| // Copyright 2014 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 "base/test/histogram_tester.h" |
| |
| #include "base/memory/scoped_ptr.h" |
| #include "base/metrics/histogram_macros.h" |
| #include "base/metrics/histogram_samples.h" |
| #include "testing/gmock/include/gmock/gmock.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| using ::testing::ElementsAre; |
| using ::testing::IsEmpty; |
| |
| namespace { |
| |
| const char kHistogram1[] = "Test1"; |
| const char kHistogram2[] = "Test2"; |
| const char kHistogram3[] = "Test3"; |
| const char kHistogram4[] = "Test4"; |
| const char kHistogram5[] = "Test5"; |
| |
| } // namespace |
| |
| namespace base { |
| |
| typedef testing::Test HistogramTesterTest; |
| |
| TEST_F(HistogramTesterTest, Scope) { |
| // Record a histogram before the creation of the recorder. |
| UMA_HISTOGRAM_BOOLEAN(kHistogram1, true); |
| |
| HistogramTester tester; |
| |
| // Verify that no histogram is recorded. |
| tester.ExpectTotalCount(kHistogram1, 0); |
| |
| // Record a histogram after the creation of the recorder. |
| UMA_HISTOGRAM_BOOLEAN(kHistogram1, true); |
| |
| // Verify that one histogram is recorded. |
| scoped_ptr<HistogramSamples> samples( |
| tester.GetHistogramSamplesSinceCreation(kHistogram1)); |
| EXPECT_TRUE(samples); |
| EXPECT_EQ(1, samples->TotalCount()); |
| } |
| |
| TEST_F(HistogramTesterTest, GetHistogramSamplesSinceCreationNotNull) { |
| // Chose the histogram name uniquely, to ensure nothing was recorded for it so |
| // far. |
| static const char kHistogram[] = |
| "GetHistogramSamplesSinceCreationNotNullHistogram"; |
| HistogramTester tester; |
| |
| // Verify that the returned samples are empty but not null. |
| scoped_ptr<HistogramSamples> samples( |
| tester.GetHistogramSamplesSinceCreation(kHistogram1)); |
| EXPECT_TRUE(samples); |
| tester.ExpectTotalCount(kHistogram, 0); |
| } |
| |
| TEST_F(HistogramTesterTest, TestUniqueSample) { |
| HistogramTester tester; |
| |
| // Record into a sample thrice |
| UMA_HISTOGRAM_COUNTS_100(kHistogram2, 2); |
| UMA_HISTOGRAM_COUNTS_100(kHistogram2, 2); |
| UMA_HISTOGRAM_COUNTS_100(kHistogram2, 2); |
| |
| tester.ExpectUniqueSample(kHistogram2, 2, 3); |
| } |
| |
| TEST_F(HistogramTesterTest, TestBucketsSample) { |
| HistogramTester tester; |
| |
| // Record into a sample twice |
| UMA_HISTOGRAM_COUNTS_100(kHistogram3, 2); |
| UMA_HISTOGRAM_COUNTS_100(kHistogram3, 2); |
| UMA_HISTOGRAM_COUNTS_100(kHistogram3, 2); |
| UMA_HISTOGRAM_COUNTS_100(kHistogram3, 2); |
| UMA_HISTOGRAM_COUNTS_100(kHistogram3, 3); |
| |
| tester.ExpectBucketCount(kHistogram3, 2, 4); |
| tester.ExpectBucketCount(kHistogram3, 3, 1); |
| |
| tester.ExpectTotalCount(kHistogram3, 5); |
| } |
| |
| TEST_F(HistogramTesterTest, TestBucketsSampleWithScope) { |
| // Record into a sample twice, once before the tester creation and once after. |
| UMA_HISTOGRAM_COUNTS_100(kHistogram4, 2); |
| |
| HistogramTester tester; |
| UMA_HISTOGRAM_COUNTS_100(kHistogram4, 3); |
| |
| tester.ExpectBucketCount(kHistogram4, 2, 0); |
| tester.ExpectBucketCount(kHistogram4, 3, 1); |
| |
| tester.ExpectTotalCount(kHistogram4, 1); |
| } |
| |
| TEST_F(HistogramTesterTest, TestGetAllSamples) { |
| HistogramTester tester; |
| UMA_HISTOGRAM_ENUMERATION(kHistogram5, 2, 5); |
| UMA_HISTOGRAM_ENUMERATION(kHistogram5, 3, 5); |
| UMA_HISTOGRAM_ENUMERATION(kHistogram5, 3, 5); |
| UMA_HISTOGRAM_ENUMERATION(kHistogram5, 5, 5); |
| |
| EXPECT_THAT(tester.GetAllSamples(kHistogram5), |
| ElementsAre(Bucket(2, 1), Bucket(3, 2), Bucket(5, 1))); |
| } |
| |
| TEST_F(HistogramTesterTest, TestGetAllSamples_NoSamples) { |
| HistogramTester tester; |
| EXPECT_THAT(tester.GetAllSamples(kHistogram5), IsEmpty()); |
| } |
| |
| } // namespace base |