text: // Copyright (c) 2012 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 "base/prefs/pref_service.h"
  #include "base/strings/string16.h"
  #include "base/strings/utf_string_conversions.h"
  #include "chrome/browser/profiles/profile.h"
  #include "chrome/browser/ui/browser.h"
  #include "chrome/browser/ui/tabs/tab_strip_model.h"
  #include "chrome/common/pref_names.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/test/browser_test_utils.h"
  
  typedef InProcessBrowserTest DoNotTrackTest;
  
  // Check that the DNT header is sent when the corresponding preference is set.
  IN_PROC_BROWSER_TEST_F(DoNotTrackTest, Simple) {
    ASSERT_TRUE(test_server()->Start());
  
    PrefService* prefs = browser()->profile()->GetPrefs();
    prefs->SetBoolean(prefs::kEnableDoNotTrack, true);
  
    GURL url = test_server()->GetURL("echoheader?DNT");
    ui_test_utils::NavigateToURL(browser(), url);
  
    int matches = ui_test_utils::FindInPage(
        browser()->tab_strip_model()->GetActiveWebContents(),
        base::string16(ASCIIToUTF16("1")),
        true /* forward */, false /* match case */, NULL /* ordinal */,
        NULL /* selection_rect */);
  
    EXPECT_EQ(1, matches);
  }
  
  // Check that the DNT header is preserved during redirects.
  IN_PROC_BROWSER_TEST_F(DoNotTrackTest, Redirect) {
    ASSERT_TRUE(test_server()->Start());
  
    PrefService* prefs = browser()->profile()->GetPrefs();
    prefs->SetBoolean(prefs::kEnableDoNotTrack, true);
  
    GURL final_url = test_server()->GetURL("echoheader?DNT");
    GURL url = test_server()->GetURL(
        std::string("server-redirect?") + final_url.spec());
    ui_test_utils::NavigateToURL(browser(), url);
  
    int matches = ui_test_utils::FindInPage(
        browser()->tab_strip_model()->GetActiveWebContents(),
        base::string16(ASCIIToUTF16("1")),
        true /* forward */, false /* match case */, NULL /* ordinal */,
        NULL /* selection_rect */);
  
    EXPECT_EQ(1, matches);
  }
  
  // Check that the DOM property is set when the corresponding preference is set.
  IN_PROC_BROWSER_TEST_F(DoNotTrackTest, DOMProperty) {
    PrefService* prefs = browser()->profile()->GetPrefs();
    prefs->SetBoolean(prefs::kEnableDoNotTrack, true);
  
    ASSERT_NO_FATAL_FAILURE(content::WaitForLoadStop(
        browser()->tab_strip_model()->GetActiveWebContents()));
  
    std::string do_not_track;
    EXPECT_TRUE(content::ExecuteScriptAndExtractString(
        browser()->tab_strip_model()->GetActiveWebContents(),
        "window.domAutomationController.send(navigator.doNotTrack)",
        &do_not_track));
    EXPECT_EQ("1", do_not_track);
  
    // Reset flag and check that the changed value is propagated to the existing
    // renderer.
    prefs->SetBoolean(prefs::kEnableDoNotTrack, false);
  
    EXPECT_TRUE(content::ExecuteScriptAndExtractString(
        browser()->tab_strip_model()->GetActiveWebContents(),
        "window.domAutomationController.send("
        "    navigator.doNotTrack === null ? '0' : '1')",
        &do_not_track));
    EXPECT_EQ("0", do_not_track);
  }
  