Add a browser test for the chrome://site-engagement WebUI.

chrome/browser/ui/webui/engagement/site_engagement_ui_browsertest.cc

Index: chrome/browser/ui/webui/engagement/site_engagement_ui_browsertest.cc
diff --git a/chrome/browser/ui/webui/engagement/site_engagement_ui_browsertest.cc b/chrome/browser/ui/webui/engagement/site_engagement_ui_browsertest.cc
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index 0000000000000000000000000000000000000000..c9090e1701b5510ba65b6f1216bef5f90071846e
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+++ b/chrome/browser/ui/webui/engagement/site_engagement_ui_browsertest.cc
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+// Copyright 2015 The Chromium Authors. All rights reserved.

[dominickn, 2017/03/29 07:46:33]

2017 for a new file? :)

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/command_line.h"
+#include "chrome/browser/engagement/site_engagement_service.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_commands.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/browser/ui/webui/chrome_web_ui_controller_factory.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/child_process_security_policy.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/common/content_switches.h"
+#include "content/public/test/browser_test_utils.h"
+#include "content/public/test/test_utils.h"
+
+using SiteEngagementUiBrowserTest = InProcessBrowserTest;
+
+IN_PROC_BROWSER_TEST_F(SiteEngagementUiBrowserTest, Basic) {
+  // Fake some activity to populate site engagement scores.
+  SiteEngagementService* service =
+      SiteEngagementService::Get(browser()->profile());
+
+  const GURL kExampleUrl = GURL("http://www.example.com/");
+  service->ResetBaseScoreForURL(kExampleUrl, service->GetMaxPoints());
+
+  // Navigate a tab to the site engagement WebUI.
+  content::WebContents* web_contents =
+      browser()->tab_strip_model()->GetActiveWebContents();
+
+  const GURL web_ui_url(std::string(content::kChromeUIScheme) + "://" +
+                        std::string(chrome::kChromeUISiteEngagementHost));
+  EXPECT_TRUE(ChromeWebUIControllerFactory::GetInstance()->UseWebUIForURL(
+      web_contents->GetBrowserContext(), web_ui_url));
+  ui_test_utils::NavigateToURL(browser(), web_ui_url);
+  EXPECT_TRUE(
+      content::ChildProcessSecurityPolicy::GetInstance()->HasWebUIBindings(
+          web_contents->GetRenderProcessHost()->GetID()));
+  EXPECT_TRUE(content::WaitForLoadStop(web_contents));
+
+  // Scrape the set of 'origin-cell' elements, and verify that there is exactly
+  // one, and that it contains our example URL.
+  bool found_example_site = false;
+  ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
+      browser()->tab_strip_model()->GetActiveWebContents(),
+      "window.setPagePopulatedCallbackForTest(function() {"
+      "  var origin_cells = "
+      "Array.from(document.getElementsByClassName('origin-cell'));"
+      "  var found = origin_cells.reduce(function(found, element) {"
+      "      return found || (element.innerHTML == 'http://www.example.com/');"
+      "    }, false);"
+      "  window.domAutomationController.send(found);"
+      "});",
+      &found_example_site));
+  EXPECT_TRUE(found_example_site);
+}