text: // Copyright 2016 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 <string>
  
  #include "chrome/browser/ui/browser.h"
  #include "chrome/browser/ui/hats/hats_service_factory.h"
  #include "chrome/browser/ui/hats/mock_hats_service.h"
  #include "chrome/browser/ui/tabs/tab_strip_model.h"
  #include "chrome/browser/ui/webui/settings/settings_ui.h"
  #include "chrome/common/url_constants.h"
  #include "chrome/test/base/in_process_browser_test.h"
  #include "chrome/test/base/ui_test_utils.h"
  #include "content/public/browser/web_contents.h"
  #include "content/public/browser/web_ui.h"
  #include "content/public/browser/web_ui_message_handler.h"
  #include "content/public/common/url_constants.h"
  #include "content/public/test/browser_test.h"
  #include "url/gurl.h"
  
  typedef InProcessBrowserTest SettingsUITest;
  
  using ::testing::_;
  using ui_test_utils::NavigateToURL;
  
  IN_PROC_BROWSER_TEST_F(SettingsUITest, ViewSourceDoesntCrash) {
    ASSERT_TRUE(NavigateToURL(
        browser(),
        GURL(content::kViewSourceScheme + std::string(":") +
             chrome::kChromeUISettingsURL + std::string("strings.js"))));
  }
  
  // Catch lifetime issues in message handlers. There was previously a problem
  // with PrefMember calling Init again after Destroy.
  IN_PROC_BROWSER_TEST_F(SettingsUITest, ToggleJavaScript) {
    ASSERT_TRUE(NavigateToURL(browser(), GURL(chrome::kChromeUISettingsURL)));
  
    const auto& handlers = *browser()
                                ->tab_strip_model()
                                ->GetActiveWebContents()
                                ->GetWebUI()
                                ->GetHandlersForTesting();
  
    for (const std::unique_ptr<content::WebUIMessageHandler>& handler :
         handlers) {
      handler->AllowJavascriptForTesting();
      handler->DisallowJavascript();
      handler->AllowJavascriptForTesting();
    }
  }
  
  IN_PROC_BROWSER_TEST_F(SettingsUITest, TriggerHappinessTrackingSurveys) {
    MockHatsService* mock_hats_service_ = static_cast<MockHatsService*>(
        HatsServiceFactory::GetInstance()->SetTestingFactoryAndUse(
            browser()->profile(), base::BindRepeating(&BuildMockHatsService)));
    EXPECT_CALL(*mock_hats_service_,
                LaunchDelayedSurveyForWebContents(kHatsSurveyTriggerSettings, _,
                                                  _, _, _, _));
    ASSERT_TRUE(NavigateToURL(browser(), GURL(chrome::kChromeUISettingsURL)));
    base::RunLoop().RunUntilIdle();
  }
  