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// Copyright 2021 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/blink/renderer/modules/ad_auction/join_leave_queue.h"
#include <memory>
#include <vector>
#include "base/functional/bind.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/platform/testing/task_environment.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
namespace blink {
class JoinLeaveQueueTest : public testing::Test {
public:
JoinLeaveQueueTest()
: queue_(std::make_unique<JoinLeaveQueue<int>>(
/*max_active=*/2,
WTF::BindRepeating(&JoinLeaveQueueTest::Start,
base::Unretained(this)))) {}
protected:
void Start(int&& i) { start_order_.push_back(i); }
test::TaskEnvironment task_environment_;
std::unique_ptr<JoinLeaveQueue<int>> queue_;
std::vector<int> start_order_;
};
TEST_F(JoinLeaveQueueTest, Basic) {
EXPECT_EQ(0, queue_->num_active_for_testing());
queue_->Enqueue(0);
EXPECT_THAT(start_order_, testing::ElementsAre(0));
EXPECT_EQ(1, queue_->num_active_for_testing());
queue_->Enqueue(1);
EXPECT_THAT(start_order_, testing::ElementsAre(0, 1));
EXPECT_EQ(2, queue_->num_active_for_testing());
queue_->OnComplete();
queue_->OnComplete();
EXPECT_THAT(start_order_, testing::ElementsAre(0, 1));
EXPECT_EQ(0, queue_->num_active_for_testing());
}
TEST_F(JoinLeaveQueueTest, ExceedsLimit) {
queue_->Enqueue(0);
queue_->Enqueue(1);
queue_->Enqueue(2);
queue_->Enqueue(3);
queue_->Enqueue(4);
EXPECT_THAT(start_order_, testing::ElementsAre(0, 1));
EXPECT_EQ(2, queue_->num_active_for_testing());
queue_->OnComplete();
EXPECT_THAT(start_order_, testing::ElementsAre(0, 1, 2));
EXPECT_EQ(2, queue_->num_active_for_testing());
queue_->OnComplete();
EXPECT_THAT(start_order_, testing::ElementsAre(0, 1, 2, 3));
EXPECT_EQ(2, queue_->num_active_for_testing());
queue_->OnComplete();
EXPECT_THAT(start_order_, testing::ElementsAre(0, 1, 2, 3, 4));
EXPECT_EQ(2, queue_->num_active_for_testing());
queue_->OnComplete();
EXPECT_THAT(start_order_, testing::ElementsAre(0, 1, 2, 3, 4));
EXPECT_EQ(1, queue_->num_active_for_testing());
queue_->OnComplete();
EXPECT_THAT(start_order_, testing::ElementsAre(0, 1, 2, 3, 4));
EXPECT_EQ(0, queue_->num_active_for_testing());
}
TEST_F(JoinLeaveQueueTest, DestroyedWithRequestsQueued) {
queue_->Enqueue(0);
queue_->Enqueue(1);
queue_->Enqueue(2);
queue_->Enqueue(3);
EXPECT_THAT(start_order_, testing::ElementsAre(0, 1));
EXPECT_EQ(2, queue_->num_active_for_testing());
queue_.reset();
EXPECT_THAT(start_order_, testing::ElementsAre(0, 1));
}
} // namespace blink
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