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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/btm/persistent_repeating_timer.h"
#include <memory>
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/task/sequenced_task_runner.h"
#include "base/test/task_environment.h"
#include "base/time/time.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
namespace {
// How long calls to SlowStorage::{Get,Set}LastFired() take.
constexpr base::TimeDelta kStorageDelay = base::Minutes(1);
// The delay between executions of the PersistentRepeatingTimer.
constexpr base::TimeDelta kTimerDelay = base::Hours(2);
// Storage that takes `kStorageDelay` for reads/writes to happen.
class SlowStorage : public PersistentRepeatingTimer::Storage {
public:
explicit SlowStorage(std::optional<base::Time> time = std::nullopt)
: time_(time) {}
void GetLastFired(TimeCallback callback) const override {
base::SequencedTaskRunner::GetCurrentDefault()->PostDelayedTask(
FROM_HERE,
base::BindOnce(&SlowStorage::GetImpl, base::Unretained(this),
std::move(callback)),
kStorageDelay);
}
void SetLastFired(base::Time time) override {
base::SequencedTaskRunner::GetCurrentDefault()->PostDelayedTask(
FROM_HERE,
base::BindOnce(&SlowStorage::SetImpl, base::Unretained(this), time),
kStorageDelay);
}
private:
void SetImpl(base::Time time) { time_ = time; }
void GetImpl(TimeCallback callback) const { std::move(callback).Run(time_); }
std::optional<base::Time> time_;
};
} // namespace
class PersistentRepeatingTimerTest : public ::testing::Test {
public:
void RunTask() { ++call_count_; }
void CheckCallCount(int call_count) {
base::RunLoop().RunUntilIdle();
EXPECT_EQ(call_count, call_count_);
}
base::test::TaskEnvironment task_environment_{
base::test::TaskEnvironment::TimeSource::MOCK_TIME};
int call_count_ = 0;
};
// Checks that the missing pref is treated like an old one.
TEST_F(PersistentRepeatingTimerTest, MissingPref) {
PersistentRepeatingTimer timer(
std::make_unique<SlowStorage>(), kTimerDelay,
base::BindRepeating(&PersistentRepeatingTimerTest::RunTask,
base::Unretained(this)));
CheckCallCount(0);
// The task is run immediately on start.
timer.Start();
CheckCallCount(0);
task_environment_.FastForwardBy(kStorageDelay);
CheckCallCount(1);
task_environment_.FastForwardBy(base::Minutes(1));
CheckCallCount(1);
// And after the delay.
task_environment_.FastForwardBy(kTimerDelay);
CheckCallCount(2);
}
// Checks that spurious calls to Start() have no effect.
TEST_F(PersistentRepeatingTimerTest, MultipleStarts) {
PersistentRepeatingTimer timer(
std::make_unique<SlowStorage>(), kTimerDelay,
base::BindRepeating(&PersistentRepeatingTimerTest::RunTask,
base::Unretained(this)));
CheckCallCount(0);
// The task is run immediately on start.
timer.Start();
CheckCallCount(0);
timer.Start();
CheckCallCount(0);
task_environment_.FastForwardBy(kStorageDelay);
CheckCallCount(1);
task_environment_.FastForwardBy(base::Minutes(1));
CheckCallCount(1);
task_environment_.FastForwardBy(base::Minutes(1));
timer.Start();
CheckCallCount(1);
// And after the delay.
task_environment_.FastForwardBy(kTimerDelay);
CheckCallCount(2);
timer.Start();
CheckCallCount(2);
}
TEST_F(PersistentRepeatingTimerTest, RecentPref) {
PersistentRepeatingTimer timer(
std::make_unique<SlowStorage>(base::Time::Now() - base::Hours(1)),
kTimerDelay,
base::BindRepeating(&PersistentRepeatingTimerTest::RunTask,
base::Unretained(this)));
CheckCallCount(0);
// The task is NOT run immediately on start.
timer.Start();
CheckCallCount(0);
task_environment_.FastForwardBy(kStorageDelay);
CheckCallCount(0);
task_environment_.FastForwardBy(base::Minutes(1));
CheckCallCount(0);
// It is run after te delay.
task_environment_.FastForwardBy(base::Hours(1));
CheckCallCount(1);
task_environment_.FastForwardBy(base::Hours(1));
CheckCallCount(1);
task_environment_.FastForwardBy(base::Hours(1));
CheckCallCount(2);
}
TEST_F(PersistentRepeatingTimerTest, OldPref) {
PersistentRepeatingTimer timer(
std::make_unique<SlowStorage>(base::Time::Now() - base::Hours(10)),
kTimerDelay,
base::BindRepeating(&PersistentRepeatingTimerTest::RunTask,
base::Unretained(this)));
CheckCallCount(0);
// The task is run immediately on start.
timer.Start();
CheckCallCount(0);
task_environment_.FastForwardBy(kStorageDelay);
CheckCallCount(1);
task_environment_.FastForwardBy(base::Minutes(1));
CheckCallCount(1);
// And after the delay.
task_environment_.FastForwardBy(kTimerDelay);
CheckCallCount(2);
}
} // namespace content
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