Implementation of translation event logging.

components/translate/core/common/translation_logging_helper_unittest.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/translate/core/common/translation_logging_helper.h"
+
+#include <string>
+
+#include "base/logging.h"
+#include "components/metrics/proto/translate_event.pb.h"
+#include "components/sync/protocol/user_event_specifics.pb.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+typedef testing::Test TranslationLoggingHelperTest;
+
+using metrics::TranslateEventProto;
+using sync_pb::Translation;
+
+void EqualTranslationProto(const Translation& first,
+                           const Translation& second) {
+  EXPECT_EQ(first.from_language_code(), second.from_language_code());
+  EXPECT_EQ(first.to_language_code(), second.to_language_code());
+  EXPECT_EQ(first.interaction(), second.interaction());
+}
+
+// Tests that UserEventSpecifics is correctly built.
+TEST_F(TranslationLoggingHelperTest, ConstructUserEventSpecifics) {
+  // The event we have.
+  TranslateEventProto translation_event;
+  translation_event.set_source_language("ja");
+  translation_event.set_target_language("en");
+  translation_event.set_event_type(TranslateEventProto::USER_DECLINE);
+  // Expected user_event.
+  Translation user_translation_event;
+  user_translation_event.set_from_language_code("ja");
+  user_translation_event.set_to_language_code("en");
+  user_translation_event.set_interaction(Translation::DECLINE);
+  // The user event.
+  sync_pb::UserEventSpecifics user_specifics;
+  const bool needs_logging =
+      translate::ConstructTranslateEvent(translation_event, &user_specifics);
+  EXPECT_TRUE(needs_logging);
+  EqualTranslationProto(user_translation_event, user_specifics.translation());
+}
+
+// Tests that if user change the target language, the event is MANUAL.
+TEST_F(TranslationLoggingHelperTest, UserManualEvent) {
+  // The event we have.
+  TranslateEventProto translation_event;
+  translation_event.set_source_language("ja");
+  translation_event.set_target_language("en");
+  translation_event.set_modified_target_language("fr");
+  translation_event.set_event_type(TranslateEventProto::USER_ACCEPT);
+  // Expected user_event.
+  Translation user_translation_event;
+  user_translation_event.set_from_language_code("ja");
+  user_translation_event.set_to_language_code("fr");
+  user_translation_event.set_interaction(Translation::MANUAL);
+  // The user event.
+  sync_pb::UserEventSpecifics user_specifics;
+  const bool needs_logging =
+      translate::ConstructTranslateEvent(translation_event, &user_specifics);
+  EXPECT_TRUE(needs_logging);
+  EqualTranslationProto(user_translation_event, user_specifics.translation());
+}
+
+// Tests that we don't build unnecessary events.
+TEST_F(TranslationLoggingHelperTest, DontBuildUnnecessaryEvent) {
+  // The event we have.
+  TranslateEventProto translation_event;
+  translation_event.set_source_language("ja");
+  translation_event.set_target_language("en");
+  // The event we don't care.
+  translation_event.set_event_type(TranslateEventProto::DISABLED_BY_RANKER);
+  // The user event.
+  sync_pb::UserEventSpecifics user_specifics;
+  const bool needs_logging =
+      translate::ConstructTranslateEvent(translation_event, &user_specifics);
+  // We don't expect the event to be logged.
+  EXPECT_FALSE(needs_logging);
+}