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// Copyright 2011 The Chromium Authors
// 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 <windows.h>
#include <utility>
#include "base/memory/raw_ptr.h"
#include "base/run_loop.h"
#include "base/test/task_environment.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace win {
namespace {
class QuitDelegate : public ObjectWatcher::Delegate {
public:
explicit QuitDelegate(base::OnceClosure quit_closure)
: quit_closure_(std::move(quit_closure)) {}
void OnObjectSignaled(HANDLE object) override {
std::move(quit_closure_).Run();
}
private:
base::OnceClosure quit_closure_;
};
class DecrementCountDelegate : public ObjectWatcher::Delegate {
public:
explicit DecrementCountDelegate(int* counter) : counter_(counter) {}
void OnObjectSignaled(HANDLE object) override { --(*counter_); }
private:
raw_ptr<int> counter_;
};
void RunTest_BasicSignal(
test::TaskEnvironment::MainThreadType main_thread_type) {
test::TaskEnvironment task_environment(main_thread_type);
ObjectWatcher watcher;
EXPECT_FALSE(watcher.IsWatching());
// A manual-reset event that is not yet signaled.
HANDLE event = CreateEvent(nullptr, TRUE, FALSE, nullptr);
base::RunLoop loop;
QuitDelegate delegate(loop.QuitWhenIdleClosure());
bool ok = watcher.StartWatchingOnce(event, &delegate);
EXPECT_TRUE(ok);
EXPECT_TRUE(watcher.IsWatching());
EXPECT_EQ(event, watcher.GetWatchedObject());
SetEvent(event);
loop.Run();
EXPECT_FALSE(watcher.IsWatching());
CloseHandle(event);
}
void RunTest_BasicCancel(
test::TaskEnvironment::MainThreadType main_thread_type) {
test::TaskEnvironment task_environment(main_thread_type);
ObjectWatcher watcher;
// A manual-reset event that is not yet signaled.
HANDLE event = CreateEvent(nullptr, TRUE, FALSE, nullptr);
base::RunLoop loop;
QuitDelegate delegate(loop.QuitWhenIdleClosure());
bool ok = watcher.StartWatchingOnce(event, &delegate);
EXPECT_TRUE(ok);
watcher.StopWatching();
CloseHandle(event);
}
void RunTest_CancelAfterSet(
test::TaskEnvironment::MainThreadType main_thread_type) {
test::TaskEnvironment task_environment(main_thread_type);
ObjectWatcher watcher;
int counter = 1;
DecrementCountDelegate delegate(&counter);
base::RunLoop loop;
// A manual-reset event that is not yet signaled.
HANDLE event = CreateEvent(nullptr, TRUE, FALSE, nullptr);
bool ok = watcher.StartWatchingOnce(event, &delegate);
EXPECT_TRUE(ok);
SetEvent(event);
// Let the background thread do its business
Sleep(30);
watcher.StopWatching();
loop.RunUntilIdle();
// Our delegate should not have fired.
EXPECT_EQ(1, counter);
CloseHandle(event);
}
void RunTest_SignalBeforeWatch(
test::TaskEnvironment::MainThreadType main_thread_type) {
test::TaskEnvironment task_environment(main_thread_type);
ObjectWatcher watcher;
// A manual-reset event that is signaled before we begin watching.
