src/chrome/browser/errorpage_browsertest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/bind.h"
   6 #include "base/command_line.h"
   7 #include "base/compiler_specific.h"
   8 #include "base/logging.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "base/path_service.h"
  12 #include "base/prefs/pref_service.h"
  13 #include "base/strings/stringprintf.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "base/synchronization/lock.h"
  16 #include "chrome/browser/browsing_data/browsing_data_helper.h"
  17 #include "chrome/browser/browsing_data/browsing_data_remover.h"
  18 #include "chrome/browser/google/google_profile_helper.h"
  19 #include "chrome/browser/net/url_request_mock_util.h"
  20 #include "chrome/browser/profiles/profile.h"
  21 #include "chrome/browser/ui/browser.h"
  22 #include "chrome/browser/ui/browser_commands.h"
  23 #include "chrome/browser/ui/tabs/tab_strip_model.h"
  24 #include "chrome/common/chrome_paths.h"
  25 #include "chrome/common/chrome_switches.h"
  26 #include "chrome/common/pref_names.h"
  27 #include "chrome/grit/generated_resources.h"
  28 #include "chrome/test/base/in_process_browser_test.h"
  29 #include "chrome/test/base/ui_test_utils.h"
  30 #include "components/google/core/browser/google_util.h"
  31 #include "content/public/browser/browser_thread.h"
  32 #include "content/public/browser/notification_service.h"
  33 #include "content/public/browser/notification_types.h"
  34 #include "content/public/browser/render_frame_host.h"
  35 #include "content/public/browser/render_view_host.h"
  36 #include "content/public/browser/web_contents.h"
  37 #include "content/public/browser/web_contents_observer.h"
  38 #include "content/public/test/browser_test_utils.h"
  39 #include "content/public/test/test_navigation_observer.h"
  40 #include "net/base/net_errors.h"
  41 #include "net/base/net_util.h"
  42 #include "net/http/failing_http_transaction_factory.h"
  43 #include "net/http/http_cache.h"
  44 #include "net/test/spawned_test_server/spawned_test_server.h"
  45 #include "net/test/url_request/url_request_failed_job.h"
  46 #include "net/test/url_request/url_request_mock_http_job.h"
  47 #include "net/url_request/url_request_context.h"
  48 #include "net/url_request/url_request_context_getter.h"
  49 #include "net/url_request/url_request_filter.h"
  50 #include "net/url_request/url_request_interceptor.h"
  51 #include "net/url_request/url_request_job.h"
  52 #include "net/url_request/url_request_test_job.h"
  53 #include "net/url_request/url_request_test_util.h"
  54 #include "ui/base/l10n/l10n_util.h"
  55
  56 using content::BrowserThread;
  57 using content::NavigationController;
  58 using net::URLRequestFailedJob;
  59 using net::URLRequestTestJob;
  60
  61 namespace {
  62
  63 // Returns true if |text| is displayed on the page |browser| is currently
  64 // displaying.  Uses "innerText", so will miss hidden text, and whitespace
  65 // space handling may be weird.
  66 bool WARN_UNUSED_RESULT IsDisplayingText(Browser* browser,
  67                                          const std::string& text) {
  68   std::string command = base::StringPrintf(
  69       "var textContent = document.body.innerText;"
  70       "var hasText = textContent.indexOf('%s') >= 0;"
  71       "domAutomationController.send(hasText);",
  72       text.c_str());
  73   bool result = false;
  74   EXPECT_TRUE(content::ExecuteScriptAndExtractBool(
  75       browser->tab_strip_model()->GetActiveWebContents(), command, &result));
  76   return result;
  77 }
  78
  79 // Expands the more box on the currently displayed error page.
  80 void ToggleHelpBox(Browser* browser) {
  81   EXPECT_TRUE(content::ExecuteScript(
  82       browser->tab_strip_model()->GetActiveWebContents(),
  83       "document.getElementById('details-button').click();"));
  84 }
  85
  86 // Returns true if |browser| is displaying the text representation of
  87 // |error_code| on the current page.
  88 bool WARN_UNUSED_RESULT IsDisplayingNetError(Browser* browser,
  89                                              net::Error error_code) {
  90   return IsDisplayingText(browser, net::ErrorToShortString(error_code));
  91 }
  92
  93 // Checks that the local error page is being displayed, without remotely
  94 // retrieved navigation corrections, and with the specified error code.
  95 void ExpectDisplayingLocalErrorPage(Browser* browser, net::Error error_code) {
  96   // Expand the help box so innerText will include text below the fold.
  97   ToggleHelpBox(browser);
  98
  99   EXPECT_TRUE(IsDisplayingNetError(browser, error_code));
 100
 101   // Locally generated error pages should not have navigation corrections.
 102   EXPECT_FALSE(IsDisplayingText(browser, "http://correction1/"));
 103   EXPECT_FALSE(IsDisplayingText(browser, "http://correction2/"));
 104
 105   // Locally generated error pages should not have a populated search box.
 106   bool search_box_populated = false;
 107   ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
 108       browser->tab_strip_model()->GetActiveWebContents(),
 109       "var searchText = document.getElementById('search-box').value;"
 110           "domAutomationController.send(searchText == 'search query');",
 111       &search_box_populated));
 112   EXPECT_FALSE(search_box_populated);
 113 }
 114
 115 // Checks that an error page with information retrieved from the navigation
 116 // correction service is being displayed, with the specified specified error
 117 // code.
 118 void ExpectDisplayingNavigationCorrections(Browser* browser,
 119                                            net::Error error_code) {
 120   // Expand the help box so innerText will include text below the fold.
 121   ToggleHelpBox(browser);
 122
 123   EXPECT_TRUE(IsDisplayingNetError(browser, error_code));
 124
 125   // Check that the mock navigation corrections are displayed.
 126   EXPECT_TRUE(IsDisplayingText(browser, "http://correction1/"));
 127   EXPECT_TRUE(IsDisplayingText(browser, "http://correction2/"));
 128
 129   // Check that the search box is populated correctly.
