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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "components/translate/core/browser/translate_ranker_impl.h" |
| 6 |
| 7 #include <initializer_list> |
| 8 #include <memory> |
| 9 |
| 10 #include "base/feature_list.h" |
| 11 #include "base/memory/ptr_util.h" |
| 12 #include "base/message_loop/message_loop.h" |
| 13 #include "base/run_loop.h" |
| 14 #include "base/strings/stringprintf.h" |
| 15 #include "base/task_scheduler/post_task.h" |
| 16 #include "base/test/scoped_feature_list.h" |
| 17 #include "base/test/scoped_task_scheduler.h" |
| 18 #include "components/metrics/proto/translate_event.pb.h" |
| 19 #include "components/prefs/scoped_user_pref_update.h" |
| 20 #include "components/sync_preferences/testing_pref_service_syncable.h" |
| 21 #include "components/translate/core/browser/proto/ranker_model.pb.h" |
| 22 #include "components/translate/core/browser/proto/translate_ranker_model.pb.h" |
| 23 #include "components/translate/core/browser/ranker_model.h" |
| 24 #include "components/translate/core/browser/translate_download_manager.h" |
| 25 #include "components/translate/core/browser/translate_prefs.h" |
| 26 #include "net/url_request/test_url_fetcher_factory.h" |
| 27 #include "net/url_request/url_request_test_util.h" |
| 28 #include "testing/gtest/include/gtest/gtest.h" |
| 29 |
| 30 namespace { |
| 31 |
| 32 using translate::kTranslateRankerEnforcement; |
| 33 using translate::kTranslateRankerLogging; |
| 34 using translate::kTranslateRankerQuery; |
| 35 using translate::TranslateDownloadManager; |
| 36 using translate::TranslateRankerFeatures; |
| 37 using translate::TranslatePrefs; |
| 38 using translate::TranslateRankerImpl; |
| 39 |
| 40 class TranslateRankerImplTest : public ::testing::Test { |
| 41 protected: |
| 42 TranslateRankerImplTest(); |
| 43 |
| 44 void SetUp() override; |
| 45 |
| 46 void TearDown() override; |
| 47 |
| 48 // Initializes the explicitly |enabled| and |disabled| features for this test. |
| 49 void InitFeatures(const std::initializer_list<base::Feature>& enabled, |
| 50 const std::initializer_list<base::Feature>& disabled); |
| 51 |
| 52 // Returns a TranslateRankerImpl object with |bias| for testing. |
| 53 std::unique_ptr<TranslateRankerImpl> GetRankerForTest(float bias); |
| 54 |
| 55 // Implements the same sigmoid function used by TranslateRankerImpl. |
| 56 static double Sigmoid(double x); |
| 57 |
| 58 // Returns a translate event initialized with the given parameters. |
| 59 static metrics::TranslateEventProto CreateTranslateEvent( |
| 60 const std::string& src_lang, |
| 61 const std::string& dst_lang, |
| 62 int accept_count, |
| 63 int decline_count, |
| 64 int ignore_count); |
| 65 |
| 66 // The platform-specific name of the preferred language pref. |
| 67 static const char* const kPreferredLanguagePref; |
| 68 |
| 69 // Prefs. |
| 70 std::unique_ptr<sync_preferences::TestingPrefServiceSyncable> prefs_; |
| 71 std::unique_ptr<translate::TranslatePrefs> translate_prefs_; |
| 72 |
| 73 private: |
| 74 // Override the default URL fetcher to return custom responses for tests. |
| 75 net::TestURLFetcherFactory url_fetcher_factory_; |
| 76 |
| 77 // Used to initialize the translate download manager. |
| 78 scoped_refptr<net::TestURLRequestContextGetter> request_context_; |
| 79 |
| 80 // Sets up the task scheduling/task-runner environment for each test. |
| 81 base::test::ScopedTaskScheduler scoped_task_scheduler_; |
| 82 |
| 83 // Manages the enabling/disabling of features within the scope of a test. |
