content/browser/frame_host/navigation_controller_impl_unittest.cc

// Copyright 2013 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/basictypes.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/memory/scoped_ptr.h"
#include "base/stl_util.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "content/browser/frame_host/cross_site_transferring_request.h"
#include "content/browser/frame_host/navigation_controller_impl.h"
#include "content/browser/frame_host/navigation_entry_impl.h"
#include "content/browser/frame_host/navigation_entry_screenshot_manager.h"
#include "content/browser/frame_host/navigation_request.h"
#include "content/browser/frame_host/navigator.h"
#include "content/browser/frame_host/navigator_impl.h"
#include "content/browser/site_instance_impl.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/common/frame_messages.h"
#include "content/common/view_messages.h"
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents_delegate.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/page_state.h"
#include "content/public/common/page_type.h"
#include "content/public/common/url_constants.h"
#include "content/public/test/mock_render_process_host.h"
#include "content/public/test/test_notification_tracker.h"
#include "content/public/test/test_utils.h"
#include "content/test/test_render_frame_host.h"
#include "content/test/test_render_view_host.h"
#include "content/test/test_web_contents.h"
#include "net/base/net_util.h"
#include "skia/ext/platform_canvas.h"
#include "testing/gtest/include/gtest/gtest.h"

using base::Time;

namespace {

// Creates an image with a 1x1 SkBitmap of the specified |color|.
gfx::Image CreateImage(SkColor color) {
  SkBitmap bitmap;
  bitmap.allocN32Pixels(1, 1);
  bitmap.eraseColor(color);
  return gfx::Image::CreateFrom1xBitmap(bitmap);
}

// Returns true if images |a| and |b| have the same pixel data.
bool DoImagesMatch(const gfx::Image& a, const gfx::Image& b) {
  // Assume that if the 1x bitmaps match, the images match.
  SkBitmap a_bitmap = a.AsBitmap();
  SkBitmap b_bitmap = b.AsBitmap();

  if (a_bitmap.width() != b_bitmap.width() ||
      a_bitmap.height() != b_bitmap.height()) {
    return false;
  }
  SkAutoLockPixels a_bitmap_lock(a_bitmap);
  SkAutoLockPixels b_bitmap_lock(b_bitmap);
  return memcmp(a_bitmap.getPixels(),
                b_bitmap.getPixels(),
                a_bitmap.getSize()) == 0;
}

class MockScreenshotManager : public content::NavigationEntryScreenshotManager {
 public:
  explicit MockScreenshotManager(content::NavigationControllerImpl* owner)
      : content::NavigationEntryScreenshotManager(owner),
        encoding_screenshot_in_progress_(false) {
  }

  ~MockScreenshotManager() override {}

  void TakeScreenshotFor(content::NavigationEntryImpl* entry) {
    SkBitmap bitmap;
    bitmap.allocPixels(SkImageInfo::Make(
        1, 1, kAlpha_8_SkColorType, kPremul_SkAlphaType));
    bitmap.eraseARGB(0, 0, 0, 0);
    encoding_screenshot_in_progress_ = true;
    OnScreenshotTaken(entry->GetUniqueID(), bitmap, content::READBACK_SUCCESS);
    WaitUntilScreenshotIsReady();
  }

  int GetScreenshotCount() {
    return content::NavigationEntryScreenshotManager::GetScreenshotCount();
  }

  void WaitUntilScreenshotIsReady() {
    if (!encoding_screenshot_in_progress_)
      return;
    message_loop_runner_ = new content::MessageLoopRunner;
    message_loop_runner_->Run();
  }

 private:
  // Overridden from content::NavigationEntryScreenshotManager:
  void TakeScreenshotImpl(content::RenderViewHost* host,
                          content::NavigationEntryImpl* entry) override {}

  void OnScreenshotSet(content::NavigationEntryImpl* entry) override {
    encoding_screenshot_in_progress_ = false;
    NavigationEntryScreenshotManager::OnScreenshotSet(entry);
    if (message_loop_runner_.get())
      message_loop_runner_->Quit();
  }

  scoped_refptr<content::MessageLoopRunner> message_loop_runner_;
  bool encoding_screenshot_in_progress_;

  DISALLOW_COPY_AND_ASSIGN(MockScreenshotManager);
};

}  // namespace

namespace content {

// TimeSmoother tests ----------------------------------------------------------

// With no duplicates, GetSmoothedTime should be the identity
// function.
TEST(TimeSmoother, Basic) {
  NavigationControllerImpl::TimeSmoother smoother;
  for (int64 i = 1; i < 1000; ++i) {
    base::Time t = base::Time::FromInternalValue(i);
    EXPECT_EQ(t, smoother.GetSmoothedTime(t));
  }
}

// With a single duplicate and timestamps thereafter increasing by one
// microsecond, the smoothed time should always be one behind.
TEST(TimeSmoother, SingleDuplicate) {
  NavigationControllerImpl::TimeSmoother smoother;
  base::Time t = base::Time::FromInternalValue(1);
  EXPECT_EQ(t, smoother.GetSmoothedTime(t));
  for (int64 i = 1; i < 1000; ++i) {
    base::Time expected_t = base::Time::FromInternalValue(i + 1);
    t = base::Time::FromInternalValue(i);
    EXPECT_EQ(expected_t, smoother.GetSmoothedTime(t));
  }
}

// With k duplicates and timestamps thereafter increasing by one
// microsecond, the smoothed time should always be k behind.
TEST(TimeSmoother, ManyDuplicates) {
  const int64 kNumDuplicates = 100;
  NavigationControllerImpl::TimeSmoother smoother;
  base::Time t = base::Time::FromInternalValue(1);
  for (int64 i = 0; i < kNumDuplicates; ++i) {
    base::Time expected_t = base::Time::FromInternalValue(i + 1);
    EXPECT_EQ(expected_t, smoother.GetSmoothedTime(t));
  }
  for (int64 i = 1; i < 1000; ++i) {
    base::Time expected_t =
        base::Time::FromInternalValue(i + kNumDuplicates);
    t = base::Time::FromInternalValue(i);
    EXPECT_EQ(expected_t, smoother.GetSmoothedTime(t));
  }
}

// If the clock jumps far back enough after a run of duplicates, it
// should immediately jump to that value.
TEST(TimeSmoother, ClockBackwardsJump) {
  const int64 kNumDuplicates = 100;
  NavigationControllerImpl::TimeSmoother smoother;
  base::Time t = base::Time::FromInternalValue(1000);
  for (int64 i = 0; i < kNumDuplicates; ++i) {
    base::Time expected_t = base::Time::FromInternalValue(i + 1000);
    EXPECT_EQ(expected_t, smoother.GetSmoothedTime(t));
  }
  t = base::Time::FromInternalValue(500);
  EXPECT_EQ(t, smoother.GetSmoothedTime(t));
}

// NavigationControllerTest ----------------------------------------------------

class NavigationControllerTest
    : public RenderViewHostImplTestHarness,
      public WebContentsObserver {
 public:
  NavigationControllerTest() : navigation_entry_committed_counter_(0) {
  }

  void SetUp() override {
    RenderViewHostImplTestHarness::SetUp();
    WebContents* web_contents = RenderViewHostImplTestHarness::web_contents();
    ASSERT_TRUE(web_contents);  // The WebContents should be created by now.
    WebContentsObserver::Observe(web_contents);
  }

  // WebContentsObserver:
  void DidStartNavigationToPendingEntry(
      const GURL& url,
      NavigationController::ReloadType reload_type) override {
    navigated_url_ = url;
  }

  void NavigationEntryCommitted(
      const LoadCommittedDetails& load_details) override {
    navigation_entry_committed_counter_++;
  }

  const GURL& navigated_url() const {
    return navigated_url_;
  }

  NavigationControllerImpl& controller_impl() {
    return static_cast<NavigationControllerImpl&>(controller());
  }

  bool HasNavigationRequest() {
    if (base::CommandLine::ForCurrentProcess()->HasSwitch(
            switches::kEnableBrowserSideNavigation)) {
      FrameTreeNode* root = contents()->GetFrameTree()->root();
      NavigationRequest* navigation_request = static_cast<NavigatorImpl*>(
          root->navigator())->GetNavigationRequestForNodeForTesting(root);
      return navigation_request != nullptr;
    }
    return process()->sink().GetFirstMessageMatching(FrameMsg_Navigate::ID)
        != nullptr;
  }

  const GURL GetLastNavigationURL() {
    if (base::CommandLine::ForCurrentProcess()->HasSwitch(
            switches::kEnableBrowserSideNavigation)) {
      FrameTreeNode* root = contents()->GetFrameTree()->root();
      NavigationRequest* navigation_request = static_cast<NavigatorImpl*>(
          root->navigator())->GetNavigationRequestForNodeForTesting(root);
      CHECK(navigation_request);
      return navigation_request->common_params().url;
    }
    const IPC::Message* message =
      process()->sink().GetFirstMessageMatching(FrameMsg_Navigate::ID);
    CHECK(message);
    Tuple<FrameMsg_Navigate_Params> nav_params;
    FrameMsg_Navigate::Read(message, &nav_params);
    return get<0>(nav_params).common_params.url;
  }

 protected:
  GURL navigated_url_;
  size_t navigation_entry_committed_counter_;
};

void RegisterForAllNavNotifications(TestNotificationTracker* tracker,
                                    NavigationController* controller) {
  tracker->ListenFor(NOTIFICATION_NAV_LIST_PRUNED,
                     Source<NavigationController>(controller));
  tracker->ListenFor(NOTIFICATION_NAV_ENTRY_CHANGED,
                     Source<NavigationController>(controller));
}