 130   bool search_box_populated = false;
 131   ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
 132       browser->tab_strip_model()->GetActiveWebContents(),
 133       "var searchText = document.getElementById('search-box').value;"
 134           "domAutomationController.send(searchText == 'search query');",
 135       &search_box_populated));
 136   EXPECT_TRUE(search_box_populated);
 137 }
 138
 139 std::string GetLoadStaleButtonLabel() {
 140   return l10n_util::GetStringUTF8(IDS_ERRORPAGES_BUTTON_LOAD_STALE);
 141 }
 142
 143 void AddInterceptorForURL(
 144     const GURL& url,
 145     scoped_ptr<net::URLRequestInterceptor> handler) {
 146   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 147   net::URLRequestFilter::GetInstance()->AddUrlInterceptor(
 148       url, handler.Pass());
 149 }
 150
 151 // An interceptor that fails a configurable number of requests, then succeeds
 152 // all requests after that, keeping count of failures and successes.
 153 class FailFirstNRequestsInterceptor : public net::URLRequestInterceptor {
 154  public:
 155   explicit FailFirstNRequestsInterceptor(int requests_to_fail)
 156       : requests_(0), failures_(0), requests_to_fail_(requests_to_fail) {}
 157   ~FailFirstNRequestsInterceptor() override {}
 158
 159   // net::URLRequestInterceptor implementation
 160   net::URLRequestJob* MaybeInterceptRequest(
 161       net::URLRequest* request,
 162       net::NetworkDelegate* network_delegate) const override {
 163     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 164     requests_++;
 165     if (failures_ < requests_to_fail_) {
 166       failures_++;
 167       // Note: net::ERR_CONNECTION_RESET does not summon the Link Doctor; see
 168       // NetErrorHelperCore::GetErrorPageURL.
 169       return new URLRequestFailedJob(request,
 170                                      network_delegate,
 171                                      net::ERR_CONNECTION_RESET);
 172     } else {
 173       return new URLRequestTestJob(request, network_delegate,
 174                                    URLRequestTestJob::test_headers(),
 175                                    URLRequestTestJob::test_data_1(),
 176                                    true);
 177     }
 178   }
 179
 180   int requests() const { return requests_; }
 181   int failures() const { return failures_; }
 182
 183  private:
 184   // These are mutable because MaybeCreateJob is const but we want this state
 185   // for testing.
 186   mutable int requests_;
 187   mutable int failures_;
 188   int requests_to_fail_;
 189
 190   DISALLOW_COPY_AND_ASSIGN(FailFirstNRequestsInterceptor);
 191 };
 192
 193 // An interceptor that serves LinkDoctor responses.  It also allows waiting
 194 // until a certain number of requests have been sent.
 195 // TODO(mmenke):  Wait until responses have been received instead.
 196 class LinkDoctorInterceptor : public net::URLRequestInterceptor {
 197  public:
 198   LinkDoctorInterceptor() : num_requests_(0),
 199                             requests_to_wait_for_(-1),
 200                             weak_factory_(this) {
 201   }
 202
 203   ~LinkDoctorInterceptor() override {}
 204
 205   // net::URLRequestInterceptor implementation
 206   net::URLRequestJob* MaybeInterceptRequest(
 207       net::URLRequest* request,
 208       net::NetworkDelegate* network_delegate) const override {
 209     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 210
 211     BrowserThread::PostTask(
 212         BrowserThread::UI, FROM_HERE,
 213         base::Bind(&LinkDoctorInterceptor::RequestCreated,
 214                    weak_factory_.GetWeakPtr()));
 215
 216     base::FilePath root_http;
 217     PathService::Get(chrome::DIR_TEST_DATA, &root_http);
 218     return new net::URLRequestMockHTTPJob(
 219         request,
 220         network_delegate,
 221         root_http.AppendASCII("mock-link-doctor.json"),
 222         BrowserThread::GetBlockingPool()->GetTaskRunnerWithShutdownBehavior(
 223             base::SequencedWorkerPool::SKIP_ON_SHUTDOWN));
 224   }
 225
 226   void WaitForRequests(int requests_to_wait_for) {
 227     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 228     DCHECK_EQ(-1, requests_to_wait_for_);
 229     DCHECK(!run_loop_);
 230
 231     if (requests_to_wait_for >= num_requests_)
 232       return;
 233
 234     requests_to_wait_for_ = requests_to_wait_for;
 235     run_loop_.reset(new base::RunLoop());
 236     run_loop_->Run();
 237     run_loop_.reset();
 238     requests_to_wait_for_ = -1;
 239     EXPECT_EQ(num_requests_, requests_to_wait_for);
 240   }
 241
 242   // It is up to the caller to wait until all relevant requests has been
 243   // created, either through calling WaitForRequests or some other manner,
 244   // before calling this method.
 245   int num_requests() const {
 246     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 247     return num_requests_;
 248   }
 249
 250  private:
 251   void RequestCreated() {
 252     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 253
 254     num_requests_++;
 255     if (num_requests_ == requests_to_wait_for_)
 256       run_loop_->Quit();
 257   }
 258
 259   // These are only used on the UI thread.
 260   int num_requests_;
 261   int requests_to_wait_for_;
 262   scoped_ptr<base::RunLoop> run_loop_;
 263
 264   // This prevents any risk of flake if any test doesn't wait for a request
 265   // it sent.  Mutable so it can be accessed from a const function.
 266   mutable base::WeakPtrFactory<LinkDoctorInterceptor> weak_factory_;
 267
 268   DISALLOW_COPY_AND_ASSIGN(LinkDoctorInterceptor);
 269 };
 270
 271 void InstallMockInterceptors(
 272     const GURL& search_url,
 273     scoped_ptr<net::URLRequestInterceptor> link_doctor_interceptor) {
 274   chrome_browser_net::SetUrlRequestMocksEnabled(true);
 275
 276   AddInterceptorForURL(google_util::LinkDoctorBaseURL(),
 277                        link_doctor_interceptor.Pass());
 278
 279   // Add a mock for the search engine the error page will use.
 280   base::FilePath root_http;
 281   PathService::Get(chrome::DIR_TEST_DATA, &root_http);
 282   net::URLRequestMockHTTPJob::AddHostnameToFileHandler(
 283       search_url.host(),
 284       root_http.AppendASCII("title3.html"),
 285       BrowserThread::GetBlockingPool());
 286 }
 287
 288 class ErrorPageTest : public InProcessBrowserTest {
 289  public:
 290   enum HistoryNavigationDirection {
 291     HISTORY_NAVIGATE_BACK,
 292     HISTORY_NAVIGATE_FORWARD,
 293   };
 294
 295   ErrorPageTest() : link_doctor_interceptor_(NULL) {}
 296   ~ErrorPageTest() override {}
 297
 298   // Navigates the active tab to a mock url created for the file at |file_path|.
