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/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "os/repeating_alarm.h"
#include <future>
#include "common/bind.h"
#include "gtest/gtest.h"
namespace bluetooth {
namespace os {
namespace {
constexpr int error_ms = 20;
class RepeatingAlarmTest : public ::testing::Test {
protected:
void SetUp() override {
thread_ = new Thread("test_thread", Thread::Priority::NORMAL);
handler_ = new Handler(thread_);
alarm_ = new RepeatingAlarm(handler_);
}
void TearDown() override {
delete alarm_;
handler_->Clear();
delete handler_;
delete thread_;
}
void VerifyMultipleDelayedTasks(int scheduled_tasks, int task_length_ms, int interval_between_tasks_ms) {
std::promise<void> promise;
auto future = promise.get_future();
auto start_time = std::chrono::steady_clock::now();
int counter = 0;
alarm_->Schedule(
common::Bind(
&RepeatingAlarmTest::verify_delayed_tasks,
common::Unretained(this),
common::Unretained(&counter),
start_time,
scheduled_tasks,
common::Unretained(&promise),
task_length_ms,
interval_between_tasks_ms),
std::chrono::milliseconds(interval_between_tasks_ms));
future.get();
alarm_->Cancel();
}
void verify_delayed_tasks(
int* counter,
std::chrono::steady_clock::time_point start_time,
int scheduled_tasks,
std::promise<void>* promise,
int task_length_ms,
int interval_between_tasks_ms) {
*counter = *counter + 1;
auto time_now = std::chrono::steady_clock::now();
auto time_delta = time_now - start_time;
if (*counter == scheduled_tasks) {
promise->set_value();
}
ASSERT_NEAR(time_delta.count(), interval_between_tasks_ms * 1000000 * *counter, error_ms * 1000000);
std::this_thread::sleep_for(std::chrono::milliseconds(task_length_ms));
}
RepeatingAlarm* alarm_;
common::Closure should_not_happen_ = common::Bind([] { ASSERT_TRUE(false); });
private:
Thread* thread_;
Handler* handler_;
};
TEST_F(RepeatingAlarmTest, cancel_while_not_armed) {
alarm_->Cancel();
}
TEST_F(RepeatingAlarmTest, schedule) {
std::promise<void> promise;
auto future = promise.get_future();
auto before = std::chrono::steady_clock::now();
int period_ms = 10;
alarm_->Schedule(
common::Bind(&std::promise<void>::set_value, common::Unretained(&promise)), std::chrono::milliseconds(period_ms));
future.get();
alarm_->Cancel();
auto after = std::chrono::steady_clock::now();
auto duration = after - before;
ASSERT_NEAR(duration.count(), period_ms * 1000000, error_ms * 1000000);
}
TEST_F(RepeatingAlarmTest, cancel_alarm) {
alarm_->Schedule(should_not_happen_, std::chrono::milliseconds(10));
alarm_->Cancel();
std::this_thread::sleep_for(std::chrono::milliseconds(50));
}
TEST_F(RepeatingAlarmTest, cancel_alarm_from_callback) {
alarm_->Schedule(
common::Bind(&RepeatingAlarm::Cancel, common::Unretained(this->alarm_)), std::chrono::milliseconds(1));
std::this_thread::sleep_for(std::chrono::milliseconds(5));
}
TEST_F(RepeatingAlarmTest, schedule_while_alarm_armed) {
alarm_->Schedule(should_not_happen_, std::chrono::milliseconds(1));
std::promise<void> promise;
auto future = promise.get_future();
alarm_->Schedule(
common::Bind(&std::promise<void>::set_value, common::Unretained(&promise)), std::chrono::milliseconds(10));
future.get();
alarm_->Cancel();
}
TEST_F(RepeatingAlarmTest, delete_while_alarm_armed) {
alarm_->Schedule(should_not_happen_, std::chrono::milliseconds(1));
delete alarm_;
alarm_ = nullptr;
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
TEST_F(RepeatingAlarmTest, verify_small) {
VerifyMultipleDelayedTasks(100, 1, 10);
}
TEST_F(RepeatingAlarmTest, verify_large) {
VerifyMultipleDelayedTasks(100, 3, 10);
}
} // namespace
} // namespace os
} // namespace bluetooth
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