SiteInstance* GetSiteInstanceFromEntry(NavigationEntry* entry) {
  return NavigationEntryImpl::FromNavigationEntry(entry)->site_instance();
}

class TestWebContentsDelegate : public WebContentsDelegate {
 public:
  explicit TestWebContentsDelegate() :
      navigation_state_change_count_(0),
      repost_form_warning_count_(0) {}

  int navigation_state_change_count() {
    return navigation_state_change_count_;
  }

  int repost_form_warning_count() {
    return repost_form_warning_count_;
  }

  // Keep track of whether the tab has notified us of a navigation state change.
  void NavigationStateChanged(WebContents* source,
                              InvalidateTypes changed_flags) override {
    navigation_state_change_count_++;
  }

  void ShowRepostFormWarningDialog(WebContents* source) override {
    repost_form_warning_count_++;
  }

 private:
  // The number of times NavigationStateChanged has been called.
  int navigation_state_change_count_;

  // The number of times ShowRepostFormWarningDialog() was called.
  int repost_form_warning_count_;
};

// -----------------------------------------------------------------------------

TEST_F(NavigationControllerTest, Defaults) {
  NavigationControllerImpl& controller = controller_impl();

  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.GetVisibleEntry());
  EXPECT_FALSE(controller.GetLastCommittedEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), -1);
  EXPECT_EQ(controller.GetEntryCount(), 0);
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

TEST_F(NavigationControllerTest, GoToOffset) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const int kNumUrls = 5;
  std::vector<GURL> urls(kNumUrls);
  for (int i = 0; i < kNumUrls; ++i) {
    urls[i] = GURL(base::StringPrintf("http://www.a.com/%d", i));
  }

  main_test_rfh()->PrepareForCommit(urls[0]);
  main_test_rfh()->SendNavigate(0, urls[0]);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(urls[0], controller.GetVisibleEntry()->GetVirtualURL());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_FALSE(controller.CanGoToOffset(1));

  for (int i = 1; i <= 4; ++i) {
    main_test_rfh()->PrepareForCommit(urls[i]);
    main_test_rfh()->SendNavigate(i, urls[i]);
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
    EXPECT_EQ(urls[i], controller.GetVisibleEntry()->GetVirtualURL());
    EXPECT_TRUE(controller.CanGoToOffset(-i));
    EXPECT_FALSE(controller.CanGoToOffset(-(i + 1)));
    EXPECT_FALSE(controller.CanGoToOffset(1));
  }

  // We have loaded 5 pages, and are currently at the last-loaded page.
  int url_index = 4;

  enum Tests {
    GO_TO_MIDDLE_PAGE = -2,
    GO_FORWARDS = 1,
    GO_BACKWARDS = -1,
    GO_TO_BEGINNING = -2,
    GO_TO_END = 4,
    NUM_TESTS = 5,
  };

  const int test_offsets[NUM_TESTS] = {
    GO_TO_MIDDLE_PAGE,
    GO_FORWARDS,
    GO_BACKWARDS,
    GO_TO_BEGINNING,
    GO_TO_END
  };

  for (int test = 0; test < NUM_TESTS; ++test) {
    int offset = test_offsets[test];
    controller.GoToOffset(offset);
    url_index += offset;
    // Check that the GoToOffset will land on the expected page.
    EXPECT_EQ(urls[url_index], controller.GetPendingEntry()->GetVirtualURL());
    main_test_rfh()->PrepareForCommit(urls[url_index]);
    main_test_rfh()->SendNavigate(url_index, urls[url_index]);
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
    // Check that we can go to any valid offset into the history.
    for (size_t j = 0; j < urls.size(); ++j)
      EXPECT_TRUE(controller.CanGoToOffset(j - url_index));
    // Check that we can't go beyond the beginning or end of the history.
    EXPECT_FALSE(controller.CanGoToOffset(-(url_index + 1)));
    EXPECT_FALSE(controller.CanGoToOffset(urls.size() - url_index));
  }
}

TEST_F(NavigationControllerTest, LoadURL) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  // Creating a pending notification should not have issued any of the
  // notifications we're listening for.
  EXPECT_EQ(0U, notifications.size());

  // The load should now be pending.
  EXPECT_EQ(controller.GetEntryCount(), 0);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), -1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_FALSE(controller.GetLastCommittedEntry());
  ASSERT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(controller.GetPendingEntry(), controller.GetVisibleEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_EQ(contents()->GetMaxPageID(), -1);

  // Neither the timestamp nor the status code should have been set yet.
  EXPECT_TRUE(controller.GetPendingEntry()->GetTimestamp().is_null());
  EXPECT_EQ(0, controller.GetPendingEntry()->GetHttpStatusCode());

  // We should have gotten no notifications from the preceeding checks.
  EXPECT_EQ(0U, notifications.size());

  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The load should now be committed.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  ASSERT_TRUE(controller.GetVisibleEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_EQ(contents()->GetMaxPageID(), 0);
  EXPECT_EQ(0, NavigationEntryImpl::FromNavigationEntry(
      controller.GetLastCommittedEntry())->bindings());

  // The timestamp should have been set.
  EXPECT_FALSE(controller.GetVisibleEntry()->GetTimestamp().is_null());

  // Load another...
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  // The load should now be pending.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  ASSERT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(controller.GetPendingEntry(), controller.GetVisibleEntry());
  // TODO(darin): maybe this should really be true?
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_EQ(contents()->GetMaxPageID(), 0);

  EXPECT_TRUE(controller.GetPendingEntry()->GetTimestamp().is_null());

  // Simulate the beforeunload ack for the cross-site transition, and then the
  // commit.
  main_test_rfh()->PrepareForCommit(url2);
  contents()->GetPendingMainFrame()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The load should now be committed.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  ASSERT_TRUE(controller.GetVisibleEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_EQ(contents()->GetMaxPageID(), 1);

  EXPECT_FALSE(controller.GetVisibleEntry()->GetTimestamp().is_null());
}

namespace {

base::Time GetFixedTime(base::Time time) {
  return time;
}

}  // namespace

TEST_F(NavigationControllerTest, LoadURLSameTime) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Set the clock to always return a timestamp of 1.
  controller.SetGetTimestampCallbackForTest(
      base::Bind(&GetFixedTime, base::Time::FromInternalValue(1)));

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Load another...
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  // Simulate the beforeunload ack for the cross-site transition, and then the
  // commit.
  main_test_rfh()->PrepareForCommit(url2);
  contents()->GetPendingMainFrame()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The two loads should now be committed.
  ASSERT_EQ(controller.GetEntryCount(), 2);

  // Timestamps should be distinct despite the clock returning the
  // same value.
  EXPECT_EQ(1u,
            controller.GetEntryAtIndex(0)->GetTimestamp().ToInternalValue());
  EXPECT_EQ(2u,
            controller.GetEntryAtIndex(1)->GetTimestamp().ToInternalValue());
}

void CheckNavigationEntryMatchLoadParams(
    NavigationController::LoadURLParams& load_params,
    NavigationEntryImpl* entry) {
  EXPECT_EQ(load_params.url, entry->GetURL());
  EXPECT_EQ(load_params.referrer.url, entry->GetReferrer().url);
  EXPECT_EQ(load_params.referrer.policy, entry->GetReferrer().policy);
  EXPECT_EQ(load_params.transition_type, entry->GetTransitionType());
  EXPECT_EQ(load_params.extra_headers, entry->extra_headers());

  EXPECT_EQ(load_params.is_renderer_initiated, entry->is_renderer_initiated());
  EXPECT_EQ(load_params.base_url_for_data_url, entry->GetBaseURLForDataURL());
  if (!load_params.virtual_url_for_data_url.is_empty()) {
    EXPECT_EQ(load_params.virtual_url_for_data_url, entry->GetVirtualURL());
  }
  if (NavigationController::UA_OVERRIDE_INHERIT !=
      load_params.override_user_agent) {
    bool should_override = (NavigationController::UA_OVERRIDE_TRUE ==
        load_params.override_user_agent);
    EXPECT_EQ(should_override, entry->GetIsOverridingUserAgent());
  }
  EXPECT_EQ(load_params.browser_initiated_post_data.get(),
            entry->GetBrowserInitiatedPostData());
  EXPECT_EQ(load_params.transferred_global_request_id,
      entry->transferred_global_request_id());
}

TEST_F(NavigationControllerTest, LoadURLWithParams) {
  NavigationControllerImpl& controller = controller_impl();

  NavigationController::LoadURLParams load_params(GURL("http://foo"));
  load_params.referrer =
      Referrer(GURL("http://referrer"), blink::WebReferrerPolicyDefault);
  load_params.transition_type = ui::PAGE_TRANSITION_GENERATED;
  load_params.extra_headers = "content-type: text/plain";
  load_params.load_type = NavigationController::LOAD_TYPE_DEFAULT;
  load_params.is_renderer_initiated = true;
  load_params.override_user_agent = NavigationController::UA_OVERRIDE_TRUE;
  load_params.transferred_global_request_id = GlobalRequestID(2, 3);

  controller.LoadURLWithParams(load_params);
  NavigationEntryImpl* entry =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetPendingEntry());

  // The timestamp should not have been set yet.
  ASSERT_TRUE(entry);
  EXPECT_TRUE(entry->GetTimestamp().is_null());

  CheckNavigationEntryMatchLoadParams(load_params, entry);
}

TEST_F(NavigationControllerTest, LoadURLWithExtraParams_Data) {
  NavigationControllerImpl& controller = controller_impl();

