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// Copyright (c) 2011 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/win/object_watcher.h"
#include <process.h>
#include "base/message_loop/message_loop.h"
#include "base/run_loop.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace win {
namespace {
class QuitDelegate : public ObjectWatcher::Delegate {
public:
void OnObjectSignaled(HANDLE object) override {
MessageLoop::current()->QuitWhenIdle();
}
};
class DecrementCountDelegate : public ObjectWatcher::Delegate {
public:
explicit DecrementCountDelegate(int* counter) : counter_(counter) {
}
void OnObjectSignaled(HANDLE object) override { --(*counter_); }
private:
int* counter_;
};
void RunTest_BasicSignal(MessageLoop::Type message_loop_type) {
MessageLoop message_loop(message_loop_type);
ObjectWatcher watcher;
EXPECT_FALSE(watcher.IsWatching());
// A manual-reset event that is not yet signaled.
HANDLE event = CreateEvent(NULL, TRUE, FALSE, NULL);
QuitDelegate delegate;
bool ok = watcher.StartWatchingOnce(event, &delegate);
EXPECT_TRUE(ok);
EXPECT_TRUE(watcher.IsWatching());
EXPECT_EQ(event, watcher.GetWatchedObject());
SetEvent(event);
MessageLoop::current()->Run();
EXPECT_FALSE(watcher.IsWatching());
CloseHandle(event);
}
void RunTest_BasicCancel(MessageLoop::Type message_loop_type) {
MessageLoop message_loop(message_loop_type);
ObjectWatcher watcher;
// A manual-reset event that is not yet signaled.
HANDLE event = CreateEvent(NULL, TRUE, FALSE, NULL);
QuitDelegate delegate;
bool ok = watcher.StartWatchingOnce(event, &delegate);
EXPECT_TRUE(ok);
watcher.StopWatching();
CloseHandle(event);
}
void RunTest_CancelAfterSet(MessageLoop::Type message_loop_type) {
MessageLoop message_loop(message_loop_type);
ObjectWatcher watcher;
int counter = 1;
DecrementCountDelegate delegate(&counter);
// A manual-reset event that is not yet signaled.
HANDLE event = CreateEvent(NULL, TRUE, FALSE, NULL);
bool ok = watcher.StartWatchingOnce(event, &delegate);
EXPECT_TRUE(ok);
SetEvent(event);
// Let the background thread do its business
Sleep(30);
watcher.StopWatching();
RunLoop().RunUntilIdle();
// Our delegate should not have fired.
EXPECT_EQ(1, counter);
CloseHandle(event);
}
void RunTest_SignalBeforeWatch(MessageLoop::Type message_loop_type) {
MessageLoop message_loop(message_loop_type);
ObjectWatcher watcher;
// A manual-reset event that is signaled before we begin watching.
HANDLE event = CreateEvent(NULL, TRUE, TRUE, NULL);
QuitDelegate delegate;
bool ok = watcher.StartWatchingOnce(event, &delegate);
EXPECT_TRUE(ok);
MessageLoop::current()->Run();
EXPECT_FALSE(watcher.IsWatching());
CloseHandle(event);
}
void RunTest_OutlivesMessageLoop(MessageLoop::Type message_loop_type) {
// Simulate a MessageLoop that dies before an ObjectWatcher. This ordinarily
// doesn't happen when people use the Thread class, but it can happen when
// people use the Singleton pattern or atexit.
HANDLE event = CreateEvent(NULL, TRUE, FALSE, NULL); // not signaled
{
ObjectWatcher watcher;
{
MessageLoop message_loop(message_loop_type);
QuitDelegate delegate;
watcher.StartWatchingOnce(event, &delegate);
}
}
CloseHandle(event);
}
class QuitAfterMultipleDelegate : public ObjectWatcher::Delegate {
public:
QuitAfterMultipleDelegate(HANDLE event, int iterations)
: event_(event), iterations_(iterations) {}
void OnObjectSignaled(HANDLE object) override {
if (--iterations_) {
SetEvent(event_);
} else {
MessageLoop::current()->QuitWhenIdle();
}
}
private:
HANDLE event_;
int iterations_;
};
void RunTest_ExecuteMultipleTimes(MessageLoop::Type message_loop_type) {
MessageLoop message_loop(message_loop_type);
ObjectWatcher watcher;
EXPECT_FALSE(watcher.IsWatching());
// An auto-reset event that is not yet signaled.
HANDLE event = CreateEvent(NULL, FALSE, FALSE, NULL);
QuitAfterMultipleDelegate delegate(event, 2);
bool ok = watcher.StartWatchingMultipleTimes(event, &delegate);
EXPECT_TRUE(ok);
EXPECT_TRUE(watcher.IsWatching());
EXPECT_EQ(event, watcher.GetWatchedObject());
SetEvent(event);
MessageLoop::current()->Run();
EXPECT_TRUE(watcher.IsWatching());
EXPECT_TRUE(watcher.StopWatching());
CloseHandle(event);
}
} // namespace
//-----------------------------------------------------------------------------
TEST(ObjectWatcherTest, BasicSignal) {
RunTest_BasicSignal(MessageLoop::TYPE_DEFAULT);
RunTest_BasicSignal(MessageLoop::TYPE_IO);
RunTest_BasicSignal(MessageLoop::TYPE_UI);
}
TEST(ObjectWatcherTest, BasicCancel) {
RunTest_BasicCancel(MessageLoop::TYPE_DEFAULT);
RunTest_BasicCancel(MessageLoop::TYPE_IO);
RunTest_BasicCancel(MessageLoop::TYPE_UI);
}
TEST(ObjectWatcherTest, CancelAfterSet) {
RunTest_CancelAfterSet(MessageLoop::TYPE_DEFAULT);
RunTest_CancelAfterSet(MessageLoop::TYPE_IO);
RunTest_CancelAfterSet(MessageLoop::TYPE_UI);
}
TEST(ObjectWatcherTest, SignalBeforeWatch) {
RunTest_SignalBeforeWatch(MessageLoop::TYPE_DEFAULT);
RunTest_SignalBeforeWatch(MessageLoop::TYPE_IO);
RunTest_SignalBeforeWatch(MessageLoop::TYPE_UI);
}
TEST(ObjectWatcherTest, OutlivesMessageLoop) {
RunTest_OutlivesMessageLoop(MessageLoop::TYPE_DEFAULT);
RunTest_OutlivesMessageLoop(MessageLoop::TYPE_IO);
RunTest_OutlivesMessageLoop(MessageLoop::TYPE_UI);
}
TEST(ObjectWatcherTest, ExecuteMultipleTimes) {
RunTest_ExecuteMultipleTimes(MessageLoop::TYPE_DEFAULT);
RunTest_ExecuteMultipleTimes(MessageLoop::TYPE_IO);
RunTest_ExecuteMultipleTimes(MessageLoop::TYPE_UI);
}
} // namespace win
} // namespace base
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