 299   // Needed for StaleCacheStatus and StaleCacheStatusFailedCorrections tests.
 300   void SetUpCommandLine(CommandLine* command_line) override {
 301     command_line->AppendSwitch(switches::kEnableOfflineLoadStaleCache);
 302   }
 303
 304   // Navigates the active tab to a mock url created for the file at |file_path|.
 305   void NavigateToFileURL(const base::FilePath::StringType& file_path) {
 306     ui_test_utils::NavigateToURL(
 307         browser(),
 308         net::URLRequestMockHTTPJob::GetMockUrl(base::FilePath(file_path)));
 309   }
 310
 311   // Navigates to the given URL and waits for |num_navigations| to occur, and
 312   // the title to change to |expected_title|.
 313   void NavigateToURLAndWaitForTitle(const GURL& url,
 314                                     const std::string& expected_title,
 315                                     int num_navigations) {
 316     content::TitleWatcher title_watcher(
 317         browser()->tab_strip_model()->GetActiveWebContents(),
 318         base::ASCIIToUTF16(expected_title));
 319
 320     ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 321         browser(), url, num_navigations);
 322
 323     EXPECT_EQ(base::ASCIIToUTF16(expected_title),
 324               title_watcher.WaitAndGetTitle());
 325   }
 326
 327   // Navigates back in the history and waits for |num_navigations| to occur, and
 328   // the title to change to |expected_title|.
 329   void GoBackAndWaitForTitle(const std::string& expected_title,
 330                              int num_navigations) {
 331     NavigateHistoryAndWaitForTitle(expected_title,
 332                                    num_navigations,
 333                                    HISTORY_NAVIGATE_BACK);
 334   }
 335
 336   // Navigates forward in the history and waits for |num_navigations| to occur,
 337   // and the title to change to |expected_title|.
 338   void GoForwardAndWaitForTitle(const std::string& expected_title,
 339                                 int num_navigations) {
 340     NavigateHistoryAndWaitForTitle(expected_title,
 341                                    num_navigations,
 342                                    HISTORY_NAVIGATE_FORWARD);
 343   }
 344
 345   void GoBackAndWaitForNavigations(int num_navigations) {
 346     NavigateHistory(num_navigations, HISTORY_NAVIGATE_BACK);
 347   }
 348
 349   void GoForwardAndWaitForNavigations(int num_navigations) {
 350     NavigateHistory(num_navigations, HISTORY_NAVIGATE_FORWARD);
 351   }
 352
 353   // Confirms that the javascript variable indicating whether or not we have
 354   // a stale copy in the cache has been set to |expected|, and that the
 355   // stale load button is or isn't there based on the same expectation.
 356   testing::AssertionResult ProbeStaleCopyValue(bool expected) {
 357     const char* js_cache_probe =
 358         "try {\n"
 359         "    domAutomationController.send(\n"
 360         "        loadTimeData.valueExists('staleLoadButton') ? 'yes' : 'no');\n"
 361         "} catch (e) {\n"
 362         "    domAutomationController.send(e.message);\n"
 363         "}\n";
 364
 365     std::string result;
 366     bool ret =
 367         content::ExecuteScriptAndExtractString(
 368             browser()->tab_strip_model()->GetActiveWebContents(),
 369             js_cache_probe,
 370             &result);
 371     if (!ret) {
 372       return testing::AssertionFailure()
 373           << "Failing return from ExecuteScriptAndExtractString.";
 374     }
 375
 376     if ((expected && "yes" == result) || (!expected && "no" == result))
 377       return testing::AssertionSuccess();
 378
 379     return testing::AssertionFailure() << "Cache probe result is " << result;
 380   }
 381
 382   testing::AssertionResult ReloadStaleCopyFromCache() {
 383     const char* js_reload_script =
 384         "try {\n"
 385         "    document.getElementById('stale-load-button').click();\n"
 386         "    domAutomationController.send('success');\n"
 387         "} catch (e) {\n"
 388         "    domAutomationController.send(e.message);\n"
 389         "}\n";
 390
 391     std::string result;
 392     bool ret = content::ExecuteScriptAndExtractString(
 393         browser()->tab_strip_model()->GetActiveWebContents(),
 394         js_reload_script,
 395         &result);
 396     EXPECT_TRUE(ret);
 397     if (!ret)
 398       return testing::AssertionFailure();
 399     return ("success" == result ? testing::AssertionSuccess() :
 400             (testing::AssertionFailure() << "Exception message is " << result));
 401   }
 402
 403   LinkDoctorInterceptor* link_doctor_interceptor() {
 404     return link_doctor_interceptor_;
 405   }
 406
 407  protected:
 408   void SetUpOnMainThread() override {
 409     link_doctor_interceptor_ = new LinkDoctorInterceptor();
 410     scoped_ptr<net::URLRequestInterceptor> owned_interceptor(
 411         link_doctor_interceptor_);
 412     // Ownership of the |interceptor_| is passed to an object the IO thread, but
 413     // a pointer is kept in the test fixture.  As soon as anything calls
 414     // URLRequestFilter::ClearHandlers(), |interceptor_| can become invalid.
 415     BrowserThread::PostTask(
 416         BrowserThread::IO, FROM_HERE,
 417         base::Bind(&InstallMockInterceptors,
 418                    google_util::GetGoogleSearchURL(
 419                        google_profile_helper::GetGoogleHomePageURL(
 420                            browser()->profile())),
 421                    base::Passed(&owned_interceptor)));
 422   }
 423
 424   // Returns a GURL that results in a DNS error.
 425   GURL GetDnsErrorURL() const {
 426     return URLRequestFailedJob::GetMockHttpUrl(net::ERR_NAME_NOT_RESOLVED);
 427   }
 428
 429  private:
 430   // Navigates the browser the indicated direction in the history and waits for
 431   // |num_navigations| to occur and the title to change to |expected_title|.