| 84 base::test::ScopedFeatureList scoped_feature_list_; |
| 85 |
| 86 // Cache and reset the application locale for each test. |
| 87 std::string locale_; |
| 88 |
| 89 DISALLOW_COPY_AND_ASSIGN(TranslateRankerImplTest); |
| 90 }; |
| 91 |
| 92 const char* const TranslateRankerImplTest::kPreferredLanguagePref = |
| 93 #if defined(OS_CHROMEOS) |
| 94 "settings.language.preferred_languages"; |
| 95 #else |
| 96 nullptr; |
| 97 #endif |
| 98 |
| 99 TranslateRankerImplTest::TranslateRankerImplTest() {} |
| 100 |
| 101 void TranslateRankerImplTest::SetUp() { |
| 102 // Setup the translate download manager. |
| 103 locale_ = TranslateDownloadManager::GetInstance()->application_locale(); |
| 104 request_context_ = |
| 105 new net::TestURLRequestContextGetter(base::ThreadTaskRunnerHandle::Get()); |
| 106 TranslateDownloadManager::GetInstance()->set_application_locale("zh-CN"); |
| 107 TranslateDownloadManager::GetInstance()->set_request_context( |
| 108 request_context_.get()); |
| 109 |
| 110 // Setup a 50/50 accepted/denied count for "english" when initialize the |
| 111 // prefs and translate prefs. |
| 112 base::DictionaryValue lang_count; |
| 113 lang_count.SetInteger("en", 50); |
| 114 prefs_.reset(new sync_preferences::TestingPrefServiceSyncable()); |
| 115 TranslatePrefs::RegisterProfilePrefs(prefs_->registry()); |
| 116 prefs_->Set(TranslatePrefs::kPrefTranslateAcceptedCount, lang_count); |
| 117 prefs_->Set(TranslatePrefs::kPrefTranslateDeniedCount, lang_count); |
| 118 translate_prefs_.reset(new TranslatePrefs( |
| 119 prefs_.get(), "intl.accept_languages", kPreferredLanguagePref)); |
| 120 translate_prefs_->SetCountry("de"); |
| 121 } |
| 122 |
| 123 void TranslateRankerImplTest::TearDown() { |
| 124 base::RunLoop().RunUntilIdle(); |
| 125 TranslateDownloadManager::GetInstance()->set_application_locale(locale_); |
| 126 TranslateDownloadManager::GetInstance()->set_request_context(nullptr); |
| 127 } |
| 128 |
| 129 void TranslateRankerImplTest::InitFeatures( |
| 130 const std::initializer_list<base::Feature>& enabled, |
| 131 const std::initializer_list<base::Feature>& disabled) { |
| 132 scoped_feature_list_.InitWithFeatures(enabled, disabled); |
| 133 } |
| 134 |
| 135 std::unique_ptr<TranslateRankerImpl> TranslateRankerImplTest::GetRankerForTest( |
| 136 float bias) { |
| 137 auto model = base::MakeUnique<chrome_intelligence::RankerModel>(); |
| 138 auto* details = model->mutable_proto() |
| 139 ->mutable_translate() |
| 140 ->mutable_logistic_regression_model(); |
| 141 details->set_bias(bias); |
| 142 details->set_accept_ratio_weight(0.02f); |
| 143 details->set_decline_ratio_weight(0.03f); |
| 144 details->set_accept_count_weight(0.13f); |
| 145 details->set_decline_count_weight(-0.14f); |
| 146 |
| 147 auto& src_language_weight = *details->mutable_source_language_weight(); |
| 148 src_language_weight["en"] = 0.04f; |
| 149 src_language_weight["fr"] = 0.05f; |
| 150 src_language_weight["zh"] = 0.06f; |
| 151 |
| 152 auto& dest_language_weight = *details->mutable_dest_language_weight(); |
| 153 dest_language_weight["UNKNOWN"] = 0.00f; |
| 154 |
| 155 auto& country_weight = *details->mutable_country_weight(); |
| 156 country_weight["de"] = 0.07f; |
| 157 country_weight["ca"] = 0.08f; |
| 158 country_weight["cn"] = 0.09f; |
| 159 |
| 160 auto& locale_weight = *details->mutable_locale_weight(); |
| 161 locale_weight["en-us"] = 0.10f; |
| 162 locale_weight["en-ca"] = 0.11f; |
| 163 locale_weight["zh-cn"] = 0.12f; // Normalized to lowercase. |
| 164 |
| 165 auto impl = base::MakeUnique<TranslateRankerImpl>(base::FilePath(), GURL()); |