  NavigationController::LoadURLParams load_params(
      GURL("data:text/html,dataurl"));
  load_params.load_type = NavigationController::LOAD_TYPE_DATA;
  load_params.base_url_for_data_url = GURL("http://foo");
  load_params.virtual_url_for_data_url = GURL(url::kAboutBlankURL);
  load_params.override_user_agent = NavigationController::UA_OVERRIDE_FALSE;

  controller.LoadURLWithParams(load_params);
  NavigationEntryImpl* entry =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetPendingEntry());

  CheckNavigationEntryMatchLoadParams(load_params, entry);
}

TEST_F(NavigationControllerTest, LoadURLWithExtraParams_HttpPost) {
  NavigationControllerImpl& controller = controller_impl();

  NavigationController::LoadURLParams load_params(GURL("https://posturl"));
  load_params.transition_type = ui::PAGE_TRANSITION_TYPED;
  load_params.load_type =
      NavigationController::LOAD_TYPE_BROWSER_INITIATED_HTTP_POST;
  load_params.override_user_agent = NavigationController::UA_OVERRIDE_TRUE;


  const unsigned char* raw_data =
      reinterpret_cast<const unsigned char*>("d\n\0a2");
  const int length = 5;
  std::vector<unsigned char> post_data_vector(raw_data, raw_data+length);
  scoped_refptr<base::RefCountedBytes> data =
      base::RefCountedBytes::TakeVector(&post_data_vector);
  load_params.browser_initiated_post_data = data.get();

  controller.LoadURLWithParams(load_params);
  NavigationEntryImpl* entry =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetPendingEntry());

  CheckNavigationEntryMatchLoadParams(load_params, entry);
}

// Tests what happens when the same page is loaded again.  Should not create a
// new session history entry. This is what happens when you press enter in the
// URL bar to reload: a pending entry is created and then it is discarded when
// the load commits (because WebCore didn't actually make a new entry).
TEST_F(NavigationControllerTest, LoadURL_SamePage) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  ASSERT_TRUE(controller.GetVisibleEntry());
  const base::Time timestamp = controller.GetVisibleEntry()->GetTimestamp();
  EXPECT_FALSE(timestamp.is_null());

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // We should not have produced a new session history entry.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  ASSERT_TRUE(controller.GetVisibleEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());

  // The timestamp should have been updated.
  //
  // TODO(akalin): Change this EXPECT_GE (and other similar ones) to
  // EXPECT_GT once we guarantee that timestamps are unique.
  EXPECT_GE(controller.GetVisibleEntry()->GetTimestamp(), timestamp);
}

// Load the same page twice, once as a GET and once as a POST.
// We should update the post state on the NavigationEntry.
TEST_F(NavigationControllerTest, LoadURL_SamePage_DifferentMethod) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url1;
  params.transition = ui::PAGE_TRANSITION_TYPED;
  params.is_post = true;
  params.post_id = 123;
  params.page_state = PageState::CreateForTesting(url1, false, 0, 0);
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigateWithParams(&params);

  // The post data should be visible.
  NavigationEntry* entry = controller.GetVisibleEntry();
  ASSERT_TRUE(entry);
  EXPECT_TRUE(entry->GetHasPostData());
  EXPECT_EQ(entry->GetPostID(), 123);

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);

  // We should not have produced a new session history entry.
  ASSERT_EQ(controller.GetVisibleEntry(), entry);

  // The post data should have been cleared due to the GET.
  EXPECT_FALSE(entry->GetHasPostData());
  EXPECT_EQ(entry->GetPostID(), 0);
}

// Tests loading a URL but discarding it before the load commits.
TEST_F(NavigationControllerTest, LoadURL_Discarded) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  ASSERT_TRUE(controller.GetVisibleEntry());
  const base::Time timestamp = controller.GetVisibleEntry()->GetTimestamp();
  EXPECT_FALSE(timestamp.is_null());

  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  controller.DiscardNonCommittedEntries();
  EXPECT_EQ(0U, notifications.size());

  // Should not have produced a new session history entry.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  ASSERT_TRUE(controller.GetVisibleEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());

  // Timestamp should not have changed.
  EXPECT_EQ(timestamp, controller.GetVisibleEntry()->GetTimestamp());
}

// Tests navigations that come in unrequested. This happens when the user
// navigates from the web page, and here we test that there is no pending entry.
TEST_F(NavigationControllerTest, LoadURL_NoPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // First make an existing committed entry.
  const GURL kExistingURL1("http://eh");
  controller.LoadURL(
      kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, kExistingURL1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Do a new navigation without making a pending one.
  const GURL kNewURL("http://see");
  main_test_rfh()->SendNavigate(99, kNewURL);

  // There should no longer be any pending entry, and the third navigation we
  // just made should be committed.
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(kNewURL, controller.GetVisibleEntry()->GetURL());
}

// Tests navigating to a new URL when there is a new pending navigation that is
// not the one that just loaded. This will happen if the user types in a URL to
// somewhere slow, and then navigates the current page before the typed URL
// commits.
TEST_F(NavigationControllerTest, LoadURL_NewPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // First make an existing committed entry.
  const GURL kExistingURL1("http://eh");
  controller.LoadURL(
      kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(kExistingURL1);
  main_test_rfh()->SendNavigate(0, kExistingURL1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Make a pending entry to somewhere new.
  const GURL kExistingURL2("http://bee");
  controller.LoadURL(
      kExistingURL2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());

  // After the beforeunload but before it commits, do a new navigation.
  main_test_rfh()->PrepareForCommit(kExistingURL2);
  const GURL kNewURL("http://see");
  main_test_rfh()->PrepareForCommit(kNewURL);
  contents()->GetMainFrame()->SendNavigate(3, kNewURL);

  // There should no longer be any pending entry, and the third navigation we
  // just made should be committed.
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(kNewURL, controller.GetVisibleEntry()->GetURL());
}

// Tests navigating to a new URL when there is a pending back/forward
// navigation. This will happen if the user hits back, but before that commits,
// they navigate somewhere new.
TEST_F(NavigationControllerTest, LoadURL_ExistingPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // First make some history.
  const GURL kExistingURL1("http://foo/eh");
  controller.LoadURL(
      kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(kExistingURL1);
  main_test_rfh()->SendNavigate(0, kExistingURL1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  const GURL kExistingURL2("http://foo/bee");
  controller.LoadURL(
      kExistingURL2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(kExistingURL2);
  main_test_rfh()->SendNavigate(1, kExistingURL2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now make a pending back/forward navigation. The zeroth entry should be
  // pending.
  controller.GoBack();
  EXPECT_EQ(0U, notifications.size());
  EXPECT_EQ(0, controller.GetPendingEntryIndex());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Before that commits, do a new navigation.
  const GURL kNewURL("http://foo/see");
  main_test_rfh()->PrepareForCommit(kNewURL);
  main_test_rfh()->SendNavigate(3, kNewURL);

  // There should no longer be any pending entry, and the third navigation we
  // just made should be committed.
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(kNewURL, controller.GetVisibleEntry()->GetURL());
}

// Tests navigating to a new URL when there is a pending back/forward
// navigation to a cross-process, privileged URL. This will happen if the user
// hits back, but before that commits, they navigate somewhere new.
TEST_F(NavigationControllerTest, LoadURL_PrivilegedPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // First make some history, starting with a privileged URL.
  const GURL kExistingURL1("http://privileged");
  controller.LoadURL(
      kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  // Pretend it has bindings so we can tell if we incorrectly copy it.
  main_test_rfh()->GetRenderViewHost()->AllowBindings(2);
  main_test_rfh()->PrepareForCommit(kExistingURL1);
  main_test_rfh()->SendNavigate(0, kExistingURL1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Navigate cross-process to a second URL.
  const GURL kExistingURL2("http://foo/eh");
  controller.LoadURL(
      kExistingURL2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(kExistingURL2);
  TestRenderFrameHost* foo_rfh = contents()->GetPendingMainFrame();
  foo_rfh->SendNavigate(1, kExistingURL2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now make a pending back/forward navigation to a privileged entry.
  // The zeroth entry should be pending.
  controller.GoBack();
  foo_rfh->SendBeforeUnloadACK(true);
  EXPECT_EQ(0U, notifications.size());
  EXPECT_EQ(0, controller.GetPendingEntryIndex());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(2, NavigationEntryImpl::FromNavigationEntry(
                controller.GetPendingEntry())->bindings());

  // Before that commits, do a new navigation.
  const GURL kNewURL("http://foo/bee");
  foo_rfh->PrepareForCommit(kNewURL);
  foo_rfh->SendNavigate(3, kNewURL);

  // There should no longer be any pending entry, and the third navigation we
  // just made should be committed.
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(kNewURL, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(0, NavigationEntryImpl::FromNavigationEntry(
                controller.GetLastCommittedEntry())->bindings());
}

// Tests navigating to an existing URL when there is a pending new navigation.
// This will happen if the user enters a URL, but before that commits, the
// current page fires history.back().
TEST_F(NavigationControllerTest, LoadURL_BackPreemptsPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // First make some history.
  const GURL kExistingURL1("http://foo/eh");
  controller.LoadURL(
      kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(kExistingURL1);
  main_test_rfh()->SendNavigate(0, kExistingURL1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  const GURL kExistingURL2("http://foo/bee");
  controller.LoadURL(
      kExistingURL2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(kExistingURL2);
  main_test_rfh()->SendNavigate(1, kExistingURL2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now make a pending new navigation.
  const GURL kNewURL("http://foo/see");
  controller.LoadURL(
      kNewURL, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Before that commits, a back navigation from the renderer commits.
  main_test_rfh()->PrepareForCommit(kExistingURL1);
  main_test_rfh()->SendNavigate(0, kExistingURL1);

