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// Copyright 2019 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/platform/media/learning_experiment_helper.h"
#include <memory>
#include "base/memory/raw_ptr.h"
#include "media/learning/common/learning_task_controller.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace blink {
using ::media::learning::FeatureDictionary;
using ::media::learning::FeatureValue;
using ::media::learning::FeatureVector;
using ::media::learning::LearningTask;
using ::media::learning::LearningTaskController;
using ::media::learning::ObservationCompletion;
using ::media::learning::TargetValue;
using ::testing::_;
class MockLearningTaskController : public LearningTaskController {
public:
explicit MockLearningTaskController(const LearningTask& task) : task_(task) {}
MockLearningTaskController(const MockLearningTaskController&) = delete;
MockLearningTaskController& operator=(const MockLearningTaskController&) =
delete;
~MockLearningTaskController() override = default;
MOCK_METHOD4(BeginObservation,
void(base::UnguessableToken id,
const FeatureVector& features,
const std::optional<TargetValue>& default_value,
const std::optional<ukm::SourceId>& source_id));
MOCK_METHOD2(CompleteObservation,
void(base::UnguessableToken id,
const ObservationCompletion& completion));
MOCK_METHOD1(CancelObservation, void(base::UnguessableToken id));
MOCK_METHOD2(UpdateDefaultTarget,
void(base::UnguessableToken id,
const std::optional<TargetValue>& default_target));
MOCK_METHOD2(PredictDistribution,
void(const FeatureVector& features, PredictionCB callback));
const LearningTask& GetLearningTask() override { return task_; }
private:
LearningTask task_;
};
class LearningExperimentHelperTest : public testing::Test {
public:
void SetUp() override {
const std::string feature_name_1("feature 1");
const FeatureValue feature_value_1("feature value 1");
const std::string feature_name_2("feature 2");
const FeatureValue feature_value_2("feature value 2");
const std::string feature_name_3("feature 3");
const FeatureValue feature_value_3("feature value 3");
dict_.Add(feature_name_1, feature_value_1);
dict_.Add(feature_name_2, feature_value_2);
dict_.Add(feature_name_3, feature_value_3);
task_.feature_descriptions.push_back({"some other feature"});
task_.feature_descriptions.push_back({feature_name_3});
task_.feature_descriptions.push_back({feature_name_1});
std::unique_ptr<MockLearningTaskController> controller =
std::make_unique<MockLearningTaskController>(task_);
controller_raw_ = controller.get();
helper_ = std::make_unique<LearningExperimentHelper>(std::move(controller));
}
LearningTask task_;
std::unique_ptr<LearningExperimentHelper> helper_;
raw_ptr<MockLearningTaskController> controller_raw_ = nullptr;
FeatureDictionary dict_;
};
TEST_F(LearningExperimentHelperTest, BeginComplete) {
EXPECT_CALL(*controller_raw_, BeginObservation(_, _, _, _));
helper_->BeginObservation(dict_);
TargetValue target(123);
EXPECT_CALL(*controller_raw_,
CompleteObservation(_, ObservationCompletion(target)))
.Times(1);
helper_->CompleteObservationIfNeeded(target);
// Make sure that a second Complete doesn't send anything.
testing::Mock::VerifyAndClear(controller_raw_);
EXPECT_CALL(*controller_raw_,
CompleteObservation(_, ObservationCompletion(target)))
.Times(0);
helper_->CompleteObservationIfNeeded(target);
}
TEST_F(LearningExperimentHelperTest, BeginCancel) {
EXPECT_CALL(*controller_raw_, BeginObservation(_, _, _, _));
helper_->BeginObservation(dict_);
EXPECT_CALL(*controller_raw_, CancelObservation(_));
helper_->CancelObservationIfNeeded();
}
TEST_F(LearningExperimentHelperTest, CompleteWithoutBeginDoesNothing) {
EXPECT_CALL(*controller_raw_, BeginObservation(_, _, _, _)).Times(0);
EXPECT_CALL(*controller_raw_, CompleteObservation(_, _)).Times(0);
EXPECT_CALL(*controller_raw_, CancelObservation(_)).Times(0);
helper_->CompleteObservationIfNeeded(TargetValue(123));
}
TEST_F(LearningExperimentHelperTest, CancelWithoutBeginDoesNothing) {
EXPECT_CALL(*controller_raw_, BeginObservation(_, _, _, _)).Times(0);
EXPECT_CALL(*controller_raw_, CompleteObservation(_, _)).Times(0);
EXPECT_CALL(*controller_raw_, CancelObservation(_)).Times(0);
helper_->CancelObservationIfNeeded();
}
TEST_F(LearningExperimentHelperTest, DoesNothingWithoutController) {
// Make sure that nothing crashes if there's no controller.
LearningExperimentHelper helper(nullptr);
// Begin / complete.
helper_->BeginObservation(dict_);
TargetValue target(123);
helper_->CompleteObservationIfNeeded(target);
// Begin / cancel.
helper_->BeginObservation(dict_);
helper_->CancelObservationIfNeeded();
// Cancel without begin.
helper_->CancelObservationIfNeeded();
}
} // namespace blink
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