Refactoring ConstructLanguageDetectionEvent.

components/translate/core/common/language_detection_logging_helper_unittest.cc

Index: components/translate/core/common/language_detection_logging_helper_unittest.cc
diff --git a/components/translate/core/common/language_detection_logging_helper_unittest.cc b/components/translate/core/common/language_detection_logging_helper_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6dc27c098ce4f28afecad35d2e511150b4145f52
--- /dev/null
+++ b/components/translate/core/common/language_detection_logging_helper_unittest.cc
@@ -0,0 +1,51 @@
+// 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/language_detection_logging_helper.h"
+
+#include <string>
+
+#include "components/sync/protocol/user_event_specifics.pb.h"
+#include "components/translate/core/common/language_detection_details.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace translate {
+
+// Tests that sync_pb::UserEventSpecifics is correctly build.
+TEST(LanguageDetectionLoggingHelperTest, ConstructUserEventSpecifics) {
+  LanguageDetectionDetails details;
+  details.cld_language = "en";
+  details.is_cld_reliable = false;
+  details.adopted_language = "ja";
+  // Expected language detection.
+  sync_pb::LanguageDetection lang_detection;
+  auto* const lang = lang_detection.add_detected_languages();
+  lang->set_language_code(details.cld_language);
+  lang->set_is_reliable(details.is_cld_reliable);
+  lang_detection.set_adopted_language_code(details.adopted_language);
+  const std::unique_ptr<sync_pb::UserEventSpecifics> user_event =
+      ConstructLanguageDetectionEvent(details);
+  EXPECT_EQ(user_event->language_detection().SerializeAsString(),
+            lang_detection.SerializeAsString());
+}
+
+// Tests that sync_pb::UserEventSpecifics is correctly build.
+// If adopted_language is the same as cld_language, we don't set it.
+TEST(LanguageDetectionLoggingHelperTest, DontSetAdoptedLanguage) {
+  LanguageDetectionDetails details;
+  details.cld_language = "en";
+  details.is_cld_reliable = true;
+  details.adopted_language = "en";
+  // Expected language detection.
+  sync_pb::LanguageDetection lang_detection;
+  auto* const lang = lang_detection.add_detected_languages();
+  lang->set_language_code(details.cld_language);
+  lang->set_is_reliable(details.is_cld_reliable);
+  const std::unique_ptr<sync_pb::UserEventSpecifics> user_event =
+      ConstructLanguageDetectionEvent(details);
+  EXPECT_EQ(user_event->language_detection().SerializeAsString(),
+            lang_detection.SerializeAsString());
+}
+
+}  // namespace translate