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content / browser / media / session / media_players_callback_aggregator_unittest.cc [blame]
// 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/media/session/media_players_callback_aggregator.h"
#include "base/not_fatal_until.h"
#include "base/run_loop.h"
#include "base/task/single_thread_task_runner.h"
#include "base/test/task_environment.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
namespace {
// A simple `FakeMediaSession` class to simulate GetVisibility. This class takes
// as a constructor a vector of `desired_visibilities`, where the indices
// represent `player_id` s and the values the desired visibility to return to
// callers.
//
// This class also uses `PostTask` during `SimulateGetVisibility` to simulate
// asynchronous behavior.
class FakeMediaSession {
public:
using TaskCb = base::OnceCallback<void(bool)>;
explicit FakeMediaSession(std::vector<bool> const& desired_visibilities) {
for (size_t index = 0; index < desired_visibilities.size(); ++index) {
bool desired_visibility = desired_visibilities[index];
fake_players_.insert(std::pair{index, desired_visibility});
}
}
FakeMediaSession(const FakeMediaSession&) = delete;
FakeMediaSession(FakeMediaSession&&) = delete;
FakeMediaSession& operator=(const FakeMediaSession&) = delete;
void SimulateGetVisibility(
scoped_refptr<MediaPlayersCallbackAggregator> aggregator) {
total_players_count_ = base::saturated_cast<int>(fake_players_.size());
callbacks_executed_count_ = 0;
done_ = false;
for (const auto fake_player : fake_players_) {
int player_id = fake_player.first;
TaskCb task = aggregator->CreateVisibilityCallback();
// base::Unretained() is safe since no callbacks will be executed after
// exiting the `RunLoop`.
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(&FakeMediaSession::OnRequestVisibility,
base::Unretained(this), player_id, std::move(task)));
}
WaitUntilDone();
}
void OnRequestVisibility(int player_id,
base::OnceCallback<void(bool)> get_visibility_cb) {
auto it = fake_players_.find(player_id);
CHECK(it != fake_players_.end(), base::NotFatalUntil::M130);
bool desired_visibility = it->second;
std::move(get_visibility_cb).Run(desired_visibility);
callbacks_executed_count_++;
if (desired_visibility ||
callbacks_executed_count_ == total_players_count_) {
done_ = true;
wait_until_done_loop_.Quit();
}
}
void WaitUntilDone() {
if (done_ || callbacks_executed_count_ == total_players_count_) {
return;
}
wait_until_done_loop_.Run();
}
int TotalPlayersCount() const { return total_players_count_; }
int CallbacksExecutedCount() const { return callbacks_executed_count_; }
private:
std::map<int, bool> fake_players_;
base::RunLoop wait_until_done_loop_;
bool done_ = false;
int total_players_count_ = 0;
int callbacks_executed_count_ = 0;
};
class MediaPlayersCallbackAggregatorTest : public testing::Test {
public:
using ReportVisibilityCb = base::OnceCallback<void(bool)>;
MediaPlayersCallbackAggregatorTest() = default;
MediaPlayersCallbackAggregatorTest(
const MediaPlayersCallbackAggregatorTest&) = delete;
MediaPlayersCallbackAggregatorTest(MediaPlayersCallbackAggregatorTest&&) =
delete;
MediaPlayersCallbackAggregatorTest& operator=(
const MediaPlayersCallbackAggregatorTest&) = delete;
scoped_refptr<MediaPlayersCallbackAggregator> CreateAggregator() {
// base::Unretained() is safe since `ReportVisibilityCb` will always be
// executed at destruction time (if it is not null).
ReportVisibilityCb report_visibility_cb =
base::BindOnce(&MediaPlayersCallbackAggregatorTest::GetVisibility,
base::Unretained(this));
return MakeRefCounted<MediaPlayersCallbackAggregator>(
std::move(report_visibility_cb));
}
void GetVisibility(bool meets_visibility) {
meets_visibility_ = meets_visibility;
report_visibility_cb_executed_ = true;
}
void WaitUntilReportVisibilityCbRuns() {
if (report_visibility_cb_executed_) {
return;
}
wait_until_report_visibility_cb_runs_loop_.Run();
}
bool ReportVisibilityCbExecuted() const {
return report_visibility_cb_executed_;
}
bool MeetsVisibility() const { return meets_visibility_; }
private:
base::test::SingleThreadTaskEnvironment task_environment_;
base::RunLoop wait_until_report_visibility_cb_runs_loop_;
bool report_visibility_cb_executed_ = false;
bool meets_visibility_ = false;
};
} // anonymous namespace
TEST_F(MediaPlayersCallbackAggregatorTest, DoesNotCrashWithEmptyPlayers) {
// Create fake media session with no players.