| 166 impl->OnModelAvailable(std::move(model)); |
| 167 base::RunLoop().RunUntilIdle(); |
| 168 return impl; |
| 169 } |
| 170 |
| 171 // static |
| 172 double TranslateRankerImplTest::Sigmoid(double x) { |
| 173 return 1.0 / (1.0 + exp(-x)); |
| 174 } |
| 175 |
| 176 // static |
| 177 metrics::TranslateEventProto TranslateRankerImplTest::CreateTranslateEvent( |
| 178 const std::string& src_lang, |
| 179 const std::string& dst_lang, |
| 180 int accept_count, |
| 181 int decline_count, |
| 182 int ignore_count) { |
| 183 metrics::TranslateEventProto translate_event; |
| 184 translate_event.set_source_language(src_lang); |
| 185 translate_event.set_target_language(dst_lang); |
| 186 translate_event.set_accept_count(accept_count); |
| 187 translate_event.set_decline_count(decline_count); |
| 188 translate_event.set_ignore_count(ignore_count); |
| 189 return translate_event; |
| 190 } |
| 191 |
| 192 } // namespace |
| 193 |
| 194 TEST_F(TranslateRankerImplTest, DisabledByDefault) { |
| 195 InitFeatures({}, {}); |
| 196 auto ranker = GetRankerForTest(0.5); |
| 197 EXPECT_FALSE(ranker->IsQueryEnabled()); |
| 198 EXPECT_FALSE(ranker->IsEnforcementEnabled()); |
| 199 EXPECT_FALSE(ranker->IsLoggingEnabled()); |
| 200 } |
| 201 |
| 202 TEST_F(TranslateRankerImplTest, ExplicitlyDisabled) { |
| 203 InitFeatures({}, {kTranslateRankerQuery, kTranslateRankerEnforcement, |
| 204 kTranslateRankerLogging}); |
| 205 auto ranker = GetRankerForTest(0.5); |
| 206 EXPECT_FALSE(ranker->IsQueryEnabled()); |
| 207 EXPECT_FALSE(ranker->IsEnforcementEnabled()); |
| 208 EXPECT_FALSE(ranker->IsLoggingEnabled()); |
| 209 } |
| 210 |
| 211 TEST_F(TranslateRankerImplTest, EnableQuery) { |
| 212 InitFeatures({kTranslateRankerQuery}, {kTranslateRankerEnforcement}); |
| 213 auto ranker = GetRankerForTest(0.5); |
| 214 EXPECT_TRUE(ranker->IsQueryEnabled()); |
| 215 EXPECT_FALSE(ranker->IsEnforcementEnabled()); |
| 216 EXPECT_FALSE(ranker->IsLoggingEnabled()); |
| 217 } |
| 218 |
| 219 TEST_F(TranslateRankerImplTest, EnableEnforcement) { |
| 220 InitFeatures({kTranslateRankerEnforcement}, {kTranslateRankerQuery}); |
| 221 auto ranker = GetRankerForTest(0.5); |
| 222 EXPECT_FALSE(ranker->IsQueryEnabled()); |
| 223 EXPECT_TRUE(ranker->IsEnforcementEnabled()); |
| 224 EXPECT_FALSE(ranker->IsLoggingEnabled()); |
| 225 } |
| 226 |
| 227 TEST_F(TranslateRankerImplTest, EnableQueryAndEnforcement) { |
| 228 InitFeatures({kTranslateRankerQuery, kTranslateRankerEnforcement}, {}); |
| 229 auto ranker = GetRankerForTest(0.5); |
| 230 EXPECT_TRUE(ranker->IsQueryEnabled()); |
| 231 EXPECT_TRUE(ranker->IsEnforcementEnabled()); |
| 232 EXPECT_FALSE(ranker->IsLoggingEnabled()); |
| 233 } |
| 234 |
| 235 TEST_F(TranslateRankerImplTest, EnableLogging) { |
| 236 InitFeatures({kTranslateRankerLogging}, {}); |
| 237 auto ranker = GetRankerForTest(0.5); |
| 238 EXPECT_FALSE(ranker->IsQueryEnabled()); |
| 239 EXPECT_FALSE(ranker->IsEnforcementEnabled()); |
| 240 EXPECT_TRUE(ranker->IsLoggingEnabled()); |
| 241 } |
| 242 |
| 243 TEST_F(TranslateRankerImplTest, EnableAll) { |
| 244 InitFeatures({kTranslateRankerQuery, kTranslateRankerEnforcement, |
| 245 kTranslateRankerLogging}, |
| 246 {}); |
| 247 auto ranker = GetRankerForTest(0.5); |
| 248 EXPECT_TRUE(ranker->IsQueryEnabled()); |
| 249 EXPECT_TRUE(ranker->IsEnforcementEnabled()); |
| 250 EXPECT_TRUE(ranker->IsLoggingEnabled()); |
| 251 } |
| 252 |
| 253 TEST_F(TranslateRankerImplTest, CalculateScore) { |
| 254 InitFeatures({kTranslateRankerQuery, kTranslateRankerEnforcement}, {}); |
