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// Copyright (c) 2006-2008 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 <process.h>
#include "base/message_loop.h"
#include "base/object_watcher.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
typedef testing::Test ObjectWatcherTest;
class QuitDelegate : public base::ObjectWatcher::Delegate {
public:
virtual void OnObjectSignaled(HANDLE object) {
MessageLoop::current()->Quit();
}
};
class DecrementCountDelegate : public base::ObjectWatcher::Delegate {
public:
DecrementCountDelegate(int* counter) : counter_(counter) {
}
virtual void OnObjectSignaled(HANDLE object) {
--(*counter_);
}
private:
int* counter_;
};
} // namespace
TEST(ObjectWatcherTest, BasicSignal) {
MessageLoop message_loop;
base::ObjectWatcher watcher;
// A manual-reset event that is not yet signaled.
HANDLE event = CreateEvent(NULL, TRUE, FALSE, NULL);
QuitDelegate delegate;
bool ok = watcher.StartWatching(event, &delegate);
EXPECT_TRUE(ok);
SetEvent(event);
MessageLoop::current()->Run();
CloseHandle(event);
}
TEST(ObjectWatcherTest, BasicCancel) {
MessageLoop message_loop;
base::ObjectWatcher watcher;
// A manual-reset event that is not yet signaled.
HANDLE event = CreateEvent(NULL, TRUE, FALSE, NULL);
QuitDelegate delegate;
bool ok = watcher.StartWatching(event, &delegate);
EXPECT_TRUE(ok);
watcher.StopWatching();
CloseHandle(event);
}
TEST(ObjectWatcherTest, CancelAfterSet) {
MessageLoop message_loop;
base::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.StartWatching(event, &delegate);
EXPECT_TRUE(ok);
SetEvent(event);
// Let the background thread do its business
Sleep(30);
watcher.StopWatching();
MessageLoop::current()->RunAllPending();
// Our delegate should not have fired.
EXPECT_EQ(1, counter);
CloseHandle(event);
}
TEST(ObjectWatcherTest, OutlivesMessageLoop) {
// 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
{
base::ObjectWatcher watcher;
{
MessageLoop message_loop;
QuitDelegate delegate;
watcher.StartWatching(event, &delegate);
}
}
CloseHandle(event);
}
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