 432   void NavigateHistoryAndWaitForTitle(const std::string& expected_title,
 433                                       int num_navigations,
 434                                       HistoryNavigationDirection direction) {
 435     content::TitleWatcher title_watcher(
 436         browser()->tab_strip_model()->GetActiveWebContents(),
 437         base::ASCIIToUTF16(expected_title));
 438
 439     NavigateHistory(num_navigations, direction);
 440
 441     EXPECT_EQ(title_watcher.WaitAndGetTitle(),
 442               base::ASCIIToUTF16(expected_title));
 443   }
 444
 445   void NavigateHistory(int num_navigations,
 446                        HistoryNavigationDirection direction) {
 447     content::TestNavigationObserver test_navigation_observer(
 448         browser()->tab_strip_model()->GetActiveWebContents(),
 449         num_navigations);
 450     if (direction == HISTORY_NAVIGATE_BACK) {
 451       chrome::GoBack(browser(), CURRENT_TAB);
 452     } else if (direction == HISTORY_NAVIGATE_FORWARD) {
 453       chrome::GoForward(browser(), CURRENT_TAB);
 454     } else {
 455       FAIL();
 456     }
 457     test_navigation_observer.Wait();
 458   }
 459
 460   LinkDoctorInterceptor* link_doctor_interceptor_;
 461 };
 462
 463 class TestFailProvisionalLoadObserver : public content::WebContentsObserver {
 464  public:
 465   explicit TestFailProvisionalLoadObserver(content::WebContents* contents)
 466       : content::WebContentsObserver(contents) {}
 467   ~TestFailProvisionalLoadObserver() override {}
 468
 469   // This method is invoked when the provisional load failed.
 470   void DidFailProvisionalLoad(
 471       content::RenderFrameHost* render_frame_host,
 472       const GURL& validated_url,
 473       int error_code,
 474       const base::string16& error_description) override {
 475     fail_url_ = validated_url;
 476   }
 477
 478   const GURL& fail_url() const { return fail_url_; }
 479
 480  private:
 481   GURL fail_url_;
 482
 483   DISALLOW_COPY_AND_ASSIGN(TestFailProvisionalLoadObserver);
 484 };
 485
 486 void InterceptNetworkTransactions(net::URLRequestContextGetter* getter,
 487                                   net::Error error) {
 488   DCHECK(content::BrowserThread::CurrentlyOn(BrowserThread::IO));
 489   net::HttpCache* cache(
 490       getter->GetURLRequestContext()->http_transaction_factory()->GetCache());
 491   DCHECK(cache);
 492   scoped_ptr<net::HttpTransactionFactory> factory(
 493       new net::FailingHttpTransactionFactory(cache->GetSession(), error));
 494   // Throw away old version; since this is a a browser test, we don't
 495   // need to restore the old state.
 496   cache->SetHttpNetworkTransactionFactoryForTesting(factory.Pass());
 497 }
 498
 499 // Test that a DNS error occuring in the main frame redirects to an error page.
 500 IN_PROC_BROWSER_TEST_F(ErrorPageTest, DNSError_Basic) {
 501   // The first navigation should fail, and the second one should be the error
 502   // page.
 503   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 504        browser(), GetDnsErrorURL(), 2);
 505   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 506   EXPECT_EQ(1, link_doctor_interceptor()->num_requests());
 507 }
 508
 509 // Test that a DNS error occuring in the main frame does not result in an
 510 // additional session history entry.
 511 IN_PROC_BROWSER_TEST_F(ErrorPageTest, DNSError_GoBack1) {
 512   NavigateToFileURL(FILE_PATH_LITERAL("title2.html"));
 513   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 514        browser(), GetDnsErrorURL(), 2);
 515   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 516   GoBackAndWaitForTitle("Title Of Awesomeness", 1);
 517   EXPECT_EQ(1, link_doctor_interceptor()->num_requests());
 518 }
 519
 520 // Test that a DNS error occuring in the main frame does not result in an
 521 // additional session history entry.
 522 IN_PROC_BROWSER_TEST_F(ErrorPageTest, DNSError_GoBack2) {
 523   NavigateToFileURL(FILE_PATH_LITERAL("title2.html"));
 524
 525   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 526        browser(), GetDnsErrorURL(), 2);
 527   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 528   EXPECT_EQ(1, link_doctor_interceptor()->num_requests());
 529
 530   NavigateToFileURL(FILE_PATH_LITERAL("title3.html"));
 531
 532   GoBackAndWaitForNavigations(2);
 533   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 534   EXPECT_EQ(2, link_doctor_interceptor()->num_requests());
 535
 536   GoBackAndWaitForTitle("Title Of Awesomeness", 1);
 537   EXPECT_EQ(2, link_doctor_interceptor()->num_requests());
 538 }
 539
 540 // Test that a DNS error occuring in the main frame does not result in an
 541 // additional session history entry.
 542 IN_PROC_BROWSER_TEST_F(ErrorPageTest, DNSError_GoBack2AndForward) {
 543   NavigateToFileURL(FILE_PATH_LITERAL("title2.html"));
 544
 545   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 546        browser(), GetDnsErrorURL(), 2);
 547   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 548   EXPECT_EQ(1, link_doctor_interceptor()->num_requests());
 549
 550   NavigateToFileURL(FILE_PATH_LITERAL("title3.html"));
 551
 552   GoBackAndWaitForNavigations(2);
 553   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 554   EXPECT_EQ(2, link_doctor_interceptor()->num_requests());
 555
 556   GoBackAndWaitForTitle("Title Of Awesomeness", 1);
 557
 558   GoForwardAndWaitForNavigations(2);
 559   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 560   EXPECT_EQ(3, link_doctor_interceptor()->num_requests());
 561 }
 562
 563 // Test that a DNS error occuring in the main frame does not result in an
 564 // additional session history entry.
 565 IN_PROC_BROWSER_TEST_F(ErrorPageTest, DNSError_GoBack2Forward2) {
 566   NavigateToFileURL(FILE_PATH_LITERAL("title3.html"));
 567
 568   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 569        browser(), GetDnsErrorURL(), 2);
 570   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 571   EXPECT_EQ(1, link_doctor_interceptor()->num_requests());
 572
 573   NavigateToFileURL(FILE_PATH_LITERAL("title2.html"));
 574
 575   GoBackAndWaitForNavigations(2);
 576   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 577   EXPECT_EQ(2, link_doctor_interceptor()->num_requests());
 578
 579   GoBackAndWaitForTitle("Title Of More Awesomeness", 1);
 580
 581   GoForwardAndWaitForNavigations(2);
 582   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 583   EXPECT_EQ(3, link_doctor_interceptor()->num_requests());
 584
 585   GoForwardAndWaitForTitle("Title Of Awesomeness", 1);
 586   EXPECT_EQ(3, link_doctor_interceptor()->num_requests());
 587 }
 588
 589 // Test that the search button on a DNS error page works.
 590 IN_PROC_BROWSER_TEST_F(ErrorPageTest, DNSError_DoSearch) {
 591   // The first navigation should fail, and the second one should be the error
 592   // page.
