143 lines
4.5 KiB
C++
143 lines
4.5 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/threading/watchdog.h"
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#include "base/logging.h"
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#include "base/synchronization/spin_wait.h"
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#include "base/threading/platform_thread.h"
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#include "base/time/time.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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namespace {
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//------------------------------------------------------------------------------
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// Provide a derived class to facilitate testing.
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class WatchdogCounter : public Watchdog {
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public:
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WatchdogCounter(const TimeDelta& duration,
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const std::string& thread_watched_name,
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bool enabled)
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: Watchdog(duration, thread_watched_name, enabled),
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alarm_counter_(0) {
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}
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virtual ~WatchdogCounter() {}
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virtual void Alarm() OVERRIDE {
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alarm_counter_++;
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Watchdog::Alarm();
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}
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int alarm_counter() { return alarm_counter_; }
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private:
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int alarm_counter_;
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DISALLOW_COPY_AND_ASSIGN(WatchdogCounter);
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};
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class WatchdogTest : public testing::Test {
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public:
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virtual void SetUp() OVERRIDE {
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Watchdog::ResetStaticData();
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}
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};
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} // namespace
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//------------------------------------------------------------------------------
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// Actual tests
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// Minimal constructor/destructor test.
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TEST_F(WatchdogTest, StartupShutdownTest) {
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Watchdog watchdog1(TimeDelta::FromMilliseconds(300), "Disabled", false);
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Watchdog watchdog2(TimeDelta::FromMilliseconds(300), "Enabled", true);
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}
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// Test ability to call Arm and Disarm repeatedly.
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TEST_F(WatchdogTest, ArmDisarmTest) {
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Watchdog watchdog1(TimeDelta::FromMilliseconds(300), "Disabled", false);
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watchdog1.Arm();
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watchdog1.Disarm();
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watchdog1.Arm();
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watchdog1.Disarm();
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Watchdog watchdog2(TimeDelta::FromMilliseconds(300), "Enabled", true);
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watchdog2.Arm();
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watchdog2.Disarm();
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watchdog2.Arm();
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watchdog2.Disarm();
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}
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// Make sure a basic alarm fires when the time has expired.
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TEST_F(WatchdogTest, AlarmTest) {
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WatchdogCounter watchdog(TimeDelta::FromMilliseconds(10), "Enabled", true);
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watchdog.Arm();
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SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(TimeDelta::FromMinutes(5),
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watchdog.alarm_counter() > 0);
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EXPECT_EQ(1, watchdog.alarm_counter());
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}
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// Make sure a basic alarm fires when the time has expired.
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TEST_F(WatchdogTest, AlarmPriorTimeTest) {
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WatchdogCounter watchdog(TimeDelta(), "Enabled2", true);
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// Set a time in the past.
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watchdog.ArmSomeTimeDeltaAgo(TimeDelta::FromSeconds(2));
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// It should instantly go off, but certainly in less than 5 minutes.
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SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(TimeDelta::FromMinutes(5),
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watchdog.alarm_counter() > 0);
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EXPECT_EQ(1, watchdog.alarm_counter());
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}
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// Make sure a disable alarm does nothing, even if we arm it.
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TEST_F(WatchdogTest, ConstructorDisabledTest) {
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WatchdogCounter watchdog(TimeDelta::FromMilliseconds(10), "Disabled", false);
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watchdog.Arm();
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// Alarm should not fire, as it was disabled.
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PlatformThread::Sleep(TimeDelta::FromMilliseconds(500));
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EXPECT_EQ(0, watchdog.alarm_counter());
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}
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// Make sure Disarming will prevent firing, even after Arming.
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TEST_F(WatchdogTest, DisarmTest) {
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WatchdogCounter watchdog(TimeDelta::FromSeconds(1), "Enabled3", true);
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TimeTicks start = TimeTicks::Now();
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watchdog.Arm();
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// Sleep a bit, but not past the alarm point.
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PlatformThread::Sleep(TimeDelta::FromMilliseconds(100));
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watchdog.Disarm();
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TimeTicks end = TimeTicks::Now();
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if (end - start > TimeDelta::FromMilliseconds(500)) {
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LOG(WARNING) << "100ms sleep took over 500ms, making the results of this "
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<< "timing-sensitive test suspicious. Aborting now.";
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return;
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}
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// Alarm should not have fired before it was disarmed.
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EXPECT_EQ(0, watchdog.alarm_counter());
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// Sleep past the point where it would have fired if it wasn't disarmed,
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// and verify that it didn't fire.
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PlatformThread::Sleep(TimeDelta::FromSeconds(1));
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EXPECT_EQ(0, watchdog.alarm_counter());
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// ...but even after disarming, we can still use the alarm...
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// Set a time greater than the timeout into the past.
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watchdog.ArmSomeTimeDeltaAgo(TimeDelta::FromSeconds(10));
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// It should almost instantly go off, but certainly in less than 5 minutes.
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SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(TimeDelta::FromMinutes(5),
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watchdog.alarm_counter() > 0);
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EXPECT_EQ(1, watchdog.alarm_counter());
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}
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} // namespace base
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