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| 1 // Copyright 2014 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 "base/test/histogram_tester.h" | |
| 6 | |
| 7 #include "base/memory/scoped_ptr.h" | |
| 8 #include "base/metrics/histogram_macros.h" | |
| 9 #include "base/metrics/histogram_samples.h" | |
| 10 #include "testing/gmock/include/gmock/gmock.h" | |
| 11 #include "testing/gtest/include/gtest/gtest.h" | |
| 12 | |
| 13 namespace base { | |
| 14 | |
| 15 using ::testing::ElementsAre; | |
| 16 | |
| 17 const std::string kHistogram1 = "Test1"; | |
| 18 const std::string kHistogram2 = "Test2"; | |
| 19 const std::string kHistogram3 = "Test3"; | |
| 20 const std::string kHistogram4 = "Test4"; | |
| 21 const std::string kHistogram5 = "Test5"; | |
| 22 | |
| 23 typedef testing::Test HistogramTesterTest; | |
| 24 | |
| 25 TEST_F(HistogramTesterTest, Scope) { | |
| 26 // Record a histogram before the creation of the recorder. | |
| 27 UMA_HISTOGRAM_BOOLEAN(kHistogram1, true); | |
| 28 | |
| 29 HistogramTester tester; | |
| 30 | |
| 31 // Verify that no histogram is recorded. | |
| 32 scoped_ptr<HistogramSamples> samples( | |
| 33 tester.GetHistogramSamplesSinceCreation(kHistogram1)); | |
| 34 EXPECT_FALSE(samples); | |
| 35 | |
| 36 // Record a histogram after the creation of the recorder. | |
| 37 UMA_HISTOGRAM_BOOLEAN(kHistogram1, true); | |
| 38 | |
| 39 // Verify that one histogram is recorded. | |
| 40 samples = tester.GetHistogramSamplesSinceCreation(kHistogram1); | |
| 41 EXPECT_TRUE(samples); | |
| 42 EXPECT_EQ(1, samples->TotalCount()); | |
| 43 } | |
| 44 | |
| 45 TEST_F(HistogramTesterTest, TestUniqueSample) { | |
| 46 HistogramTester tester; | |
| 47 | |
| 48 // Record into a sample thrice | |
| 49 UMA_HISTOGRAM_COUNTS_100(kHistogram2, 2); | |
| 50 UMA_HISTOGRAM_COUNTS_100(kHistogram2, 2); | |
| 51 UMA_HISTOGRAM_COUNTS_100(kHistogram2, 2); | |
| 52 | |
| 53 tester.ExpectUniqueSample(kHistogram2, 2, 3); | |
| 54 } | |
| 55 | |
| 56 TEST_F(HistogramTesterTest, TestBucketsSample) { | |
| 57 HistogramTester tester; | |
| 58 | |
| 59 // Record into a sample twice | |
| 60 UMA_HISTOGRAM_COUNTS_100(kHistogram3, 2); | |
| 61 UMA_HISTOGRAM_COUNTS_100(kHistogram3, 2); | |
| 62 UMA_HISTOGRAM_COUNTS_100(kHistogram3, 2); | |
| 63 UMA_HISTOGRAM_COUNTS_100(kHistogram3, 2); | |
| 64 UMA_HISTOGRAM_COUNTS_100(kHistogram3, 3); | |
| 65 | |
| 66 tester.ExpectBucketCount(kHistogram3, 2, 4); | |
| 67 tester.ExpectBucketCount(kHistogram3, 3, 1); | |
| 68 | |
| 69 tester.ExpectTotalCount(kHistogram3, 5); | |
| 70 } | |
| 71 | |
| 72 TEST_F(HistogramTesterTest, TestBucketsSampleWithScope) { | |
| 73 // Record into a sample twice, once before the tester creation and once after. | |
| 74 UMA_HISTOGRAM_COUNTS_100(kHistogram4, 2); | |
| 75 | |
| 76 HistogramTester tester; | |
| 77 UMA_HISTOGRAM_COUNTS_100(kHistogram4, 3); | |
| 78 | |
| 79 tester.ExpectBucketCount(kHistogram4, 2, 0); | |
| 80 tester.ExpectBucketCount(kHistogram4, 3, 1); | |
| 81 | |
| 82 tester.ExpectTotalCount(kHistogram4, 1); | |
| 83 } | |
| 84 | |
| 85 TEST_F(HistogramTesterTest, TestGetAllSamples) { | |
| 86 HistogramTester tester; | |
| 87 UMA_HISTOGRAM_ENUMERATION(kHistogram5, 2, 5); | |
| 88 UMA_HISTOGRAM_ENUMERATION(kHistogram5, 3, 5); | |
| 89 UMA_HISTOGRAM_ENUMERATION(kHistogram5, 3, 5); | |
| 90 UMA_HISTOGRAM_ENUMERATION(kHistogram5, 5, 5); | |
| 91 | |
| 92 EXPECT_THAT(tester.GetAllSamples(kHistogram5), | |
| 93 ElementsAre(Bucket(2, 1), Bucket(3, 2), Bucket(5, 1))); | |
| 94 } | |
| 95 | |
| 96 } // namespace base | |
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