 593   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 594        browser(), GetDnsErrorURL(), 2);
 595   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 596   EXPECT_EQ(1, link_doctor_interceptor()->num_requests());
 597
 598   content::WebContents* web_contents =
 599       browser()->tab_strip_model()->GetActiveWebContents();
 600
 601   // Do a search and make sure the browser ends up at the right page.
 602   content::TestNavigationObserver nav_observer(web_contents, 1);
 603   content::TitleWatcher title_watcher(
 604       web_contents,
 605       base::ASCIIToUTF16("Title Of More Awesomeness"));
 606   // Can't use content::ExecuteScript because it waits for scripts to send
 607   // notification that they've run, and scripts that trigger a navigation may
 608   // not send that notification.
 609   web_contents->GetMainFrame()->ExecuteJavaScript(
 610       base::ASCIIToUTF16("document.getElementById('search-button').click();"));
 611   nav_observer.Wait();
 612   EXPECT_EQ(base::ASCIIToUTF16("Title Of More Awesomeness"),
 613             title_watcher.WaitAndGetTitle());
 614
 615   // There should have been another Link Doctor request, for tracking purposes.
 616   // Have to wait for it, since the search page does not depend on having
 617   // sent the tracking request.
 618   link_doctor_interceptor()->WaitForRequests(2);
 619   EXPECT_EQ(2, link_doctor_interceptor()->num_requests());
 620
 621   // Check the path and query string.
 622   std::string url;
 623   ASSERT_TRUE(content::ExecuteScriptAndExtractString(
 624                   browser()->tab_strip_model()->GetActiveWebContents(),
 625                   "domAutomationController.send(window.location.href);",
 626                   &url));
 627   EXPECT_EQ("/search", GURL(url).path());
 628   EXPECT_EQ("q=search%20query", GURL(url).query());
 629
 630   // Go back to the error page, to make sure the history is correct.
 631   GoBackAndWaitForNavigations(2);
 632   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 633   EXPECT_EQ(3, link_doctor_interceptor()->num_requests());
 634 }
 635
 636 // Test that the reload button on a DNS error page works.
 637 IN_PROC_BROWSER_TEST_F(ErrorPageTest, DNSError_DoReload) {
 638   // The first navigation should fail, and the second one should be the error
 639   // page.
 640   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 641        browser(), GetDnsErrorURL(), 2);
 642   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 643   EXPECT_EQ(1, link_doctor_interceptor()->num_requests());
 644
 645   content::WebContents* web_contents =
 646       browser()->tab_strip_model()->GetActiveWebContents();
 647
 648   // Clicking the reload button should load the error page again, and there
 649   // should be two commits, as before.
 650   content::TestNavigationObserver nav_observer(web_contents, 2);
 651   // Can't use content::ExecuteScript because it waits for scripts to send
 652   // notification that they've run, and scripts that trigger a navigation may
 653   // not send that notification.
 654   web_contents->GetMainFrame()->ExecuteJavaScript(
 655       base::ASCIIToUTF16("document.getElementById('reload-button').click();"));
 656   nav_observer.Wait();
 657   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 658
 659   // There should have two more requests to the correction service:  One for the
 660   // new error page, and one for tracking purposes.  Have to make sure to wait
 661   // for the tracking request, since the new error page does not depend on it.
 662   link_doctor_interceptor()->WaitForRequests(3);
 663   EXPECT_EQ(3, link_doctor_interceptor()->num_requests());
 664 }
 665
 666 // Test that clicking links on a DNS error page works.
 667 IN_PROC_BROWSER_TEST_F(ErrorPageTest, DNSError_DoClickLink) {
 668   // The first navigation should fail, and the second one should be the error
 669   // page.
 670   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 671        browser(), GetDnsErrorURL(), 2);
 672   ExpectDisplayingNavigationCorrections(browser(), net::ERR_NAME_NOT_RESOLVED);
 673   EXPECT_EQ(1, link_doctor_interceptor()->num_requests());
 674
 675   content::WebContents* web_contents =
 676       browser()->tab_strip_model()->GetActiveWebContents();
 677
 678   // Simulate a click on a link.
 679
 680   content::TitleWatcher title_watcher(
 681       web_contents,
 682       base::ASCIIToUTF16("Title Of Awesomeness"));
 683   std::string link_selector =
 684       "document.querySelector('a[href=\"http://mock.http/title2.html\"]')";
 685   // The tracking request is triggered by onmousedown, so it catches middle
 686   // mouse button clicks, as well as left clicks.
 687   web_contents->GetMainFrame()->ExecuteJavaScript(
 688       base::ASCIIToUTF16(link_selector + ".onmousedown();"));
 689   // Can't use content::ExecuteScript because it waits for scripts to send
 690   // notification that they've run, and scripts that trigger a navigation may
 691   // not send that notification.
 692   web_contents->GetMainFrame()->ExecuteJavaScript(
 693       base::ASCIIToUTF16(link_selector + ".click();"));
 694   EXPECT_EQ(base::ASCIIToUTF16("Title Of Awesomeness"),
 695             title_watcher.WaitAndGetTitle());
 696
 697   // There should have been a tracking request to the correction service.  Have
 698   // to make sure to wait the tracking request, since the new page does not
 699   // depend on it.
 700   link_doctor_interceptor()->WaitForRequests(2);
 701   EXPECT_EQ(2, link_doctor_interceptor()->num_requests());
 702 }
 703
 704 // Test that a DNS error occuring in an iframe does not result in showing
 705 // navigation corrections.
 706 IN_PROC_BROWSER_TEST_F(ErrorPageTest, IFrameDNSError_Basic) {
 707   NavigateToURLAndWaitForTitle(
 708       net::URLRequestMockHTTPJob::GetMockUrl(
 709           base::FilePath(FILE_PATH_LITERAL("iframe_dns_error.html"))),
 710       "Blah",
 711       1);
 712   // We expect to have two history entries, since we started off with navigation
 713   // to "about:blank" and then navigated to "iframe_dns_error.html".
 714   EXPECT_EQ(2,
 715       browser()->tab_strip_model()->GetActiveWebContents()->
 716           GetController().GetEntryCount());
 717   EXPECT_EQ(0, link_doctor_interceptor()->num_requests());
 718 }
 719
 720 // This test fails regularly on win_rel trybots. See crbug.com/121540
 721 #if defined(OS_WIN)
 722 #define MAYBE_IFrameDNSError_GoBack DISABLED_IFrameDNSError_GoBack
 723 #else
 724 #define MAYBE_IFrameDNSError_GoBack IFrameDNSError_GoBack
 725 #endif
 726 // Test that a DNS error occuring in an iframe does not result in an
 727 // additional session history entry.
