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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/debug/trace_event_system_stats_monitor.h" |
| 6 |
| 7 #include <sstream> |
| 8 #include <string> |
| 9 |
| 10 #include "base/debug/trace_event_impl.h" |
| 11 #include "base/message_loop/message_loop.h" |
| 12 #include "testing/gtest/include/gtest/gtest.h" |
| 13 |
| 14 namespace base { |
| 15 namespace debug { |
| 16 |
| 17 #if !defined(OS_IOS) |
| 18 // Tests for the system stats monitor. |
| 19 // Exists as a class so it can be a friend of TraceEventSystemStatsMonitor. |
| 20 class TraceSystemStatsMonitorTest : public testing::Test { |
| 21 public: |
| 22 TraceSystemStatsMonitorTest() {} |
| 23 virtual ~TraceSystemStatsMonitorTest() {} |
| 24 |
| 25 private: |
| 26 DISALLOW_COPY_AND_ASSIGN(TraceSystemStatsMonitorTest); |
| 27 }; |
| 28 |
| 29 ////////////////////////////////////////////////////////////////////////////// |
| 30 |
| 31 TEST_F(TraceSystemStatsMonitorTest, TraceEventSystemStatsMonitor) { |
| 32 MessageLoop message_loop; |
| 33 |
| 34 // Start with no observers of the TraceLog. |
| 35 EXPECT_EQ(0u, TraceLog::GetInstance()->GetObserverCountForTest()); |
| 36 |
| 37 // Creating a system stats monitor adds it to the TraceLog observer list. |
| 38 scoped_ptr<TraceEventSystemStatsMonitor> system_stats_monitor( |
| 39 new TraceEventSystemStatsMonitor( |
| 40 message_loop.message_loop_proxy())); |
| 41 EXPECT_EQ(1u, TraceLog::GetInstance()->GetObserverCountForTest()); |
| 42 EXPECT_TRUE( |
| 43 TraceLog::GetInstance()->HasEnabledStateObserver( |
| 44 system_stats_monitor.get())); |
| 45 |
| 46 // By default the observer isn't dumping memory profiles. |
| 47 EXPECT_FALSE(system_stats_monitor->IsTimerRunningForTest()); |
| 48 |
| 49 // Simulate enabling tracing. |
| 50 system_stats_monitor->StartProfiling(); |
| 51 message_loop.RunUntilIdle(); |
| 52 EXPECT_TRUE(system_stats_monitor->IsTimerRunningForTest()); |
| 53 |
| 54 // Simulate disabling tracing. |
| 55 system_stats_monitor->StopProfiling(); |
| 56 message_loop.RunUntilIdle(); |
| 57 EXPECT_FALSE(system_stats_monitor->IsTimerRunningForTest()); |
| 58 |
| 59 // Deleting the observer removes it from the TraceLog observer list. |
| 60 system_stats_monitor.reset(); |
| 61 EXPECT_EQ(0u, TraceLog::GetInstance()->GetObserverCountForTest()); |
| 62 } |
| 63 #endif // !defined(OS_IOS) |
| 64 |
| 65 } // namespace debug |
| 66 } // namespace base |
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