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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/reporting/util/wrapped_rate_limiter.h"
#include <memory>
#include "base/memory/raw_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/task_environment.h"
#include "components/reporting/util/rate_limiter_interface.h"
#include "components/reporting/util/test_support_callbacks.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using ::testing::_;
using ::testing::Eq;
using ::testing::Return;
using ::testing::UnorderedElementsAre;
namespace reporting {
namespace {
class MockRateLimiter : public RateLimiterInterface {
public:
MOCK_METHOD(bool, Acquire, (size_t /*event_size*/), (override));
};
class WrappedRateLimiterTest : public ::testing::Test {
protected:
void SetUp() override {
auto rate_limiter = std::make_unique<MockRateLimiter>();
mock_rate_limiter_ = rate_limiter.get();
wrapped_rate_limiter_ = WrappedRateLimiter::Create(std::move(rate_limiter));
async_acquire_cb_ = wrapped_rate_limiter_->async_acquire_cb();
}
base::test::TaskEnvironment task_environment_;
base::HistogramTester histogram_tester_;
WrappedRateLimiter::SmartPtr wrapped_rate_limiter_{
nullptr, base::OnTaskRunnerDeleter(nullptr)};
WrappedRateLimiter::AsyncAcquireCb async_acquire_cb_;
raw_ptr<MockRateLimiter> mock_rate_limiter_;
};
TEST_F(WrappedRateLimiterTest, SuccessfulAcquire) {
EXPECT_CALL(*mock_rate_limiter_, Acquire(_)).WillOnce(Return(true));
test::TestEvent<bool> acuire_event;
async_acquire_cb_.Run(123U, acuire_event.cb());
EXPECT_TRUE(acuire_event.result());
EXPECT_THAT(histogram_tester_.GetAllSamples(
WrappedRateLimiter::kRateLimitedEventsUma),
UnorderedElementsAre(base::Bucket(true, 1)));
}
TEST_F(WrappedRateLimiterTest, RejectedAcquire) {
EXPECT_CALL(*mock_rate_limiter_, Acquire(_)).WillOnce(Return(false));
test::TestEvent<bool> acuire_event;
async_acquire_cb_.Run(123U, acuire_event.cb());
EXPECT_FALSE(acuire_event.result());
EXPECT_THAT(histogram_tester_.GetAllSamples(
WrappedRateLimiter::kRateLimitedEventsUma),
UnorderedElementsAre(base::Bucket(false, 1)));
}
TEST_F(WrappedRateLimiterTest, MultipleCalls) {
EXPECT_CALL(*mock_rate_limiter_, Acquire(_))
.WillOnce(Return(true))
.WillOnce(Return(false))
.WillOnce(Return(true))
.WillOnce(Return(false))
.WillOnce(Return(true));
{
test::TestEvent<bool> acuire_event;
async_acquire_cb_.Run(123U, acuire_event.cb());
EXPECT_TRUE(acuire_event.result());
EXPECT_THAT(histogram_tester_.GetAllSamples(
WrappedRateLimiter::kRateLimitedEventsUma),
UnorderedElementsAre(base::Bucket(true, 1)));
}
{
test::TestEvent<bool> acuire_event;
async_acquire_cb_.Run(123U, acuire_event.cb());
EXPECT_FALSE(acuire_event.result());
EXPECT_THAT(
histogram_tester_.GetAllSamples(
WrappedRateLimiter::kRateLimitedEventsUma),
UnorderedElementsAre(base::Bucket(true, 1), base::Bucket(false, 1)));
}
{
test::TestEvent<bool> acuire_event;
async_acquire_cb_.Run(123U, acuire_event.cb());
EXPECT_TRUE(acuire_event.result());
EXPECT_THAT(
histogram_tester_.GetAllSamples(
WrappedRateLimiter::kRateLimitedEventsUma),
UnorderedElementsAre(base::Bucket(true, 2), base::Bucket(false, 1)));
}
{
test::TestEvent<bool> acuire_event;
async_acquire_cb_.Run(123U, acuire_event.cb());
EXPECT_FALSE(acuire_event.result());
EXPECT_THAT(
histogram_tester_.GetAllSamples(
WrappedRateLimiter::kRateLimitedEventsUma),
UnorderedElementsAre(base::Bucket(true, 2), base::Bucket(false, 2)));
}
{
test::TestEvent<bool> acuire_event;
async_acquire_cb_.Run(123U, acuire_event.cb());
EXPECT_TRUE(acuire_event.result());
EXPECT_THAT(
histogram_tester_.GetAllSamples(
WrappedRateLimiter::kRateLimitedEventsUma),
UnorderedElementsAre(base::Bucket(true, 3), base::Bucket(false, 2)));
}
}
TEST_F(WrappedRateLimiterTest, AcquireAfterDestruction) {
test::TestEvent<bool> acuire_event;
mock_rate_limiter_ = nullptr;
wrapped_rate_limiter_.reset();
async_acquire_cb_.Run(123U, acuire_event.cb());
EXPECT_FALSE(acuire_event.result());
EXPECT_THAT(histogram_tester_.GetAllSamples(
WrappedRateLimiter::kRateLimitedEventsUma),
UnorderedElementsAre(base::Bucket(false, 1)));
}
} // namespace
} // namespace reporting
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