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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/webrtc_overrides/coalesced_tasks.h"
#include <string>
#include <vector>
#include "base/time/time.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace blink {
using ::testing::ElementsAre;
using ::testing::MockFunction;
TEST(CoalescedTasksTest, TaskRunInOrder) {
std::vector<std::string> run_tasks;
MockFunction<void()> first_callback;
EXPECT_CALL(first_callback, Call()).WillOnce([&]() {
run_tasks.emplace_back("first");
});
MockFunction<void()> second_callback;
EXPECT_CALL(second_callback, Call()).WillOnce([&]() {
run_tasks.emplace_back("second");
});
MockFunction<void()> third_callback;
EXPECT_CALL(third_callback, Call()).WillOnce([&]() {
run_tasks.emplace_back("third");
});
base::TimeTicks now;
base::TimeTicks scheduled_time = now + base::Milliseconds(10);
CoalescedTasks coalesced_tasks;
coalesced_tasks.QueueDelayedTask(now + base::Milliseconds(5),
second_callback.AsStdFunction(),
scheduled_time);
coalesced_tasks.QueueDelayedTask(now + base::Milliseconds(1),
first_callback.AsStdFunction(),
scheduled_time);
coalesced_tasks.QueueDelayedTask(now + base::Milliseconds(9),
third_callback.AsStdFunction(),
scheduled_time);
coalesced_tasks.RunScheduledTasks(scheduled_time);
EXPECT_THAT(run_tasks, ElementsAre("first", "second", "third"));
}
TEST(CoalescedTasksTest, OnlyReadyTasksRun) {
std::vector<std::string> run_tasks;
MockFunction<void()> first_callback;
EXPECT_CALL(first_callback, Call()).WillOnce([&]() {
run_tasks.emplace_back("first");
});
MockFunction<void()> second_callback;
EXPECT_CALL(second_callback, Call()).WillOnce([&]() {
run_tasks.emplace_back("second");
});
MockFunction<void()> third_callback;
EXPECT_CALL(third_callback, Call()).WillOnce([&]() {
run_tasks.emplace_back("third");
});
base::TimeTicks now;
base::TimeTicks first_scheduled_time = now + base::Milliseconds(10);
base::TimeTicks second_scheduled_time = now + base::Milliseconds(20);
CoalescedTasks coalesced_tasks;
coalesced_tasks.QueueDelayedTask(now + base::Milliseconds(11),
third_callback.AsStdFunction(),
second_scheduled_time);
coalesced_tasks.QueueDelayedTask(now + base::Milliseconds(9),
first_callback.AsStdFunction(),
first_scheduled_time);
coalesced_tasks.QueueDelayedTask(now + base::Milliseconds(10),
second_callback.AsStdFunction(),
first_scheduled_time);
coalesced_tasks.RunScheduledTasks(first_scheduled_time);
EXPECT_THAT(run_tasks, ElementsAre("first", "second"));
run_tasks.clear();
coalesced_tasks.RunScheduledTasks(second_scheduled_time);
EXPECT_THAT(run_tasks, ElementsAre("third"));
run_tasks.clear();
}
TEST(CoalescedTasksTest, QueueDelayedTaskReturnsTrueWhenSchedulingIsNeeded) {
MockFunction<void()> dummy_callback;
EXPECT_CALL(dummy_callback, Call()).WillRepeatedly([]() {});
base::TimeTicks now;
base::TimeTicks first_scheduled_time = now + base::Milliseconds(1);
base::TimeTicks second_scheduled_time = now + base::Milliseconds(2);
CoalescedTasks coalesced_tasks;
// `second_scheduled_time` needs to be scheduled.
EXPECT_TRUE(coalesced_tasks.QueueDelayedTask(second_scheduled_time,
dummy_callback.AsStdFunction(),
second_scheduled_time));
// `second_scheduled_time` does not need to be scheduled multiple times.
EXPECT_FALSE(coalesced_tasks.QueueDelayedTask(second_scheduled_time,
dummy_callback.AsStdFunction(),
second_scheduled_time));
// `first_scheduled_time` needs to be scheduled.
EXPECT_TRUE(coalesced_tasks.QueueDelayedTask(first_scheduled_time,
dummy_callback.AsStdFunction(),
first_scheduled_time));
// `first_scheduled_time` does not need to be scheduled multiple times.
EXPECT_FALSE(coalesced_tasks.QueueDelayedTask(first_scheduled_time,
dummy_callback.AsStdFunction(),
first_scheduled_time));
coalesced_tasks.RunScheduledTasks(first_scheduled_time);
// `first_scheduled_time` is no longer scheduled, so this returns true.
EXPECT_TRUE(coalesced_tasks.QueueDelayedTask(first_scheduled_time,
dummy_callback.AsStdFunction(),
first_scheduled_time));
// `second_scheduled_time` is still scheduled.
EXPECT_FALSE(coalesced_tasks.QueueDelayedTask(second_scheduled_time,
dummy_callback.AsStdFunction(),
second_scheduled_time));
coalesced_tasks.RunScheduledTasks(second_scheduled_time);
// `second_scheduled_time` is no longer scheduled, so this returns true.
EXPECT_TRUE(coalesced_tasks.QueueDelayedTask(second_scheduled_time,
dummy_callback.AsStdFunction(),
second_scheduled_time));
coalesced_tasks.Clear();
}
TEST(CoalescedTasksTest, PrepareAndFinalizeCallbacks) {
std::vector<std::string> run_tasks;
CoalescedTasks::PrepareRunTaskCallback prepare_callback = base::BindRepeating(
[](std::vector<std::string>* run_tasks) {
run_tasks->emplace_back("prepare");
return std::optional<base::TimeTicks>(base::TimeTicks() +
base::Milliseconds(1337));
},
base::Unretained(&run_tasks));
MockFunction<void()> task_callback;
EXPECT_CALL(task_callback, Call()).WillOnce([&]() {
run_tasks.emplace_back("task");
});
CoalescedTasks::FinalizeRunTaskCallback finalize_callback =
base::BindRepeating(
[](std::vector<std::string>* run_tasks,
std::optional<base::TimeTicks> ticks) {
run_tasks->emplace_back("finalize");
// Ticks should be the same value that `prepare_callback` returned.
EXPECT_TRUE(ticks.has_value());
EXPECT_EQ(ticks.value(),
base::TimeTicks() + base::Milliseconds(1337));
},
base::Unretained(&run_tasks));
base::TimeTicks now;
CoalescedTasks coalesced_tasks;
coalesced_tasks.QueueDelayedTask(now, task_callback.AsStdFunction(), now);
coalesced_tasks.RunScheduledTasks(now, prepare_callback, finalize_callback);
EXPECT_THAT(run_tasks, ElementsAre("prepare", "task", "finalize"));
}
} // namespace blink
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