diff options
Diffstat (limited to 'chromium/base/trace_event/trace_event_system_stats_monitor_unittest.cc')
-rw-r--r-- | chromium/base/trace_event/trace_event_system_stats_monitor_unittest.cc | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/chromium/base/trace_event/trace_event_system_stats_monitor_unittest.cc b/chromium/base/trace_event/trace_event_system_stats_monitor_unittest.cc new file mode 100644 index 00000000000..03dff591cfa --- /dev/null +++ b/chromium/base/trace_event/trace_event_system_stats_monitor_unittest.cc @@ -0,0 +1,64 @@ +// Copyright 2013 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/trace_event/trace_event_system_stats_monitor.h" + +#include <sstream> +#include <string> + +#include "base/trace_event/trace_event_impl.h" +#include "testing/gtest/include/gtest/gtest.h" + +namespace base { +namespace trace_event { + +#if !defined(OS_IOS) +// Tests for the system stats monitor. +// Exists as a class so it can be a friend of TraceEventSystemStatsMonitor. +class TraceSystemStatsMonitorTest : public testing::Test { + public: + TraceSystemStatsMonitorTest() {} + ~TraceSystemStatsMonitorTest() override {} + + private: + DISALLOW_COPY_AND_ASSIGN(TraceSystemStatsMonitorTest); +}; + +////////////////////////////////////////////////////////////////////////////// + +TEST_F(TraceSystemStatsMonitorTest, TraceEventSystemStatsMonitor) { + MessageLoop message_loop; + + // Start with no observers of the TraceLog. + EXPECT_EQ(0u, TraceLog::GetInstance()->GetObserverCountForTest()); + + // Creating a system stats monitor adds it to the TraceLog observer list. + scoped_ptr<TraceEventSystemStatsMonitor> system_stats_monitor( + new TraceEventSystemStatsMonitor(message_loop.task_runner())); + EXPECT_EQ(1u, TraceLog::GetInstance()->GetObserverCountForTest()); + EXPECT_TRUE( + TraceLog::GetInstance()->HasEnabledStateObserver( + system_stats_monitor.get())); + + // By default the observer isn't dumping memory profiles. + EXPECT_FALSE(system_stats_monitor->IsTimerRunningForTest()); + + // Simulate enabling tracing. + system_stats_monitor->StartProfiling(); + message_loop.RunUntilIdle(); + EXPECT_TRUE(system_stats_monitor->IsTimerRunningForTest()); + + // Simulate disabling tracing. + system_stats_monitor->StopProfiling(); + message_loop.RunUntilIdle(); + EXPECT_FALSE(system_stats_monitor->IsTimerRunningForTest()); + + // Deleting the observer removes it from the TraceLog observer list. + system_stats_monitor.reset(); + EXPECT_EQ(0u, TraceLog::GetInstance()->GetObserverCountForTest()); +} +#endif // !defined(OS_IOS) + +} // namespace trace_event +} // namespace base |