FakeMediaSession fake_media_session({});
// Simulate get visibility and verify that: no players were created and, no
// callbacks were executed.
fake_media_session.SimulateGetVisibility(CreateAggregator());
EXPECT_EQ(0, fake_media_session.TotalPlayersCount());
EXPECT_EQ(0, fake_media_session.CallbacksExecutedCount());
// Wait for ReportVisibilityCb to run and verify expectations.
WaitUntilReportVisibilityCbRuns();
EXPECT_TRUE(ReportVisibilityCbExecuted());
EXPECT_FALSE(MeetsVisibility());
}
TEST_F(MediaPlayersCallbackAggregatorTest, MultiplePlayersAllMeetVisibility) {
// Create fake media session with multiple players. All players meet
// visibility.
FakeMediaSession fake_media_session({true, true, true});
// Simulate get visibility and verify that: all players were created and, a
// single TaskCb is executed.
fake_media_session.SimulateGetVisibility(CreateAggregator());
EXPECT_EQ(3, fake_media_session.TotalPlayersCount());
EXPECT_EQ(1, fake_media_session.CallbacksExecutedCount());
// Wait for ReportVisibilityCb to run and verify expectations.
WaitUntilReportVisibilityCbRuns();
EXPECT_TRUE(ReportVisibilityCbExecuted());
EXPECT_TRUE(MeetsVisibility());
}
TEST_F(MediaPlayersCallbackAggregatorTest,
MultiplePlayersAllDoNotMeetVisibility) {
// Create fake media session with multiple players. All players do not meet
// visibility.
FakeMediaSession fake_media_session({false, false, false});
// Simulate get visibility and verify that: all players were created and, all
// TaskCb s are executed.
fake_media_session.SimulateGetVisibility(CreateAggregator());
EXPECT_EQ(3, fake_media_session.TotalPlayersCount());
EXPECT_EQ(3, fake_media_session.CallbacksExecutedCount());
// Wait for ReportVisibilityCb to run and verify expectations.
WaitUntilReportVisibilityCbRuns();
EXPECT_TRUE(ReportVisibilityCbExecuted());
EXPECT_FALSE(MeetsVisibility());
}
TEST_F(MediaPlayersCallbackAggregatorTest, MultiplePlayersSomeMeetVisibility) {
// Create fake media session with multiple players. Some of the players meet
// visibility.
FakeMediaSession fake_media_session({false, false, false, true, true});
// Simulate get visibility and verify that: all players were created and,
// TaskCb s stop executing once the first player that meets visibility is
// found.
fake_media_session.SimulateGetVisibility(CreateAggregator());
EXPECT_EQ(5, fake_media_session.TotalPlayersCount());
EXPECT_EQ(4, fake_media_session.CallbacksExecutedCount());
// Wait for ReportVisibilityCb to run and verify expectations.
WaitUntilReportVisibilityCbRuns();
EXPECT_TRUE(ReportVisibilityCbExecuted());
EXPECT_TRUE(MeetsVisibility());
}
TEST_F(MediaPlayersCallbackAggregatorTest,
MultiplePlayersStopsAtFirstMeetVisibility) {
// Create fake media session with multiple players. Only the first player
// meets visibility.
FakeMediaSession fake_media_session({true, false, false, false, false});
// Simulate get visibility and verify that: all players were created and,
// TaskCb s stop executing once the first player that meets visibility is
// found.
fake_media_session.SimulateGetVisibility(CreateAggregator());
EXPECT_EQ(5, fake_media_session.TotalPlayersCount());
EXPECT_EQ(1, fake_media_session.CallbacksExecutedCount());
// Wait for ReportVisibilityCb to run and verify expectations.
WaitUntilReportVisibilityCbRuns();
EXPECT_TRUE(ReportVisibilityCbExecuted());
EXPECT_TRUE(MeetsVisibility());
}
} // namespace content