| 255 auto ranker = GetRankerForTest(0.01f); |
| 256 // Calculate the score using: a 50:50 accept/decline ratio; the one-hot |
| 257 // values for the src lang, dest lang, locale and counry; and, the bias. |
| 258 double expected = Sigmoid(50.0 * 0.13f + // accept count * weight |
| 259 50.0 * -0.14f + // decline count * weight |
| 260 0.0 * 0.00f + // ignore count * (default) weight |
| 261 0.5 * 0.02f + // accept ratio * weight |
| 262 0.5 * 0.03f + // decline ratio * weight |
| 263 0.0 * 0.00f + // ignore ratio * (default) weight |
| 264 1.0 * 0.04f + // one-hot src-language "en" * weight |
| 265 1.0 * 0.00f + // one-hot dst-language "fr" * weight |
| 266 1.0 * 0.07f + // one-hot country "de" * weight |
| 267 1.0 * 0.12f + // one-hot locale "zh-CN" * weight |
| 268 0.01f); // bias |
| 269 TranslateRankerFeatures features(50, 50, 0, "en", "fr", "de", "zh-CN"); |
| 270 |
| 271 EXPECT_NEAR(expected, ranker->CalculateScore(features), 0.000001); |
| 272 } |
| 273 |
| 274 TEST_F(TranslateRankerImplTest, ShouldOfferTranslation) { |
| 275 InitFeatures({kTranslateRankerQuery, kTranslateRankerEnforcement}, {}); |
| 276 // With a bias of -0.5 en->fr is not over the threshold. |
| 277 EXPECT_FALSE(GetRankerForTest(-0.5f)->ShouldOfferTranslation( |
| 278 *translate_prefs_, "en", "fr")); |
| 279 // With a bias of 0.25 en-fr is over the threshold. |
| 280 EXPECT_TRUE(GetRankerForTest(0.25f)->ShouldOfferTranslation(*translate_prefs_, |
| 281 "en", "fr")); |
| 282 } |
| 283 |
| 284 TEST_F(TranslateRankerImplTest, RecordAndFlushEvents) { |
| 285 InitFeatures({kTranslateRankerLogging}, {}); |
| 286 std::unique_ptr<translate::TranslateRanker> ranker = GetRankerForTest(0.0f); |
| 287 std::vector<metrics::TranslateEventProto> flushed_events; |
| 288 |
| 289 // Check that flushing an empty cache will return an empty vector. |
| 290 ranker->FlushTranslateEvents(&flushed_events); |
| 291 EXPECT_EQ(0U, flushed_events.size()); |
| 292 |
| 293 ranker->AddTranslateEvent(CreateTranslateEvent("fr", "en", 1, 0, 3)); |
| 294 ranker->AddTranslateEvent(CreateTranslateEvent("jp", "en", 2, 0, 3)); |
| 295 ranker->AddTranslateEvent(CreateTranslateEvent("es", "de", 4, 5, 6)); |
| 296 |
| 297 // Capture the data and verify that it is as expected. |
| 298 ranker->FlushTranslateEvents(&flushed_events); |
| 299 EXPECT_EQ(3U, flushed_events.size()); |
| 300 ASSERT_EQ("fr", flushed_events[0].source_language()); |
| 301 ASSERT_EQ("jp", flushed_events[1].source_language()); |
| 302 ASSERT_EQ("es", flushed_events[2].source_language()); |
| 303 |
| 304 // Check that the cache has been cleared. |
| 305 ranker->FlushTranslateEvents(&flushed_events); |
| 306 EXPECT_EQ(0U, flushed_events.size()); |
| 307 } |
| 308 |
| 309 TEST_F(TranslateRankerImplTest, LoggingDisabled) { |
| 310 InitFeatures({}, {kTranslateRankerLogging}); |
| 311 std::unique_ptr<translate::TranslateRanker> ranker = GetRankerForTest(0.0f); |
| 312 std::vector<metrics::TranslateEventProto> flushed_events; |
| 313 |
| 314 ranker->FlushTranslateEvents(&flushed_events); |
| 315 EXPECT_EQ(0U, flushed_events.size()); |
| 316 |
| 317 ranker->AddTranslateEvent(CreateTranslateEvent("fr", "en", 1, 0, 3)); |
| 318 ranker->AddTranslateEvent(CreateTranslateEvent("jp", "en", 2, 0, 3)); |
| 319 ranker->AddTranslateEvent(CreateTranslateEvent("es", "de", 4, 5, 6)); |
| 320 |
| 321 // Logging is disabled, so no events should be cached. |
| 322 ranker->FlushTranslateEvents(&flushed_events); |
| 323 EXPECT_EQ(0U, flushed_events.size()); |
| 324 } |
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