Quick fix for logging.

chrome/browser/translate/chrome_translate_client_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 "chrome/browser/translate/chrome_translate_client.h"
+
+#include <memory>
+
+#include "base/command_line.h"
+#include "base/memory/ref_counted.h"
+#include "base/run_loop.h"
+#include "chrome/browser/sync/profile_sync_service_factory.h"
+#include "chrome/browser/sync/user_event_service_factory.h"
+#include "chrome/test/base/chrome_render_view_host_test_harness.h"
+#include "components/sync/user_events/fake_user_event_service.h"
+#include "components/translate/core/common/language_detection_details.h"
+#include "content/public/browser/web_contents.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
+
+std::unique_ptr<KeyedService> BuildFakeUserEventService(
+    content::BrowserContext* context) {
+  return base::MakeUnique<syncer::FakeUserEventService>();
+}
+
+class ChromeTranslateClientTest : public ChromeRenderViewHostTestHarness {
+ public:
+  void SetUp() override {
+    ChromeRenderViewHostTestHarness::SetUp();
+    fake_user_event_service_ = static_cast<syncer::FakeUserEventService*>(
+        browser_sync::UserEventServiceFactory::GetInstance()
+            ->SetTestingFactoryAndUse(browser_context(),
+                                      &BuildFakeUserEventService));
+  }
+
+  void TearDown() override { ChromeRenderViewHostTestHarness::TearDown(); }
+
+ protected:
+  syncer::FakeUserEventService* GetUserEventService() {
+    return fake_user_event_service_;
+  }
+
+ private:
+  syncer::FakeUserEventService* fake_user_event_service_;
+};
+
+TEST_F(ChromeTranslateClientTest, LanguageEventShouldRecord) {
+  GURL url("http://yahoo.com");
+  NavigateAndCommit(url);
+  ChromeTranslateClient client(web_contents());
+  translate::LanguageDetectionDetails details;
+  details.cld_language = "en";
+  details.is_cld_reliable = true;
+  details.adopted_language = "en";
+  client.OnLanguageDetermined(details);
+  EXPECT_EQ(1ul, GetUserEventService()->GetRecordedUserEvents().size());
+}
+
+TEST_F(ChromeTranslateClientTest, LanguageEventShouldNotRecord) {
+  GURL url("about://blank");
+  NavigateAndCommit(url);
+  ChromeTranslateClient client(web_contents());
+  translate::LanguageDetectionDetails details;
+  details.cld_language = "en";
+  details.is_cld_reliable = true;
+  details.adopted_language = "en";
+  client.OnLanguageDetermined(details);
+  EXPECT_EQ(0ul, GetUserEventService()->GetRecordedUserEvents().size());

[skym, 2017/06/06 15:46:56]

0ul seems a bit odd here, 0u would work just fine, right?

[renjieliu1, 2017/06/07 00:23:31]

Done.

+}