  // There should no longer be any pending entry, and the back navigation we
  // just made should be committed.
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(kExistingURL1, controller.GetVisibleEntry()->GetURL());
}

// Tests an ignored navigation when there is a pending new navigation.
// This will happen if the user enters a URL, but before that commits, the
// current blank page reloads.  See http://crbug.com/77507.
TEST_F(NavigationControllerTest, LoadURL_IgnorePreemptsPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Set a WebContentsDelegate to listen for state changes.
  scoped_ptr<TestWebContentsDelegate> delegate(new TestWebContentsDelegate());
  EXPECT_FALSE(contents()->GetDelegate());
  contents()->SetDelegate(delegate.get());

  // Without any navigations, the renderer starts at about:blank.
  const GURL kExistingURL(url::kAboutBlankURL);

  // Now make a pending new navigation.
  const GURL kNewURL("http://eh");
  controller.LoadURL(
      kNewURL, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(-1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(1, delegate->navigation_state_change_count());

  // Before that commits, a document.write and location.reload can cause the
  // renderer to send a FrameNavigate with page_id -1.
  main_test_rfh()->PrepareForCommit(kExistingURL);
  main_test_rfh()->SendNavigate(-1, kExistingURL);

  // This should clear the pending entry and notify of a navigation state
  // change, so that we do not keep displaying kNewURL.
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(-1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(2, delegate->navigation_state_change_count());

  contents()->SetDelegate(NULL);
}

// Tests that the pending entry state is correct after an abort.
// We do not want to clear the pending entry, so that the user doesn't
// lose a typed URL.  (See http://crbug.com/9682.)
TEST_F(NavigationControllerTest, LoadURL_AbortDoesntCancelPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Set a WebContentsDelegate to listen for state changes.
  scoped_ptr<TestWebContentsDelegate> delegate(new TestWebContentsDelegate());
  EXPECT_FALSE(contents()->GetDelegate());
  contents()->SetDelegate(delegate.get());

  // Start with a pending new navigation.
  const GURL kNewURL("http://eh");
  controller.LoadURL(
      kNewURL, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(-1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(1, delegate->navigation_state_change_count());

  // It may abort before committing, if it's a download or due to a stop or
  // a new navigation from the user.
  FrameHostMsg_DidFailProvisionalLoadWithError_Params params;
  params.error_code = net::ERR_ABORTED;
  params.error_description = base::string16();
  params.url = kNewURL;
  params.showing_repost_interstitial = false;
  main_test_rfh()->OnMessageReceived(
      FrameHostMsg_DidFailProvisionalLoadWithError(0,  // routing_id
                                                   params));

  // This should not clear the pending entry or notify of a navigation state
  // change, so that we keep displaying kNewURL (until the user clears it).
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(-1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(1, delegate->navigation_state_change_count());
  NavigationEntry* pending_entry = controller.GetPendingEntry();

  // Ensure that a reload keeps the same pending entry.
  controller.Reload(true);
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(pending_entry, controller.GetPendingEntry());
  EXPECT_EQ(-1, controller.GetLastCommittedEntryIndex());

  contents()->SetDelegate(NULL);
}

// Tests that the pending URL is not visible during a renderer-initiated
// redirect and abort.  See http://crbug.com/83031.
TEST_F(NavigationControllerTest, LoadURL_RedirectAbortDoesntShowPendingURL) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // First make an existing committed entry.
  const GURL kExistingURL("http://foo/eh");
  controller.LoadURL(kExistingURL, content::Referrer(),
                     ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(1, kExistingURL);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Set a WebContentsDelegate to listen for state changes.
  scoped_ptr<TestWebContentsDelegate> delegate(new TestWebContentsDelegate());
  EXPECT_FALSE(contents()->GetDelegate());
  contents()->SetDelegate(delegate.get());

  // Now make a pending new navigation, initiated by the renderer.
  const GURL kNewURL("http://foo/bee");
  NavigationController::LoadURLParams load_url_params(kNewURL);
  load_url_params.transition_type = ui::PAGE_TRANSITION_TYPED;
  load_url_params.is_renderer_initiated = true;
  controller.LoadURLWithParams(load_url_params);
  EXPECT_EQ(0U, notifications.size());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(0, delegate->navigation_state_change_count());

  // The visible entry should be the last committed URL, not the pending one.
  EXPECT_EQ(kExistingURL, controller.GetVisibleEntry()->GetURL());

  // Now the navigation redirects. (There is no corresponding message here.)
  const GURL kRedirectURL("http://foo/see");

  // We don't want to change the NavigationEntry's url, in case it cancels.
  // Prevents regression of http://crbug.com/77786.
  EXPECT_EQ(kNewURL, controller.GetPendingEntry()->GetURL());

  // It may abort before committing, if it's a download or due to a stop or
  // a new navigation from the user.
  FrameHostMsg_DidFailProvisionalLoadWithError_Params params;
  params.error_code = net::ERR_ABORTED;
  params.error_description = base::string16();
  params.url = kRedirectURL;
  params.showing_repost_interstitial = false;
  main_test_rfh()->OnMessageReceived(
      FrameHostMsg_DidFailProvisionalLoadWithError(0,  // routing_id
                                                   params));

  // Because the pending entry is renderer initiated and not visible, we
  // clear it when it fails.
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(1, delegate->navigation_state_change_count());

  // The visible entry should be the last committed URL, not the pending one,
  // so that no spoof is possible.
  EXPECT_EQ(kExistingURL, controller.GetVisibleEntry()->GetURL());

  contents()->SetDelegate(NULL);
}

// Ensure that NavigationEntries track which bindings their RenderViewHost had
// at the time they committed.  http://crbug.com/173672.
TEST_F(NavigationControllerTest, LoadURL_WithBindings) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);
  std::vector<GURL> url_chain;

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  // Navigate to a first, unprivileged URL.
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(NavigationEntryImpl::kInvalidBindings,
            NavigationEntryImpl::FromNavigationEntry(
                controller.GetPendingEntry())->bindings());

  // Commit.
  TestRenderFrameHost* orig_rfh = contents()->GetMainFrame();
  orig_rfh->PrepareForCommit(url1);
  orig_rfh->SendNavigate(0, url1);
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(0, NavigationEntryImpl::FromNavigationEntry(
      controller.GetLastCommittedEntry())->bindings());

  // Manually increase the number of active frames in the SiteInstance
  // that orig_rfh belongs to, to prevent it from being destroyed when
  // it gets swapped out, so that we can reuse orig_rfh when the
  // controller goes back.
  orig_rfh->GetSiteInstance()->increment_active_frame_count();

  // Navigate to a second URL, simulate the beforeunload ack for the cross-site
  // transition, and set bindings on the pending RenderViewHost to simulate a
  // privileged url.
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  orig_rfh->PrepareForCommit(url2);
  TestRenderFrameHost* new_rfh = contents()->GetPendingMainFrame();
  new_rfh->GetRenderViewHost()->AllowBindings(1);
  new_rfh->SendNavigate(1, url2);

  // The second load should be committed, and bindings should be remembered.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_EQ(1, NavigationEntryImpl::FromNavigationEntry(
      controller.GetLastCommittedEntry())->bindings());

  // Going back, the first entry should still appear unprivileged.
  controller.GoBack();
  new_rfh->PrepareForCommit(url1);
  orig_rfh->SendNavigate(0, url1);
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(0, NavigationEntryImpl::FromNavigationEntry(
      controller.GetLastCommittedEntry())->bindings());
}

TEST_F(NavigationControllerTest, Reload) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  ASSERT_TRUE(controller.GetVisibleEntry());
  controller.GetVisibleEntry()->SetTitle(base::ASCIIToUTF16("Title"));
  controller.Reload(true);
  EXPECT_EQ(0U, notifications.size());

  const base::Time timestamp = controller.GetVisibleEntry()->GetTimestamp();
  EXPECT_FALSE(timestamp.is_null());

  // The reload is pending.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  // Make sure the title has been cleared (will be redrawn just after reload).
  // Avoids a stale cached title when the new page being reloaded has no title.
  // See http://crbug.com/96041.
  EXPECT_TRUE(controller.GetVisibleEntry()->GetTitle().empty());

  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now the reload is committed.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());

  // The timestamp should have been updated.
  ASSERT_TRUE(controller.GetVisibleEntry());
  EXPECT_GE(controller.GetVisibleEntry()->GetTimestamp(), timestamp);
}

// Tests what happens when a reload navigation produces a new page.
TEST_F(NavigationControllerTest, Reload_GeneratesNewPage) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.Reload(true);
  EXPECT_EQ(0U, notifications.size());

  main_test_rfh()->PrepareForCommit(url2);
  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now the reload is committed.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

// This test ensures that when a guest renderer reloads, the reload goes through
// without ending up in the "we have a wrong process for the URL" branch in
// NavigationControllerImpl::ReloadInternal.
TEST_F(NavigationControllerTest, ReloadWithGuest) {
  NavigationControllerImpl& controller = controller_impl();

  const GURL url1("http://foo1");
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, url1);
  ASSERT_TRUE(controller.GetVisibleEntry());

  // Make the entry believe its RenderProcessHost is a guest.
  NavigationEntryImpl* entry1 =
      NavigationEntryImpl::FromNavigationEntry(controller.GetVisibleEntry());
  reinterpret_cast<MockRenderProcessHost*>(
      entry1->site_instance()->GetProcess())->set_is_isolated_guest(true);

  // And reload.
  controller.Reload(true);