 728 IN_PROC_BROWSER_TEST_F(ErrorPageTest, MAYBE_IFrameDNSError_GoBack) {
 729   NavigateToFileURL(FILE_PATH_LITERAL("title2.html"));
 730   NavigateToFileURL(FILE_PATH_LITERAL("iframe_dns_error.html"));
 731   GoBackAndWaitForTitle("Title Of Awesomeness", 1);
 732   EXPECT_EQ(0, link_doctor_interceptor()->num_requests());
 733 }
 734
 735 // This test fails regularly on win_rel trybots. See crbug.com/121540
 736 //
 737 // This fails on linux_aura bringup: http://crbug.com/163931
 738 #if defined(OS_WIN) || (defined(OS_LINUX) && !defined(OS_CHROMEOS) && defined(USE_AURA))
 739 #define MAYBE_IFrameDNSError_GoBackAndForward DISABLED_IFrameDNSError_GoBackAndForward
 740 #else
 741 #define MAYBE_IFrameDNSError_GoBackAndForward IFrameDNSError_GoBackAndForward
 742 #endif
 743 // Test that a DNS error occuring in an iframe does not result in an
 744 // additional session history entry.
 745 IN_PROC_BROWSER_TEST_F(ErrorPageTest, MAYBE_IFrameDNSError_GoBackAndForward) {
 746   NavigateToFileURL(FILE_PATH_LITERAL("title2.html"));
 747   NavigateToFileURL(FILE_PATH_LITERAL("iframe_dns_error.html"));
 748   GoBackAndWaitForTitle("Title Of Awesomeness", 1);
 749   GoForwardAndWaitForTitle("Blah", 1);
 750   EXPECT_EQ(0, link_doctor_interceptor()->num_requests());
 751 }
 752
 753 // Test that a DNS error occuring in an iframe, once the main document is
 754 // completed loading, does not result in an additional session history entry.
 755 // To ensure that the main document has completed loading, JavaScript is used to
 756 // inject an iframe after loading is done.
 757 IN_PROC_BROWSER_TEST_F(ErrorPageTest, IFrameDNSError_JavaScript) {
 758   content::WebContents* wc =
 759       browser()->tab_strip_model()->GetActiveWebContents();
 760   GURL fail_url =
 761       URLRequestFailedJob::GetMockHttpUrl(net::ERR_NAME_NOT_RESOLVED);
 762
 763   // Load a regular web page, in which we will inject an iframe.
 764   NavigateToFileURL(FILE_PATH_LITERAL("title2.html"));
 765
 766   // We expect to have two history entries, since we started off with navigation
 767   // to "about:blank" and then navigated to "title2.html".
 768   EXPECT_EQ(2, wc->GetController().GetEntryCount());
 769
 770   std::string script = "var frame = document.createElement('iframe');"
 771                        "frame.src = '" + fail_url.spec() + "';"
 772                        "document.body.appendChild(frame);";
 773   {
 774     TestFailProvisionalLoadObserver fail_observer(wc);
 775     content::WindowedNotificationObserver load_observer(
 776         content::NOTIFICATION_LOAD_STOP,
 777         content::Source<NavigationController>(&wc->GetController()));
 778     wc->GetMainFrame()->ExecuteJavaScript(base::ASCIIToUTF16(script));
 779     load_observer.Wait();
 780
 781     // Ensure we saw the expected failure.
 782     EXPECT_EQ(fail_url, fail_observer.fail_url());
 783
 784     // Failed initial navigation of an iframe shouldn't be adding any history
 785     // entries.
 786     EXPECT_EQ(2, wc->GetController().GetEntryCount());
 787   }
 788
 789   // Do the same test, but with an iframe that doesn't have initial URL
 790   // assigned.
 791   script = "var frame = document.createElement('iframe');"
 792            "frame.id = 'target_frame';"
 793            "document.body.appendChild(frame);";
 794   {
 795     content::WindowedNotificationObserver load_observer(
 796         content::NOTIFICATION_LOAD_STOP,
 797         content::Source<NavigationController>(&wc->GetController()));
 798     wc->GetMainFrame()->ExecuteJavaScript(base::ASCIIToUTF16(script));
 799     load_observer.Wait();
 800   }
 801
 802   script = "var f = document.getElementById('target_frame');"
 803            "f.src = '" + fail_url.spec() + "';";
 804   {
 805     TestFailProvisionalLoadObserver fail_observer(wc);
 806     content::WindowedNotificationObserver load_observer(
 807         content::NOTIFICATION_LOAD_STOP,
 808         content::Source<NavigationController>(&wc->GetController()));
 809     wc->GetMainFrame()->ExecuteJavaScript(base::ASCIIToUTF16(script));
 810     load_observer.Wait();
 811
 812     EXPECT_EQ(fail_url, fail_observer.fail_url());
 813     EXPECT_EQ(2, wc->GetController().GetEntryCount());
 814   }
 815   EXPECT_EQ(0, link_doctor_interceptor()->num_requests());
 816 }
 817
 818 // Checks that navigation corrections are not loaded when we receive an actual
 819 // 404 page.
 820 IN_PROC_BROWSER_TEST_F(ErrorPageTest, Page404) {
 821   NavigateToURLAndWaitForTitle(
 822       net::URLRequestMockHTTPJob::GetMockUrl(
 823           base::FilePath(FILE_PATH_LITERAL("page404.html"))),
 824       "SUCCESS",
 825       1);
 826   EXPECT_EQ(0, link_doctor_interceptor()->num_requests());
 827 }
 828
 829 // Checks that when an error occurs, the stale cache status of the page
 830 // is correctly transferred, and that stale cached copied can be loaded
 831 // from the javascript.
 832 IN_PROC_BROWSER_TEST_F(ErrorPageTest, StaleCacheStatus) {
 833   ASSERT_TRUE(test_server()->Start());
 834   // Load cache with entry with "nocache" set, to create stale
 835   // cache.
 836   GURL test_url(test_server()->GetURL("files/nocache.html"));
 837   NavigateToURLAndWaitForTitle(test_url, "Nocache Test Page", 1);
 838
 839   // Reload same URL after forcing an error from the the network layer;
 840   // confirm that the error page is told the cached copy exists.
