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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/components/quick_answers/utils/language_detector.h"
#include <memory>
#include <string>
#include "base/functional/bind.h"
#include "base/test/scoped_feature_list.h"
#include "base/test/task_environment.h"
#include "base/test/test_future.h"
#include "chromeos/components/quick_answers/quick_answers_model.h"
#include "chromeos/components/quick_answers/utils/quick_answers_utils.h"
#include "chromeos/services/machine_learning/public/mojom/machine_learning_service.mojom.h"
#include "chromeos/services/machine_learning/public/mojom/text_classifier.mojom.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace quick_answers {
namespace {
using ::chromeos::machine_learning::mojom::
REMOVED_TextSuggestSelectionRequestPtr;
using ::chromeos::machine_learning::mojom::TextAnnotationRequestPtr;
using ::chromeos::machine_learning::mojom::TextClassifier;
using ::chromeos::machine_learning::mojom::TextLanguage;
using ::chromeos::machine_learning::mojom::TextLanguagePtr;
TextLanguagePtr DefaultLanguage() {
return TextLanguage::New("en", /*confidence=*/1);
}
} // namespace
class FakeTextClassifier
: public chromeos::machine_learning::mojom::TextClassifier {
public:
FakeTextClassifier() = default;
~FakeTextClassifier() override = default;
// chromeos::machine_learning::mojom::TextClassifier:
void Annotate(TextAnnotationRequestPtr request,
AnnotateCallback callback) override {}
void FindLanguages(const std::string& text,
FindLanguagesCallback callback) override {
std::vector<TextLanguagePtr> languages;
const auto it = detection_results_.find(text);
if (it == detection_results_.end()) {
languages.push_back(DefaultLanguage());
std::move(callback).Run(std::move(languages));
return;
}
languages.push_back(it->second.Clone());
std::move(callback).Run(std::move(languages));
}
void RegisterDetectionResult(std::string text, TextLanguagePtr language) {
detection_results_[text] = std::move(language);
}
void REMOVED_1(REMOVED_TextSuggestSelectionRequestPtr request,
REMOVED_1Callback callback) override {}
private:
std::map<std::string, TextLanguagePtr> detection_results_;
};
class LanguageDetectorTest : public testing::Test {
public:
LanguageDetectorTest() : language_detector_(&text_classifier_) {}
LanguageDetectorTest(const LanguageDetectorTest&) = delete;
LanguageDetectorTest& operator=(const LanguageDetectorTest&) = delete;
const std::optional<std::string>& DetectLanguage(
const std::string& surrounding_text,
const std::string& selected_text) {
base::test::TestFuture<std::optional<std::string>> future;
language_detector_.DetectLanguage(surrounding_text, selected_text,
future.GetCallback());
detected_locale_ = future.Take();
return detected_locale_;
}
FakeTextClassifier* text_classifier() { return &text_classifier_; }
private:
base::test::TaskEnvironment task_environment_;
std::optional<std::string> detected_locale_;
FakeTextClassifier text_classifier_;
LanguageDetector language_detector_;
base::test::ScopedFeatureList scoped_feature_list_;
};
TEST_F(LanguageDetectorTest, DetectLanguage) {
std::string selected_text = "entrada de prueba";
std::string surrounding_text = "otros textos entrada de prueba otros textos";
text_classifier()->RegisterDetectionResult(selected_text,
TextLanguage::New("es", 0.95));
text_classifier()->RegisterDetectionResult(surrounding_text,
TextLanguage::New("es", 1));
auto detected_locale = DetectLanguage(surrounding_text, selected_text);
EXPECT_EQ(detected_locale, "es");
}
TEST_F(LanguageDetectorTest, DetectLanguageShouldPreferSelectedTexts) {
std::string selected_text = "entrada de prueba";
std::string surrounding_text = "周围的文字 entrada de prueba 周围的文字";
text_classifier()->RegisterDetectionResult(selected_text,
TextLanguage::New("es", 0.95));
text_classifier()->RegisterDetectionResult(surrounding_text,
TextLanguage::New("zh", 0.98));
auto detected_locale = DetectLanguage(surrounding_text, selected_text);
// Should prefer selected texts for the detected locale.
EXPECT_EQ(detected_locale, "es");
}
TEST_F(LanguageDetectorTest, DetectLanguageFallbackToSurroundingTexts) {
std::string selected_text = "immagini";
std::string surrounding_text =
"Cerca informazioni in tutto il mondo come pagine web, immagini, video, "
"ecc.";
text_classifier()->RegisterDetectionResult(selected_text,
TextLanguage::New("la", 0.6));
text_classifier()->RegisterDetectionResult(surrounding_text,
TextLanguage::New("it", 0.98));
auto detected_locale = DetectLanguage(surrounding_text, selected_text);
// Should fallback to surrounding texts result since the confidence level for
// the detected result of selected texts is too low.
EXPECT_EQ(detected_locale, "it");
}
TEST_F(LanguageDetectorTest, DetectLanguageLowConfidence) {
std::string selected_text = "video";
std::string surrounding_text = "web, immagini, video, ecc";
text_classifier()->RegisterDetectionResult(selected_text,
TextLanguage::New("es", 0.4));
text_classifier()->RegisterDetectionResult(surrounding_text,
TextLanguage::New("it", 0.4));
auto detected_locale = DetectLanguage(surrounding_text, selected_text);
// Should return empty result since the confidence level is too low.
EXPECT_FALSE(detected_locale.has_value());
}
} // namespace quick_answers
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