henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 1 | /* |
| 2 | * libjingle |
| 3 | * Copyright 2011, Google Inc. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions are met: |
| 7 | * |
| 8 | * 1. Redistributions of source code must retain the above copyright notice, |
| 9 | * this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * 3. The name of the author may not be used to endorse or promote products |
| 14 | * derived from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| 19 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 20 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 21 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 22 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 23 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 24 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 25 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | #include "talk/base/gunit.h" |
| 29 | #include "talk/base/rollingaccumulator.h" |
| 30 | |
| 31 | namespace talk_base { |
| 32 | |
| 33 | namespace { |
| 34 | |
| 35 | const double kLearningRate = 0.5; |
| 36 | |
| 37 | } // namespace |
| 38 | |
| 39 | TEST(RollingAccumulatorTest, ZeroSamples) { |
| 40 | RollingAccumulator<int> accum(10); |
| 41 | |
| 42 | EXPECT_EQ(0U, accum.count()); |
henrike@webrtc.org | 7587c5e | 2014-02-27 17:52:04 +0000 | [diff] [blame] | 43 | EXPECT_DOUBLE_EQ(0.0, accum.ComputeMean()); |
| 44 | EXPECT_DOUBLE_EQ(0.0, accum.ComputeVariance()); |
| 45 | EXPECT_EQ(0, accum.ComputeMin()); |
| 46 | EXPECT_EQ(0, accum.ComputeMax()); |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 47 | } |
| 48 | |
| 49 | TEST(RollingAccumulatorTest, SomeSamples) { |
| 50 | RollingAccumulator<int> accum(10); |
| 51 | for (int i = 0; i < 4; ++i) { |
| 52 | accum.AddSample(i); |
| 53 | } |
| 54 | |
| 55 | EXPECT_EQ(4U, accum.count()); |
| 56 | EXPECT_EQ(6, accum.ComputeSum()); |
henrike@webrtc.org | 7587c5e | 2014-02-27 17:52:04 +0000 | [diff] [blame] | 57 | EXPECT_DOUBLE_EQ(1.5, accum.ComputeMean()); |
| 58 | EXPECT_NEAR(2.26666, accum.ComputeWeightedMean(kLearningRate), 0.01); |
| 59 | EXPECT_DOUBLE_EQ(1.25, accum.ComputeVariance()); |
| 60 | EXPECT_EQ(0, accum.ComputeMin()); |
| 61 | EXPECT_EQ(3, accum.ComputeMax()); |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | TEST(RollingAccumulatorTest, RollingSamples) { |
| 65 | RollingAccumulator<int> accum(10); |
| 66 | for (int i = 0; i < 12; ++i) { |
| 67 | accum.AddSample(i); |
| 68 | } |
| 69 | |
| 70 | EXPECT_EQ(10U, accum.count()); |
| 71 | EXPECT_EQ(65, accum.ComputeSum()); |
henrike@webrtc.org | 7587c5e | 2014-02-27 17:52:04 +0000 | [diff] [blame] | 72 | EXPECT_DOUBLE_EQ(6.5, accum.ComputeMean()); |
| 73 | EXPECT_NEAR(10.0, accum.ComputeWeightedMean(kLearningRate), 0.01); |
| 74 | EXPECT_NEAR(9.0, accum.ComputeVariance(), 1.0); |
| 75 | EXPECT_EQ(2, accum.ComputeMin()); |
| 76 | EXPECT_EQ(11, accum.ComputeMax()); |
| 77 | } |
| 78 | |
| 79 | TEST(RollingAccumulatorTest, ResetSamples) { |
| 80 | RollingAccumulator<int> accum(10); |
| 81 | |
| 82 | for (int i = 0; i < 10; ++i) { |
| 83 | accum.AddSample(100); |
| 84 | } |
| 85 | EXPECT_EQ(10U, accum.count()); |
| 86 | EXPECT_DOUBLE_EQ(100.0, accum.ComputeMean()); |
| 87 | EXPECT_EQ(100, accum.ComputeMin()); |
| 88 | EXPECT_EQ(100, accum.ComputeMax()); |
| 89 | |
| 90 | accum.Reset(); |
| 91 | EXPECT_EQ(0U, accum.count()); |
| 92 | |
| 93 | for (int i = 0; i < 5; ++i) { |
| 94 | accum.AddSample(i); |
| 95 | } |
| 96 | |
| 97 | EXPECT_EQ(5U, accum.count()); |
| 98 | EXPECT_EQ(10, accum.ComputeSum()); |
| 99 | EXPECT_DOUBLE_EQ(2.0, accum.ComputeMean()); |
| 100 | EXPECT_EQ(0, accum.ComputeMin()); |
| 101 | EXPECT_EQ(4, accum.ComputeMax()); |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | TEST(RollingAccumulatorTest, RollingSamplesDouble) { |
| 105 | RollingAccumulator<double> accum(10); |
| 106 | for (int i = 0; i < 23; ++i) { |
| 107 | accum.AddSample(5 * i); |
| 108 | } |
| 109 | |
| 110 | EXPECT_EQ(10u, accum.count()); |
| 111 | EXPECT_DOUBLE_EQ(875.0, accum.ComputeSum()); |
| 112 | EXPECT_DOUBLE_EQ(87.5, accum.ComputeMean()); |
| 113 | EXPECT_NEAR(105.049, accum.ComputeWeightedMean(kLearningRate), 0.1); |
| 114 | EXPECT_NEAR(229.166667, accum.ComputeVariance(), 25); |
henrike@webrtc.org | 7587c5e | 2014-02-27 17:52:04 +0000 | [diff] [blame] | 115 | EXPECT_DOUBLE_EQ(65.0, accum.ComputeMin()); |
| 116 | EXPECT_DOUBLE_EQ(110.0, accum.ComputeMax()); |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | TEST(RollingAccumulatorTest, ComputeWeightedMeanCornerCases) { |
| 120 | RollingAccumulator<int> accum(10); |
henrike@webrtc.org | 7587c5e | 2014-02-27 17:52:04 +0000 | [diff] [blame] | 121 | EXPECT_DOUBLE_EQ(0.0, accum.ComputeWeightedMean(kLearningRate)); |
| 122 | EXPECT_DOUBLE_EQ(0.0, accum.ComputeWeightedMean(0.0)); |
| 123 | EXPECT_DOUBLE_EQ(0.0, accum.ComputeWeightedMean(1.1)); |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 124 | |
| 125 | for (int i = 0; i < 8; ++i) { |
| 126 | accum.AddSample(i); |
| 127 | } |
| 128 | |
henrike@webrtc.org | 7587c5e | 2014-02-27 17:52:04 +0000 | [diff] [blame] | 129 | EXPECT_DOUBLE_EQ(3.5, accum.ComputeMean()); |
| 130 | EXPECT_DOUBLE_EQ(3.5, accum.ComputeWeightedMean(0)); |
| 131 | EXPECT_DOUBLE_EQ(3.5, accum.ComputeWeightedMean(1.1)); |
| 132 | EXPECT_NEAR(6.0, accum.ComputeWeightedMean(kLearningRate), 0.1); |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | } // namespace talk_base |