 841   scoped_refptr<net::URLRequestContextGetter> url_request_context_getter =
 842       browser()->profile()->GetRequestContext();
 843   BrowserThread::PostTask(
 844       BrowserThread::IO, FROM_HERE,
 845       base::Bind(&InterceptNetworkTransactions, url_request_context_getter,
 846                  net::ERR_FAILED));
 847
 848   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 849       // With no navigation corrections to load, there's only one navigation.
 850       browser(), test_url, 1);
 851   EXPECT_TRUE(ProbeStaleCopyValue(true));
 852   EXPECT_TRUE(IsDisplayingText(browser(), GetLoadStaleButtonLabel()));
 853   EXPECT_NE(base::ASCIIToUTF16("Nocache Test Page"),
 854             browser()->tab_strip_model()->GetActiveWebContents()->GetTitle());
 855
 856   // Confirm that loading the stale copy from the cache works.
 857   content::TestNavigationObserver same_tab_observer(
 858       browser()->tab_strip_model()->GetActiveWebContents(), 1);
 859   ASSERT_TRUE(ReloadStaleCopyFromCache());
 860   same_tab_observer.Wait();
 861   EXPECT_EQ(base::ASCIIToUTF16("Nocache Test Page"),
 862             browser()->tab_strip_model()->GetActiveWebContents()->GetTitle());
 863
 864   // Clear the cache and reload the same URL; confirm the error page is told
 865   // that there is no cached copy.
 866   BrowsingDataRemover* remover =
 867       BrowsingDataRemover::CreateForUnboundedRange(browser()->profile());
 868   remover->Remove(BrowsingDataRemover::REMOVE_CACHE,
 869                   BrowsingDataHelper::UNPROTECTED_WEB);
 870   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 871       browser(), test_url, 1);
 872   EXPECT_TRUE(ProbeStaleCopyValue(false));
 873   EXPECT_FALSE(IsDisplayingText(browser(), GetLoadStaleButtonLabel()));
 874   EXPECT_EQ(0, link_doctor_interceptor()->num_requests());
 875 }
 876
 877 class ErrorPageAutoReloadTest : public InProcessBrowserTest {
 878  public:
 879   void SetUpCommandLine(CommandLine* command_line) override {
 880     command_line->AppendSwitch(switches::kEnableOfflineAutoReload);
 881   }
 882
 883   void InstallInterceptor(const GURL& url, int requests_to_fail) {
 884     interceptor_ = new FailFirstNRequestsInterceptor(requests_to_fail);
 885     scoped_ptr<net::URLRequestInterceptor> owned_interceptor(interceptor_);
 886
 887     // Tests don't need to wait for this task to complete before using the
 888     // filter; any requests that might be affected by it will end up in the IO
 889     // thread's message loop after this posted task anyway.
 890     //
 891     // Ownership of the interceptor is passed to an object the IO thread, but a
 892     // pointer is kept in the test fixture.  As soon as anything calls
 893     // URLRequestFilter::ClearHandlers(), |interceptor_| can become invalid.
 894     BrowserThread::PostTask(
 895         BrowserThread::IO, FROM_HERE,
 896         base::Bind(&AddInterceptorForURL, url,
 897                    base::Passed(&owned_interceptor)));
 898   }
 899
 900   void NavigateToURLAndWaitForTitle(const GURL& url,
 901                                     const std::string& expected_title,
 902                                     int num_navigations) {
 903     content::TitleWatcher title_watcher(
 904         browser()->tab_strip_model()->GetActiveWebContents(),
 905         base::ASCIIToUTF16(expected_title));
 906
 907     ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 908         browser(), url, num_navigations);
 909
 910     EXPECT_EQ(base::ASCIIToUTF16(expected_title),
 911               title_watcher.WaitAndGetTitle());
 912   }
 913
 914   FailFirstNRequestsInterceptor* interceptor() {
 915     return interceptor_;
 916   }
 917
 918  private:
 919   FailFirstNRequestsInterceptor* interceptor_;
 920 };
 921
 922 IN_PROC_BROWSER_TEST_F(ErrorPageAutoReloadTest, AutoReload) {
 923   GURL test_url("http://error.page.auto.reload");
 924   const int kRequestsToFail = 2;
 925   InstallInterceptor(test_url, kRequestsToFail);
 926   NavigateToURLAndWaitForTitle(test_url, "Test One", kRequestsToFail + 1);
 927   // Note that the interceptor updates these variables on the IO thread,
 928   // but this function reads them on the main thread. The requests have to be
 929   // created (on the IO thread) before NavigateToURLAndWaitForTitle returns or
 930   // this becomes racey.
 931   EXPECT_EQ(kRequestsToFail, interceptor()->failures());
 932   EXPECT_EQ(kRequestsToFail + 1, interceptor()->requests());
 933 }
 934
 935 // Interceptor that fails all requests with net::ERR_ADDRESS_UNREACHABLE.
 936 class AddressUnreachableInterceptor : public net::URLRequestInterceptor {
 937  public:
 938   AddressUnreachableInterceptor() {}
 939   ~AddressUnreachableInterceptor() override {}
 940
 941   // net::URLRequestInterceptor:
 942   net::URLRequestJob* MaybeInterceptRequest(
 943       net::URLRequest* request,
 944       net::NetworkDelegate* network_delegate) const override {
 945     return new URLRequestFailedJob(request,
 946                                    network_delegate,
 947                                    net::ERR_ADDRESS_UNREACHABLE);
 948   }
 949
 950  private:
 951   DISALLOW_COPY_AND_ASSIGN(AddressUnreachableInterceptor);
 952 };
 953
 954 // A test fixture that returns ERR_ADDRESS_UNREACHABLE for all navigation
 955 // correction requests.  ERR_NAME_NOT_RESOLVED is more typical, but need to use
 956 // a different error for the correction service and the original page to
 957 // validate the right page is being displayed.
 958 class ErrorPageNavigationCorrectionsFailTest : public ErrorPageTest {
 959  public:
 960   // InProcessBrowserTest:
 961   void SetUpOnMainThread() override {
 962     BrowserThread::PostTask(
 963         BrowserThread::IO, FROM_HERE,
 964         base::Bind(&ErrorPageNavigationCorrectionsFailTest::AddFilters));
 965   }
 966
 967   void TearDownOnMainThread() override {
 968     BrowserThread::PostTask(
 969         BrowserThread::IO, FROM_HERE,
 970         base::Bind(&ErrorPageNavigationCorrectionsFailTest::RemoveFilters));
 971   }
 972
 973  private:
 974   // Adds a filter that causes all correction service requests to fail with
 975   // ERR_ADDRESS_UNREACHABLE.
