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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 "base/trace_event/trace_event_system_stats_monitor.h" | |
| 6 | |
| 7 #include <sstream> | |
| 8 #include <string> | |
| 9 | |
| 10 #include "base/trace_event/trace_event_impl.h" | |
| 11 #include "testing/gtest/include/gtest/gtest.h" | |
| 12 | |
| 13 namespace base { | |
| 14 namespace trace_event { | |
| 15 | |
| 16 #if !defined(OS_IOS) | |
| 17 // Tests for the system stats monitor. | |
| 18 // Exists as a class so it can be a friend of TraceEventSystemStatsMonitor. | |
| 19 class TraceSystemStatsMonitorTest : public testing::Test { | |
| 20 public: | |
| 21 TraceSystemStatsMonitorTest() {} | |
| 22 ~TraceSystemStatsMonitorTest() override {} | |
| 23 | |
| 24 private: | |
| 25 DISALLOW_COPY_AND_ASSIGN(TraceSystemStatsMonitorTest); | |
| 26 }; | |
| 27 | |
| 28 ////////////////////////////////////////////////////////////////////////////// | |
| 29 | |
| 30 TEST_F(TraceSystemStatsMonitorTest, TraceEventSystemStatsMonitor) { | |
| 31 MessageLoop message_loop; | |
| 32 | |
| 33 // Start with no observers of the TraceLog. | |
| 34 EXPECT_EQ(0u, TraceLog::GetInstance()->GetObserverCountForTest()); | |
| 35 | |
| 36 // Creating a system stats monitor adds it to the TraceLog observer list. | |
| 37 scoped_ptr<TraceEventSystemStatsMonitor> system_stats_monitor( | |
| 38 new TraceEventSystemStatsMonitor(message_loop.task_runner())); | |
| 39 EXPECT_EQ(1u, TraceLog::GetInstance()->GetObserverCountForTest()); | |
| 40 EXPECT_TRUE( | |
| 41 TraceLog::GetInstance()->HasEnabledStateObserver( | |
| 42 system_stats_monitor.get())); | |
| 43 | |
| 44 // By default the observer isn't dumping memory profiles. | |
| 45 EXPECT_FALSE(system_stats_monitor->IsTimerRunningForTest()); | |
| 46 | |
| 47 // Simulate enabling tracing. | |
| 48 system_stats_monitor->StartProfiling(); | |
| 49 message_loop.RunUntilIdle(); | |
| 50 EXPECT_TRUE(system_stats_monitor->IsTimerRunningForTest()); | |
| 51 | |
| 52 // Simulate disabling tracing. | |
| 53 system_stats_monitor->StopProfiling(); | |
| 54 message_loop.RunUntilIdle(); | |
| 55 EXPECT_FALSE(system_stats_monitor->IsTimerRunningForTest()); | |
| 56 | |
| 57 // Deleting the observer removes it from the TraceLog observer list. | |
| 58 system_stats_monitor.reset(); | |
| 59 EXPECT_EQ(0u, TraceLog::GetInstance()->GetObserverCountForTest()); | |
| 60 } | |
| 61 #endif // !defined(OS_IOS) | |
| 62 | |
| 63 } // namespace trace_event | |
| 64 } // namespace base | |
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