HANDLE event = CreateEvent(nullptr, TRUE, TRUE, nullptr);
base::RunLoop loop;
QuitDelegate delegate(loop.QuitWhenIdleClosure());
bool ok = watcher.StartWatchingOnce(event, &delegate);
EXPECT_TRUE(ok);
loop.Run();
EXPECT_FALSE(watcher.IsWatching());
CloseHandle(event);
}
void RunTest_OutlivesTaskEnvironment(
test::TaskEnvironment::MainThreadType main_thread_type) {
// Simulate a task environment 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(nullptr, TRUE, FALSE, nullptr); // not signaled
{
ObjectWatcher watcher;
{
test::TaskEnvironment task_environment(main_thread_type);
base::RunLoop loop;
QuitDelegate delegate(loop.QuitWhenIdleClosure());
watcher.StartWatchingOnce(event, &delegate);
}
}
CloseHandle(event);
}
class QuitAfterMultipleDelegate : public ObjectWatcher::Delegate {
public:
QuitAfterMultipleDelegate(HANDLE event,
int iterations,
base::OnceClosure quit_closure)
: event_(event),
iterations_(iterations),
quit_closure_(std::move(quit_closure)) {}
void OnObjectSignaled(HANDLE object) override {
if (--iterations_) {
SetEvent(event_);
} else {
std::move(quit_closure_).Run();
}
}
private:
HANDLE event_;
int iterations_;
base::OnceClosure quit_closure_;
};
void RunTest_ExecuteMultipleTimes(
test::TaskEnvironment::MainThreadType main_thread_type) {
test::TaskEnvironment task_environment(main_thread_type);
ObjectWatcher watcher;
EXPECT_FALSE(watcher.IsWatching());
// An auto-reset event that is not yet signaled.
HANDLE event = CreateEvent(nullptr, FALSE, FALSE, nullptr);
base::RunLoop loop;
QuitAfterMultipleDelegate delegate(event, 2, loop.QuitWhenIdleClosure());
bool ok = watcher.StartWatchingMultipleTimes(event, &delegate);
EXPECT_TRUE(ok);
EXPECT_TRUE(watcher.IsWatching());
EXPECT_EQ(event, watcher.GetWatchedObject());
SetEvent(event);
loop.Run();
EXPECT_TRUE(watcher.IsWatching());
EXPECT_TRUE(watcher.StopWatching());
CloseHandle(event);
}
} // namespace
//-----------------------------------------------------------------------------
TEST(ObjectWatcherTest, BasicSignal) {
RunTest_BasicSignal(test::TaskEnvironment::MainThreadType::DEFAULT);
RunTest_BasicSignal(test::TaskEnvironment::MainThreadType::IO);
RunTest_BasicSignal(test::TaskEnvironment::MainThreadType::UI);
}
TEST(ObjectWatcherTest, BasicCancel) {
RunTest_BasicCancel(test::TaskEnvironment::MainThreadType::DEFAULT);
RunTest_BasicCancel(test::TaskEnvironment::MainThreadType::IO);
RunTest_BasicCancel(test::TaskEnvironment::MainThreadType::UI);
}
TEST(ObjectWatcherTest, CancelAfterSet) {
RunTest_CancelAfterSet(test::TaskEnvironment::MainThreadType::DEFAULT);
RunTest_CancelAfterSet(test::TaskEnvironment::MainThreadType::IO);
RunTest_CancelAfterSet(test::TaskEnvironment::MainThreadType::UI);
}
TEST(ObjectWatcherTest, SignalBeforeWatch) {
RunTest_SignalBeforeWatch(test::TaskEnvironment::MainThreadType::DEFAULT);
RunTest_SignalBeforeWatch(test::TaskEnvironment::MainThreadType::IO);
RunTest_SignalBeforeWatch(test::TaskEnvironment::MainThreadType::UI);
}
TEST(ObjectWatcherTest, OutlivesTaskEnvironment) {
RunTest_OutlivesTaskEnvironment(
test::TaskEnvironment::MainThreadType::DEFAULT);
RunTest_OutlivesTaskEnvironment(test::TaskEnvironment::MainThreadType::IO);
RunTest_OutlivesTaskEnvironment(test::TaskEnvironment::MainThreadType::UI);
}
TEST(ObjectWatcherTest, ExecuteMultipleTimes) {
RunTest_ExecuteMultipleTimes(test::TaskEnvironment::MainThreadType::DEFAULT);
RunTest_ExecuteMultipleTimes(test::TaskEnvironment::MainThreadType::IO);
RunTest_ExecuteMultipleTimes(test::TaskEnvironment::MainThreadType::UI);
}
} // namespace win
} // namespace base
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