  // The reload is pending. Check that the NavigationEntry didn't get replaced
  // because of having the wrong process.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 0);

  NavigationEntryImpl* entry2 =
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry());
  EXPECT_EQ(entry1, entry2);
}

#if !defined(OS_ANDROID)  // http://crbug.com/157428
TEST_F(NavigationControllerTest, ReloadOriginalRequestURL) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL original_url("http://foo1");
  const GURL final_url("http://foo2");

  // Load up the original URL, but get redirected.
  controller.LoadURL(
      original_url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->PrepareForCommit(final_url);
  main_test_rfh()->SendNavigateWithOriginalRequestURL(
      0, final_url, original_url);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The NavigationEntry should save both the original URL and the final
  // redirected URL.
  EXPECT_EQ(
      original_url, controller.GetVisibleEntry()->GetOriginalRequestURL());
  EXPECT_EQ(final_url, controller.GetVisibleEntry()->GetURL());

  // Reload using the original URL.
  controller.GetVisibleEntry()->SetTitle(base::ASCIIToUTF16("Title"));
  controller.ReloadOriginalRequestURL(false);
  EXPECT_EQ(0U, notifications.size());

  // The reload is pending.  The request should point to the original URL.
  EXPECT_EQ(original_url, navigated_url());
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());

  // Make sure the title has been cleared (will be redrawn just after reload).
  // Avoids a stale cached title when the new page being reloaded has no title.
  // See http://crbug.com/96041.
  EXPECT_TRUE(controller.GetVisibleEntry()->GetTitle().empty());

  // Send that the navigation has proceeded; say it got redirected again.
  main_test_rfh()->PrepareForCommit(final_url);
  main_test_rfh()->SendNavigate(0, final_url);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now the reload is committed.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

#endif  // !defined(OS_ANDROID)

// Test that certain non-persisted NavigationEntryImpl values get reset after
// commit.
TEST_F(NavigationControllerTest, ResetEntryValuesAfterCommit) {
  NavigationControllerImpl& controller = controller_impl();

  // The value of "should replace entry" will be tested, but it's an error to
  // specify it when there are no entries. Create a simple entry to be replaced.
  const GURL url0("http://foo/0");
  controller.LoadURL(
      url0, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, url0);

  // Set up the pending entry.
  const GURL url1("http://foo/1");
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  // Set up some sample values.
  const unsigned char* raw_data =
      reinterpret_cast<const unsigned char*>("post\n\n\0data");
  const int length = 11;
  std::vector<unsigned char> post_data_vector(raw_data, raw_data+length);
  scoped_refptr<base::RefCountedBytes> post_data =
      base::RefCountedBytes::TakeVector(&post_data_vector);
  GlobalRequestID transfer_id(3, 4);

  // Set non-persisted values on the pending entry.
  NavigationEntryImpl* pending_entry =
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry());
  pending_entry->SetBrowserInitiatedPostData(post_data.get());
  pending_entry->set_is_renderer_initiated(true);
  pending_entry->set_transferred_global_request_id(transfer_id);
  pending_entry->set_should_replace_entry(true);
  pending_entry->set_should_clear_history_list(true);
  EXPECT_EQ(post_data.get(), pending_entry->GetBrowserInitiatedPostData());
  EXPECT_TRUE(pending_entry->is_renderer_initiated());
  EXPECT_EQ(transfer_id, pending_entry->transferred_global_request_id());
  EXPECT_TRUE(pending_entry->should_replace_entry());
  EXPECT_TRUE(pending_entry->should_clear_history_list());

  // Fake a commit response.
  main_test_rfh()->SendNavigate(1, url1);

  // Certain values that are only used for pending entries get reset after
  // commit.
  NavigationEntryImpl* committed_entry =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetLastCommittedEntry());
  EXPECT_FALSE(committed_entry->GetBrowserInitiatedPostData());
  EXPECT_FALSE(committed_entry->is_renderer_initiated());
  EXPECT_EQ(GlobalRequestID(-1, -1),
            committed_entry->transferred_global_request_id());
  EXPECT_FALSE(committed_entry->should_replace_entry());
  EXPECT_FALSE(committed_entry->should_clear_history_list());
}

// Test that Redirects are preserved after a commit.
TEST_F(NavigationControllerTest, RedirectsAreNotResetByCommit) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  // Set up some redirect values.
  std::vector<GURL> redirects;
  redirects.push_back(GURL("http://foo2"));

  // Set redirects on the pending entry.
  NavigationEntryImpl* pending_entry =
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry());
  pending_entry->SetRedirectChain(redirects);
  EXPECT_EQ(1U, pending_entry->GetRedirectChain().size());
  EXPECT_EQ(GURL("http://foo2"), pending_entry->GetRedirectChain()[0]);

  // Normal navigation will preserve redirects in the committed entry.
  main_test_rfh()->SendNavigateWithRedirects(0, url1, redirects);
  NavigationEntryImpl* committed_entry =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetLastCommittedEntry());
  ASSERT_EQ(1U, committed_entry->GetRedirectChain().size());
  EXPECT_EQ(GURL("http://foo2"), committed_entry->GetRedirectChain()[0]);
}

// Tests what happens when we navigate back successfully
TEST_F(NavigationControllerTest, Back) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  const GURL url2("http://foo2");
  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.GoBack();
  EXPECT_EQ(0U, notifications.size());

  // We should now have a pending navigation to go back.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoToOffset(-1));
  EXPECT_TRUE(controller.CanGoForward());
  EXPECT_TRUE(controller.CanGoToOffset(1));
  EXPECT_FALSE(controller.CanGoToOffset(2));  // Cannot go foward 2 steps.

  // Timestamp for entry 1 should be on or after that of entry 0.
  EXPECT_FALSE(controller.GetEntryAtIndex(0)->GetTimestamp().is_null());
  EXPECT_GE(controller.GetEntryAtIndex(1)->GetTimestamp(),
            controller.GetEntryAtIndex(0)->GetTimestamp());

  main_test_rfh()->SendNavigate(0, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The back navigation completed successfully.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoToOffset(-1));
  EXPECT_TRUE(controller.CanGoForward());
  EXPECT_TRUE(controller.CanGoToOffset(1));
  EXPECT_FALSE(controller.CanGoToOffset(2));  // Cannot go foward 2 steps.

  // Timestamp for entry 0 should be on or after that of entry 1
  // (since we went back to it).
  EXPECT_GE(controller.GetEntryAtIndex(0)->GetTimestamp(),
            controller.GetEntryAtIndex(1)->GetTimestamp());
}

// Tests what happens when a back navigation produces a new page.
TEST_F(NavigationControllerTest, Back_GeneratesNewPage) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url2);
  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.GoBack();
  EXPECT_EQ(0U, notifications.size());

  // We should now have a pending navigation to go back.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_TRUE(controller.CanGoForward());

  main_test_rfh()->PrepareForCommit(url3);
  main_test_rfh()->SendNavigate(2, url3);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The back navigation resulted in a completely new navigation.
  // TODO(darin): perhaps this behavior will be confusing to users?
  EXPECT_EQ(controller.GetEntryCount(), 3);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 2);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

// Receives a back message when there is a new pending navigation entry.
TEST_F(NavigationControllerTest, Back_NewPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL kUrl1("http://foo1");
  const GURL kUrl2("http://foo2");
  const GURL kUrl3("http://foo3");

  // First navigate two places so we have some back history.
  main_test_rfh()->SendNavigate(0, kUrl1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // controller.LoadURL(kUrl2, ui::PAGE_TRANSITION_TYPED);
  main_test_rfh()->SendNavigate(1, kUrl2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now start a new pending navigation and go back before it commits.
  controller.LoadURL(
      kUrl3, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(kUrl3, controller.GetPendingEntry()->GetURL());
  controller.GoBack();

  // The pending navigation should now be the "back" item and the new one
  // should be gone.
  EXPECT_EQ(0, controller.GetPendingEntryIndex());
  EXPECT_EQ(kUrl1, controller.GetPendingEntry()->GetURL());
}

// Receives a back message when there is a different renavigation already
// pending.
TEST_F(NavigationControllerTest, Back_OtherBackPending) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL kUrl1("http://foo/1");
  const GURL kUrl2("http://foo/2");
  const GURL kUrl3("http://foo/3");

  // First navigate three places so we have some back history.
  main_test_rfh()->PrepareForCommit(kUrl1);
  main_test_rfh()->SendNavigate(0, kUrl1);
  main_test_rfh()->PrepareForCommit(kUrl2);
  main_test_rfh()->SendNavigate(1, kUrl2);
  main_test_rfh()->PrepareForCommit(kUrl3);
  main_test_rfh()->SendNavigate(2, kUrl3);

  // With nothing pending, say we get a navigation to the second entry.
  main_test_rfh()->PrepareForCommit(kUrl2);
  main_test_rfh()->SendNavigate(1, kUrl2);

  // We know all the entries have the same site instance, so we can just grab
  // a random one for looking up other entries.
  SiteInstance* site_instance =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetLastCommittedEntry())->site_instance();

  // That second URL should be the last committed and it should have gotten the
  // new title.
  EXPECT_EQ(kUrl2, controller.GetEntryWithPageID(site_instance, 1)->GetURL());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());

  // Now go forward to the last item again and say it was committed.
  controller.GoForward();
  main_test_rfh()->PrepareForCommit(kUrl3);
  main_test_rfh()->SendNavigate(2, kUrl3);

  // Now start going back one to the second page. It will be pending.
  controller.GoBack();
  EXPECT_EQ(1, controller.GetPendingEntryIndex());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());

