| // Copyright 2015 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 "ash/metrics/task_switch_time_tracker.h" |
| |
| #include <string> |
| |
| #include "ash/test/task_switch_time_tracker_test_api.h" |
| #include "base/test/histogram_tester.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace ash { |
| |
| namespace { |
| |
| // A dummy histogram name. |
| const std::string kHistogramName = "Dummy.Histogram"; |
| |
| } // namespace |
| |
| class TaskSwitchTimeTrackerTest : public testing::Test { |
| public: |
| TaskSwitchTimeTrackerTest(); |
| ~TaskSwitchTimeTrackerTest() override; |
| |
| // testing::Test: |
| void SetUp() override; |
| void TearDown() override; |
| |
| // Wrapper to the test targets OnTaskSwitch() method. |
| void OnTaskSwitch(); |
| |
| TaskSwitchTimeTracker* time_tracker() { |
| return time_tracker_test_api_->time_tracker(); |
| } |
| |
| protected: |
| // Used to verify recorded histogram data. |
| std::unique_ptr<base::HistogramTester> histogram_tester_; |
| |
| // A Test API that wraps the test target. |
| std::unique_ptr<test::TaskSwitchTimeTrackerTestAPI> time_tracker_test_api_; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(TaskSwitchTimeTrackerTest); |
| }; |
| |
| TaskSwitchTimeTrackerTest::TaskSwitchTimeTrackerTest() {} |
| |
| TaskSwitchTimeTrackerTest::~TaskSwitchTimeTrackerTest() {} |
| |
| void TaskSwitchTimeTrackerTest::SetUp() { |
| testing::Test::SetUp(); |
| |
| histogram_tester_.reset(new base::HistogramTester()); |
| time_tracker_test_api_.reset( |
| new test::TaskSwitchTimeTrackerTestAPI(kHistogramName)); |
| // The TaskSwitchTimeTracker interprets a value of base::TimeTicks() as if the |
| // |last_action_time_| has not been set. |
| time_tracker_test_api_->Advance(base::TimeDelta::FromMilliseconds(1)); |
| } |
| |
| void TaskSwitchTimeTrackerTest::TearDown() { |
| testing::Test::TearDown(); |
| time_tracker_test_api_.reset(); |
| histogram_tester_.reset(); |
| } |
| |
| void TaskSwitchTimeTrackerTest::OnTaskSwitch() { |
| time_tracker()->OnTaskSwitch(); |
| } |
| |
| // Verifies TaskSwitchTimeTracker::HasLastActionTime() returns false after |
| // construction. |
| TEST_F(TaskSwitchTimeTrackerTest, |
| HasLastActionTimeShouldBeFalseAfterConstruction) { |
| EXPECT_FALSE(time_tracker_test_api_->HasLastActionTime()); |
| } |
| |
| // Verifies TaskSwitchTimeTracker::HasLastActionTime() returns true after the |
| // first call to TaskSwitchTimeTracker::OnTaskSwitch() and no histogram data was |
| // recorded. |
| TEST_F(TaskSwitchTimeTrackerTest, |
| HasLastActionTimeShouldBeTrueAfterOnTaskSwitch) { |
| OnTaskSwitch(); |
| histogram_tester_->ExpectTotalCount(kHistogramName, 0); |
| } |
| |
| // Verfies that the histogram data is recorded in the correct buckets. |
| TEST_F(TaskSwitchTimeTrackerTest, RecordAfterTwoTaskSwitches) { |
| OnTaskSwitch(); |
| |
| time_tracker_test_api_->Advance(base::TimeDelta::FromMilliseconds(2)); |
| OnTaskSwitch(); |
| histogram_tester_->ExpectTotalCount(kHistogramName, 1); |
| histogram_tester_->ExpectBucketCount(kHistogramName, 0, 1); |
| |
| time_tracker_test_api_->Advance(base::TimeDelta::FromSeconds(1)); |
| OnTaskSwitch(); |
| histogram_tester_->ExpectTotalCount(kHistogramName, 2); |
| histogram_tester_->ExpectBucketCount(kHistogramName, 1, 1); |
| } |
| |
| } // namespace ash |