 976   //
 977   // Also adds the net::URLRequestFailedJob filter.
 978   static void AddFilters() {
 979     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 980     URLRequestFailedJob::AddUrlHandler();
 981
 982     net::URLRequestFilter::GetInstance()->AddUrlInterceptor(
 983         google_util::LinkDoctorBaseURL(),
 984         scoped_ptr<net::URLRequestInterceptor>(
 985             new AddressUnreachableInterceptor()));
 986   }
 987
 988   static void RemoveFilters() {
 989     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 990     net::URLRequestFilter::GetInstance()->ClearHandlers();
 991   }
 992 };
 993
 994 // Make sure that when corrections fail to load, the network error page is
 995 // successfully loaded.
 996 IN_PROC_BROWSER_TEST_F(ErrorPageNavigationCorrectionsFailTest,
 997                        FetchCorrectionsFails) {
 998   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
 999       browser(),
1000       URLRequestFailedJob::GetMockHttpUrl(net::ERR_NAME_NOT_RESOLVED),
1001       2);
1002
1003   // Verify that the expected error page is being displayed.
1004   ExpectDisplayingLocalErrorPage(browser(), net::ERR_NAME_NOT_RESOLVED);
1005 }
1006
1007 // Checks that when an error occurs and a corrections fail to load, the stale
1008 // cache status of the page is correctly transferred, and we can load the
1009 // stale copy from the javascript.  Most logic copied from StaleCacheStatus
1010 // above.
1011 IN_PROC_BROWSER_TEST_F(ErrorPageNavigationCorrectionsFailTest,
1012                        StaleCacheStatusFailedCorrections) {
1013   ASSERT_TRUE(test_server()->Start());
1014   // Load cache with entry with "nocache" set, to create stale
1015   // cache.
1016   GURL test_url(test_server()->GetURL("files/nocache.html"));
1017   NavigateToURLAndWaitForTitle(test_url, "Nocache Test Page", 1);
1018
1019   // Reload same URL after forcing an error from the the network layer;
1020   // confirm that the error page is told the cached copy exists.
1021   scoped_refptr<net::URLRequestContextGetter> url_request_context_getter =
1022       browser()->profile()->GetRequestContext();
1023   BrowserThread::PostTask(
1024       BrowserThread::IO, FROM_HERE,
1025       base::Bind(&InterceptNetworkTransactions, url_request_context_getter,
1026                  net::ERR_CONNECTION_FAILED));
1027
1028   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
1029       browser(), test_url, 2);
1030   EXPECT_TRUE(IsDisplayingText(browser(), GetLoadStaleButtonLabel()));
1031   EXPECT_TRUE(ProbeStaleCopyValue(true));
1032
1033   // Confirm that loading the stale copy from the cache works.
1034   content::TestNavigationObserver same_tab_observer(
1035       browser()->tab_strip_model()->GetActiveWebContents(), 1);
1036   ASSERT_TRUE(ReloadStaleCopyFromCache());
1037   same_tab_observer.Wait();
1038   EXPECT_EQ(base::ASCIIToUTF16("Nocache Test Page"),
1039             browser()->tab_strip_model()->GetActiveWebContents()->GetTitle());
1040
1041   // Clear the cache and reload the same URL; confirm the error page is told
1042   // that there is no cached copy.
1043   BrowsingDataRemover* remover =
1044       BrowsingDataRemover::CreateForUnboundedRange(browser()->profile());
1045   remover->Remove(BrowsingDataRemover::REMOVE_CACHE,
1046                   BrowsingDataHelper::UNPROTECTED_WEB);
1047   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
1048       browser(), test_url, 2);
1049   EXPECT_TRUE(ProbeStaleCopyValue(false));
1050   EXPECT_FALSE(IsDisplayingText(browser(), GetLoadStaleButtonLabel()));
1051 }
1052
1053 // A test fixture that simulates failing requests for an IDN domain name.
1054 class ErrorPageForIDNTest : public InProcessBrowserTest {
1055  public:
1056   // Target hostname in different forms.
1057   static const char kHostname[];
1058   static const char kHostnameJSUnicode[];
1059
1060   // InProcessBrowserTest:
1061   void SetUpOnMainThread() override {
1062     // Clear AcceptLanguages to force punycode decoding.
1063     browser()->profile()->GetPrefs()->SetString(prefs::kAcceptLanguages,
1064                                                 std::string());
1065     BrowserThread::PostTask(
1066         BrowserThread::IO, FROM_HERE,
1067         base::Bind(&ErrorPageForIDNTest::AddFilters));
1068   }
1069
1070   void TearDownOnMainThread() override {
1071     BrowserThread::PostTask(
1072         BrowserThread::IO, FROM_HERE,
1073         base::Bind(&ErrorPageForIDNTest::RemoveFilters));
1074   }
1075
1076  private:
1077   static void AddFilters() {
1078     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
1079     URLRequestFailedJob::AddUrlHandlerForHostname(kHostname);
1080   }
1081
1082   static void RemoveFilters() {
1083     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
1084     net::URLRequestFilter::GetInstance()->ClearHandlers();
1085   }
1086 };
1087
1088 const char ErrorPageForIDNTest::kHostname[] =
1089     "xn--d1abbgf6aiiy.xn--p1ai";
1090 const char ErrorPageForIDNTest::kHostnameJSUnicode[] =
1091     "\\u043f\\u0440\\u0435\\u0437\\u0438\\u0434\\u0435\\u043d\\u0442."
1092     "\\u0440\\u0444";
1093
1094 // Make sure error page shows correct unicode for IDN.
1095 IN_PROC_BROWSER_TEST_F(ErrorPageForIDNTest, IDN) {
1096   // ERR_UNSAFE_PORT will not trigger navigation corrections.
1097   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(
1098       browser(),
1099       URLRequestFailedJob::GetMockHttpUrlForHostname(net::ERR_UNSAFE_PORT,
1100                                                      kHostname),
1101       1);
1102
1103   ToggleHelpBox(browser());
1104   EXPECT_TRUE(IsDisplayingText(browser(), kHostnameJSUnicode));
1105 }
1106
1107 }  // namespace