  // Not synthesize a totally new back event to the first page. This will not
  // match the pending one.
  main_test_rfh()->PrepareForCommit(kUrl1);
  main_test_rfh()->SendNavigate(0, kUrl1);

  // The committed navigation should clear the pending entry.
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());

  // But the navigated entry should be the last committed.
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(kUrl1, controller.GetLastCommittedEntry()->GetURL());
}

// Tests what happens when we navigate forward successfully.
TEST_F(NavigationControllerTest, Forward) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  main_test_rfh()->PrepareForCommit(url2);
  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.GoBack();
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.GoForward();

  // We should now have a pending navigation to go forward.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_TRUE(controller.CanGoToOffset(-1));
  EXPECT_FALSE(controller.CanGoToOffset(-2));  // Cannot go back 2 steps.
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_FALSE(controller.CanGoToOffset(1));

  // Timestamp for entry 0 should be on or after that of entry 1
  // (since we went back to it).
  EXPECT_FALSE(controller.GetEntryAtIndex(0)->GetTimestamp().is_null());
  EXPECT_GE(controller.GetEntryAtIndex(0)->GetTimestamp(),
            controller.GetEntryAtIndex(1)->GetTimestamp());

  main_test_rfh()->PrepareForCommit(url2);
  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The forward navigation completed successfully.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_TRUE(controller.CanGoToOffset(-1));
  EXPECT_FALSE(controller.CanGoToOffset(-2));  // Cannot go back 2 steps.
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_FALSE(controller.CanGoToOffset(1));

  // Timestamp for entry 1 should be on or after that of entry 0
  // (since we went forward to it).
  EXPECT_GE(controller.GetEntryAtIndex(1)->GetTimestamp(),
            controller.GetEntryAtIndex(0)->GetTimestamp());
}

// Tests what happens when a forward navigation produces a new page.
TEST_F(NavigationControllerTest, Forward_GeneratesNewPage) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");
  const GURL url3("http://foo3");

  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  main_test_rfh()->PrepareForCommit(url2);
  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.GoBack();
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.GoForward();
  EXPECT_EQ(0U, notifications.size());

  // Should now have a pending navigation to go forward.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());

  main_test_rfh()->PrepareForCommit(url3);
  main_test_rfh()->SendNavigate(2, url3);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(notifications.Check1AndReset(NOTIFICATION_NAV_LIST_PRUNED));

  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

// Two consequent navigation for the same URL entered in should be considered
// as SAME_PAGE navigation even when we are redirected to some other page.
TEST_F(NavigationControllerTest, Redirect) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");  // Redirection target

  // First request
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->SendNavigate(0, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Second request
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());

  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_SERVER_REDIRECT;
  params.redirects.push_back(GURL("http://foo1"));
  params.redirects.push_back(GURL("http://foo2"));
  params.should_update_history = false;
  params.gesture = NavigationGestureAuto;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);

  LoadCommittedDetails details;

  EXPECT_EQ(0U, notifications.size());
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  EXPECT_TRUE(details.type == NAVIGATION_TYPE_SAME_PAGE);
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());

  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

// Similar to Redirect above, but the first URL is requested by POST,
// the second URL is requested by GET. NavigationEntry::has_post_data_
// must be cleared. http://crbug.com/21245
TEST_F(NavigationControllerTest, PostThenRedirect) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");  // Redirection target

  // First request as POST
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  controller.GetVisibleEntry()->SetHasPostData(true);

  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->SendNavigate(0, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Second request
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());

  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_SERVER_REDIRECT;
  params.redirects.push_back(GURL("http://foo1"));
  params.redirects.push_back(GURL("http://foo2"));
  params.should_update_history = false;
  params.gesture = NavigationGestureAuto;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);

  LoadCommittedDetails details;

  EXPECT_EQ(0U, notifications.size());
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  EXPECT_TRUE(details.type == NAVIGATION_TYPE_SAME_PAGE);
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());
  EXPECT_FALSE(controller.GetVisibleEntry()->GetHasPostData());

  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

// A redirect right off the bat should be a NEW_PAGE.
TEST_F(NavigationControllerTest, ImmediateRedirect) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");  // Redirection target

  // First request
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());

  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_SERVER_REDIRECT;
  params.redirects.push_back(GURL("http://foo1"));
  params.redirects.push_back(GURL("http://foo2"));
  params.should_update_history = false;
  params.gesture = NavigationGestureAuto;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);

  LoadCommittedDetails details;

  EXPECT_EQ(0U, notifications.size());
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  EXPECT_TRUE(details.type == NAVIGATION_TYPE_NEW_PAGE);
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());

  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

// Tests navigation via link click within a subframe. A new navigation entry
// should be created.
TEST_F(NavigationControllerTest, NewSubframe) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  const GURL url2("http://foo2");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 1;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_MANUAL_SUBFRAME;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);

  LoadCommittedDetails details;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(url1, details.previous_url);
  EXPECT_FALSE(details.is_in_page);
  EXPECT_FALSE(details.is_main_frame);

  // The new entry should be appended.
  EXPECT_EQ(2, controller.GetEntryCount());

  // New entry should refer to the new page, but the old URL (entries only
  // reflect the toplevel URL).
  EXPECT_EQ(url1, details.entry->GetURL());
  EXPECT_EQ(params.page_id, details.entry->GetPageID());
}

// Some pages create a popup, then write an iframe into it. This causes a
// subframe navigation without having any committed entry. Such navigations
// just get thrown on the ground, but we shouldn't crash.
TEST_F(NavigationControllerTest, SubframeOnEmptyPage) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Navigation controller currently has no entries.
  const GURL url("http://foo2");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 1;
  params.url = url;
  params.transition = ui::PAGE_TRANSITION_AUTO_SUBFRAME;
  params.should_update_history = false;
  params.gesture = NavigationGestureAuto;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url);

  LoadCommittedDetails details;
  EXPECT_FALSE(controller.RendererDidNavigate(main_test_rfh(), params,
                                              &details));
  EXPECT_EQ(0U, notifications.size());
}

// Auto subframes are ones the page loads automatically like ads. They should
// not create new navigation entries.
TEST_F(NavigationControllerTest, AutoSubframe) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  const GURL url2("http://foo2");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_AUTO_SUBFRAME;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);

  // Navigating should do nothing.
  LoadCommittedDetails details;
  EXPECT_FALSE(controller.RendererDidNavigate(main_test_rfh(), params,
                                              &details));
  EXPECT_EQ(0U, notifications.size());

  // There should still be only one entry.
  EXPECT_EQ(1, controller.GetEntryCount());
}

// Tests navigation and then going back to a subframe navigation.
TEST_F(NavigationControllerTest, BackSubframe) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Main page.
  const GURL url1("http://foo1");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // First manual subframe navigation.
  const GURL url2("http://foo2");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 1;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_MANUAL_SUBFRAME;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);

  // This should generate a new entry.
  LoadCommittedDetails details;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(2, controller.GetEntryCount());

  // Second manual subframe navigation should also make a new entry.
  const GURL url3("http://foo3");
  params.page_id = 2;
  params.url = url3;
  params.transition = ui::PAGE_TRANSITION_MANUAL_SUBFRAME;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetCurrentEntryIndex());

  // Go back one.
  controller.GoBack();
  params.page_id = 1;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_AUTO_SUBFRAME;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetCurrentEntryIndex());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());

  // Go back one more.
  controller.GoBack();
  params.page_id = 0;
  params.url = url1;
  params.transition = ui::PAGE_TRANSITION_AUTO_SUBFRAME;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetCurrentEntryIndex());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());
}

TEST_F(NavigationControllerTest, LinkClick) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Should not have produced a new session history entry.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

TEST_F(NavigationControllerTest, InPage) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Main page.
  const GURL url1("http://foo");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Ensure main page navigation to same url respects the was_within_same_page
  // hint provided in the params.
  FrameHostMsg_DidCommitProvisionalLoad_Params self_params;
  self_params.page_id = 0;
  self_params.url = url1;
  self_params.transition = ui::PAGE_TRANSITION_LINK;
  self_params.should_update_history = false;
  self_params.gesture = NavigationGestureUser;
  self_params.is_post = false;
  self_params.page_state = PageState::CreateFromURL(url1);
  self_params.was_within_same_page = true;

  LoadCommittedDetails details;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), self_params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(details.is_in_page);
  EXPECT_TRUE(details.did_replace_entry);
  EXPECT_EQ(1, controller.GetEntryCount());

  // Fragment navigation to a new page_id.
  const GURL url2("http://foo#a");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 1;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_LINK;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);
  params.was_within_same_page = true;

  // This should generate a new entry.
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(details.is_in_page);
  EXPECT_FALSE(details.did_replace_entry);
  EXPECT_EQ(2, controller.GetEntryCount());

  // Go back one.
  FrameHostMsg_DidCommitProvisionalLoad_Params back_params(params);
  controller.GoBack();
  back_params.url = url1;
  back_params.page_id = 0;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), back_params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(details.is_in_page);
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetCurrentEntryIndex());
  EXPECT_EQ(back_params.url, controller.GetVisibleEntry()->GetURL());

  // Go forward
  FrameHostMsg_DidCommitProvisionalLoad_Params forward_params(params);
  controller.GoForward();
  forward_params.url = url2;
  forward_params.page_id = 1;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), forward_params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(details.is_in_page);
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetCurrentEntryIndex());
  EXPECT_EQ(forward_params.url,
            controller.GetVisibleEntry()->GetURL());

