
57 }
58 }
59
60 } // namespace remoting
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