  // Now go back and forward again. This is to work around a bug where we would
  // compare the incoming URL with the last committed entry rather than the
  // one identified by an existing page ID. This would result in the second URL
  // losing the reference fragment when you navigate away from it and then back.
  controller.GoBack();
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), back_params,
                                             &details));
  controller.GoForward();
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), forward_params,
                                             &details));
  EXPECT_EQ(forward_params.url,
            controller.GetVisibleEntry()->GetURL());

  // Finally, navigate to an unrelated URL to make sure in_page is not sticky.
  const GURL url3("http://bar");
  params.page_id = 2;
  params.url = url3;
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_FALSE(details.is_in_page);
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetCurrentEntryIndex());
}

TEST_F(NavigationControllerTest, InPage_Replace) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Main page.
  const GURL url1("http://foo");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // First navigation.
  const GURL url2("http://foo#a");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;  // Same page_id
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_LINK;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);
  params.was_within_same_page = true;

  // This should NOT generate a new entry, nor prune the list.
  LoadCommittedDetails details;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(details.is_in_page);
  EXPECT_TRUE(details.did_replace_entry);
  EXPECT_EQ(1, controller.GetEntryCount());
}

// Tests for http://crbug.com/40395
// Simulates this:
//   <script>
//     window.location.replace("#a");
//     window.location='http://foo3/';
//   </script>
TEST_F(NavigationControllerTest, ClientRedirectAfterInPageNavigation) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Load an initial page.
  {
    const GURL url("http://foo/");
    main_test_rfh()->SendNavigate(0, url);
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
  }

  // Navigate to a new page.
  {
    const GURL url("http://foo2/");
    main_test_rfh()->SendNavigate(1, url);
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
  }

  // Navigate within the page.
  {
    const GURL url("http://foo2/#a");
    FrameHostMsg_DidCommitProvisionalLoad_Params params;
    params.page_id = 1;  // Same page_id
    params.url = url;
    params.transition = ui::PAGE_TRANSITION_LINK;
    params.redirects.push_back(url);
    params.should_update_history = true;
    params.gesture = NavigationGestureUnknown;
    params.is_post = false;
    params.page_state = PageState::CreateFromURL(url);
    params.was_within_same_page = true;

    // This should NOT generate a new entry, nor prune the list.
    LoadCommittedDetails details;
    EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                               &details));
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
    EXPECT_TRUE(details.is_in_page);
    EXPECT_TRUE(details.did_replace_entry);
    EXPECT_EQ(2, controller.GetEntryCount());
  }

  // Perform a client redirect to a new page.
  {
    const GURL url("http://foo3/");
    FrameHostMsg_DidCommitProvisionalLoad_Params params;
    params.page_id = 2;  // New page_id
    params.url = url;
    params.transition = ui::PAGE_TRANSITION_CLIENT_REDIRECT;
    params.redirects.push_back(GURL("http://foo2/#a"));
    params.redirects.push_back(url);
    params.should_update_history = true;
    params.gesture = NavigationGestureUnknown;
    params.is_post = false;
    params.page_state = PageState::CreateFromURL(url);

    // This SHOULD generate a new entry.
    LoadCommittedDetails details;
    EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                               &details));
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
    EXPECT_FALSE(details.is_in_page);
    EXPECT_EQ(3, controller.GetEntryCount());
  }

  // Verify that BACK brings us back to http://foo2/.
  {
    const GURL url("http://foo2/");
    controller.GoBack();
    main_test_rfh()->SendNavigate(1, url);
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
    EXPECT_EQ(url, controller.GetVisibleEntry()->GetURL());
  }
}

TEST_F(NavigationControllerTest, PushStateWithoutPreviousEntry)
{
  ASSERT_FALSE(controller_impl().GetLastCommittedEntry());
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  GURL url("http://foo");
  params.page_id = 1;
  params.url = url;
  params.page_state = PageState::CreateFromURL(url);
  params.was_within_same_page = true;
  contents()->GetMainFrame()->SendNavigateWithParams(&params);
  // We pass if we don't crash.
}

// NotificationObserver implementation used in verifying we've received the
// NOTIFICATION_NAV_LIST_PRUNED method.
class PrunedListener : public NotificationObserver {
 public:
  explicit PrunedListener(NavigationControllerImpl* controller)
      : notification_count_(0) {
    registrar_.Add(this, NOTIFICATION_NAV_LIST_PRUNED,
                   Source<NavigationController>(controller));
  }

  void Observe(int type,
               const NotificationSource& source,
               const NotificationDetails& details) override {
    if (type == NOTIFICATION_NAV_LIST_PRUNED) {
      notification_count_++;
      details_ = *(Details<PrunedDetails>(details).ptr());
    }
  }

  // Number of times NAV_LIST_PRUNED has been observed.
  int notification_count_;

  // Details from the last NAV_LIST_PRUNED.
  PrunedDetails details_;

 private:
  NotificationRegistrar registrar_;

  DISALLOW_COPY_AND_ASSIGN(PrunedListener);
};

// Tests that we limit the number of navigation entries created correctly.
TEST_F(NavigationControllerTest, EnforceMaxNavigationCount) {
  NavigationControllerImpl& controller = controller_impl();
  size_t original_count = NavigationControllerImpl::max_entry_count();
  const int kMaxEntryCount = 5;

  NavigationControllerImpl::set_max_entry_count_for_testing(kMaxEntryCount);

  int url_index;
  // Load up to the max count, all entries should be there.
  for (url_index = 0; url_index < kMaxEntryCount; url_index++) {
    GURL url(base::StringPrintf("http://www.a.com/%d", url_index));
    controller.LoadURL(
        url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
    main_test_rfh()->PrepareForCommit(url);
    main_test_rfh()->SendNavigate(url_index, url);
  }

  EXPECT_EQ(controller.GetEntryCount(), kMaxEntryCount);

  // Created a PrunedListener to observe prune notifications.
  PrunedListener listener(&controller);

  // Navigate some more.
  GURL url(base::StringPrintf("http://www.a.com/%d", url_index));
  controller.LoadURL(
      url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url);
  main_test_rfh()->SendNavigate(url_index, url);
  url_index++;

  // We should have got a pruned navigation.
  EXPECT_EQ(1, listener.notification_count_);
  EXPECT_TRUE(listener.details_.from_front);
  EXPECT_EQ(1, listener.details_.count);

  // We expect http://www.a.com/0 to be gone.
  EXPECT_EQ(controller.GetEntryCount(), kMaxEntryCount);
  EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(),
            GURL("http:////www.a.com/1"));

  // More navigations.
  for (int i = 0; i < 3; i++) {
    url = GURL(base::StringPrintf("http:////www.a.com/%d", url_index));
    controller.LoadURL(
        url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
    main_test_rfh()->PrepareForCommit(url);
    main_test_rfh()->SendNavigate(url_index, url);
    url_index++;
  }
  EXPECT_EQ(controller.GetEntryCount(), kMaxEntryCount);
  EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(),
            GURL("http:////www.a.com/4"));

  NavigationControllerImpl::set_max_entry_count_for_testing(original_count);
}

// Tests that we can do a restore and navigate to the restored entries and
// everything is updated properly. This can be tricky since there is no
// SiteInstance for the entries created initially.
TEST_F(NavigationControllerTest, RestoreNavigate) {
  // Create a NavigationController with a restored set of tabs.
  GURL url("http://foo");
  std::vector<NavigationEntry*> entries;
  NavigationEntry* entry = NavigationControllerImpl::CreateNavigationEntry(
      url, Referrer(), ui::PAGE_TRANSITION_RELOAD, false, std::string(),
      browser_context());
  entry->SetPageID(0);
  entry->SetTitle(base::ASCIIToUTF16("Title"));
  entry->SetPageState(PageState::CreateFromEncodedData("state"));
  const base::Time timestamp = base::Time::Now();
  entry->SetTimestamp(timestamp);
  entries.push_back(entry);
  scoped_ptr<WebContentsImpl> our_contents(static_cast<WebContentsImpl*>(
      WebContents::Create(WebContents::CreateParams(browser_context()))));
  NavigationControllerImpl& our_controller = our_contents->GetController();
  our_controller.Restore(
      0,
      NavigationController::RESTORE_LAST_SESSION_EXITED_CLEANLY,
      &entries);
  ASSERT_EQ(0u, entries.size());

  // Before navigating to the restored entry, it should have a restore_type
  // and no SiteInstance.
  ASSERT_EQ(1, our_controller.GetEntryCount());
  EXPECT_EQ(NavigationEntryImpl::RESTORE_LAST_SESSION_EXITED_CLEANLY,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetEntryAtIndex(0))->restore_type());
  EXPECT_FALSE(NavigationEntryImpl::FromNavigationEntry(
      our_controller.GetEntryAtIndex(0))->site_instance());

  // After navigating, we should have one entry, and it should be "pending".
  // It should now have a SiteInstance and no restore_type.
  our_controller.GoToIndex(0);
  EXPECT_EQ(1, our_controller.GetEntryCount());
  EXPECT_EQ(our_controller.GetEntryAtIndex(0),
            our_controller.GetPendingEntry());
  EXPECT_EQ(0, our_controller.GetEntryAtIndex(0)->GetPageID());
  EXPECT_EQ(NavigationEntryImpl::RESTORE_NONE,
            NavigationEntryImpl::FromNavigationEntry
                (our_controller.GetEntryAtIndex(0))->restore_type());
  EXPECT_TRUE(NavigationEntryImpl::FromNavigationEntry(
      our_controller.GetEntryAtIndex(0))->site_instance());

  // Timestamp should remain the same before the navigation finishes.
  EXPECT_EQ(timestamp, our_controller.GetEntryAtIndex(0)->GetTimestamp());

  // Say we navigated to that entry.
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url;
  params.transition = ui::PAGE_TRANSITION_LINK;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url);
  LoadCommittedDetails details;
  our_controller.RendererDidNavigate(our_contents->GetMainFrame(), params,
                                     &details);

  // There should be no longer any pending entry and one committed one. This
  // means that we were able to locate the entry, assign its site instance, and
  // commit it properly.
  EXPECT_EQ(1, our_controller.GetEntryCount());
  EXPECT_EQ(0, our_controller.GetLastCommittedEntryIndex());
  EXPECT_FALSE(our_controller.GetPendingEntry());
  EXPECT_EQ(url,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetLastCommittedEntry())->site_instance()->
                    GetSiteURL());
  EXPECT_EQ(NavigationEntryImpl::RESTORE_NONE,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetEntryAtIndex(0))->restore_type());

  // Timestamp should have been updated.
  EXPECT_GE(our_controller.GetEntryAtIndex(0)->GetTimestamp(), timestamp);
}

// Tests that we can still navigate to a restored entry after a different
// navigation fails and clears the pending entry.  http://crbug.com/90085
TEST_F(NavigationControllerTest, RestoreNavigateAfterFailure) {
  // Create a NavigationController with a restored set of tabs.
  GURL url("http://foo");
  std::vector<NavigationEntry*> entries;
  NavigationEntry* entry = NavigationControllerImpl::CreateNavigationEntry(
      url, Referrer(), ui::PAGE_TRANSITION_RELOAD, false, std::string(),
      browser_context());
  entry->SetPageID(0);
  entry->SetTitle(base::ASCIIToUTF16("Title"));
  entry->SetPageState(PageState::CreateFromEncodedData("state"));
  entries.push_back(entry);
  scoped_ptr<WebContentsImpl> our_contents(static_cast<WebContentsImpl*>(
      WebContents::Create(WebContents::CreateParams(browser_context()))));
  NavigationControllerImpl& our_controller = our_contents->GetController();
  our_controller.Restore(
      0, NavigationController::RESTORE_LAST_SESSION_EXITED_CLEANLY, &entries);
  ASSERT_EQ(0u, entries.size());

  // Before navigating to the restored entry, it should have a restore_type
  // and no SiteInstance.
  EXPECT_EQ(NavigationEntryImpl::RESTORE_LAST_SESSION_EXITED_CLEANLY,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetEntryAtIndex(0))->restore_type());
  EXPECT_FALSE(NavigationEntryImpl::FromNavigationEntry(
      our_controller.GetEntryAtIndex(0))->site_instance());

  // After navigating, we should have one entry, and it should be "pending".
  // It should now have a SiteInstance and no restore_type.
  our_controller.GoToIndex(0);
  EXPECT_EQ(1, our_controller.GetEntryCount());
  EXPECT_EQ(our_controller.GetEntryAtIndex(0),
            our_controller.GetPendingEntry());
  EXPECT_EQ(0, our_controller.GetEntryAtIndex(0)->GetPageID());
  EXPECT_EQ(NavigationEntryImpl::RESTORE_NONE,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetEntryAtIndex(0))->restore_type());
  EXPECT_TRUE(NavigationEntryImpl::FromNavigationEntry(
      our_controller.GetEntryAtIndex(0))->site_instance());

  // This pending navigation may have caused a different navigation to fail,
  // which causes the pending entry to be cleared.
  FrameHostMsg_DidFailProvisionalLoadWithError_Params fail_load_params;
  fail_load_params.error_code = net::ERR_ABORTED;
  fail_load_params.error_description = base::string16();
  fail_load_params.url = url;
  fail_load_params.showing_repost_interstitial = false;
  main_test_rfh()->OnMessageReceived(
      FrameHostMsg_DidFailProvisionalLoadWithError(0,  // routing_id
                                                  fail_load_params));

  // Now the pending restored entry commits.
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url;
  params.transition = ui::PAGE_TRANSITION_LINK;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url);
  LoadCommittedDetails details;
  our_controller.RendererDidNavigate(our_contents->GetMainFrame(), params,
                                     &details);

  // There should be no pending entry and one committed one.
  EXPECT_EQ(1, our_controller.GetEntryCount());
  EXPECT_EQ(0, our_controller.GetLastCommittedEntryIndex());
  EXPECT_FALSE(our_controller.GetPendingEntry());
  EXPECT_EQ(url,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetLastCommittedEntry())->site_instance()->
                    GetSiteURL());
  EXPECT_EQ(NavigationEntryImpl::RESTORE_NONE,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetEntryAtIndex(0))->restore_type());
}

// Make sure that the page type and stuff is correct after an interstitial.
TEST_F(NavigationControllerTest, Interstitial) {
  NavigationControllerImpl& controller = controller_impl();
  // First navigate somewhere normal.
  const GURL url1("http://foo");
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);

  // Now navigate somewhere with an interstitial.
  const GURL url2("http://bar");
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry())->
      set_page_type(PAGE_TYPE_INTERSTITIAL);

  // At this point the interstitial will be displayed and the load will still
  // be pending. If the user continues, the load will commit.
  main_test_rfh()->PrepareForCommit(url2);
  main_test_rfh()->SendNavigate(1, url2);

  // The page should be a normal page again.
  EXPECT_EQ(url2, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(PAGE_TYPE_NORMAL,
            controller.GetLastCommittedEntry()->GetPageType());
}

TEST_F(NavigationControllerTest, RemoveEntry) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");
  const GURL url4("http://foo/4");
  const GURL url5("http://foo/5");
  const GURL pending_url("http://foo/pending");
  const GURL default_url("http://foo/default");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url2);
  main_test_rfh()->SendNavigate(1, url2);
  controller.LoadURL(
      url3, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url3);
  main_test_rfh()->SendNavigate(2, url3);
  controller.LoadURL(
      url4, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url4);
  main_test_rfh()->SendNavigate(3, url4);
  controller.LoadURL(
      url5, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url5);
  main_test_rfh()->SendNavigate(4, url5);

  // Try to remove the last entry.  Will fail because it is the current entry.
  EXPECT_FALSE(controller.RemoveEntryAtIndex(controller.GetEntryCount() - 1));
  EXPECT_EQ(5, controller.GetEntryCount());
  EXPECT_EQ(4, controller.GetLastCommittedEntryIndex());

  // Go back, but don't commit yet. Check that we can't delete the current
  // and pending entries.
  controller.GoBack();
  EXPECT_FALSE(controller.RemoveEntryAtIndex(controller.GetEntryCount() - 1));
  EXPECT_FALSE(controller.RemoveEntryAtIndex(controller.GetEntryCount() - 2));

  // Now commit and delete the last entry.
  main_test_rfh()->PrepareForCommit(url4);
  main_test_rfh()->SendNavigate(3, url4);
  EXPECT_TRUE(controller.RemoveEntryAtIndex(controller.GetEntryCount() - 1));
  EXPECT_EQ(4, controller.GetEntryCount());
  EXPECT_EQ(3, controller.GetLastCommittedEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());

  // Remove an entry which is not the last committed one.
  EXPECT_TRUE(controller.RemoveEntryAtIndex(0));
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());

  // Remove the 2 remaining entries.
  controller.RemoveEntryAtIndex(1);
  controller.RemoveEntryAtIndex(0);

  // This should leave us with only the last committed entry.
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
}

TEST_F(NavigationControllerTest, RemoveEntryWithPending) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");
  const GURL default_url("http://foo/default");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url2);
  main_test_rfh()->SendNavigate(1, url2);
  controller.LoadURL(
      url3, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url3);
  main_test_rfh()->SendNavigate(2, url3);

  // Go back, but don't commit yet. Check that we can't delete the current
  // and pending entries.
  controller.GoBack();
  EXPECT_FALSE(controller.RemoveEntryAtIndex(2));
  EXPECT_FALSE(controller.RemoveEntryAtIndex(1));

  // Remove the first entry, while there is a pending entry.  This is expected
  // to discard the pending entry.
  EXPECT_TRUE(controller.RemoveEntryAtIndex(0));
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());

  // We should update the last committed entry index.
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Now commit and ensure we land on the right entry.
  main_test_rfh()->PrepareForCommit(url2);
  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());
}

// Tests the transient entry, making sure it goes away with all navigations.
TEST_F(NavigationControllerTest, TransientEntry) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url0("http://foo/0");
  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");
  const GURL url3_ref("http://foo/3#bar");
  const GURL url4("http://foo/4");
  const GURL transient_url("http://foo/transient");

  controller.LoadURL(
      url0, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url0);
  main_test_rfh()->SendNavigate(0, url0);
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(1, url1);

  notifications.Reset();

  // Adding a transient with no pending entry.
  NavigationEntryImpl* transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);

  // We should not have received any notifications.
  EXPECT_EQ(0U, notifications.size());

  // Check our state.
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(controller.GetEntryCount(), 3);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_EQ(contents()->GetMaxPageID(), 1);

  // Navigate.
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(url2);
  main_test_rfh()->SendNavigate(2, url2);

  // We should have navigated, transient entry should be gone.
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(controller.GetEntryCount(), 3);

  // Add a transient again, then navigate with no pending entry this time.
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->PrepareForCommit(url3);
  main_test_rfh()->SendNavigate(3, url3);
  // Transient entry should be gone.
  EXPECT_EQ(url3, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(controller.GetEntryCount(), 4);

  // Initiate a navigation, add a transient then commit navigation.
  controller.LoadURL(
      url4, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->PrepareForCommit(url4);
  main_test_rfh()->SendNavigate(4, url4);
  EXPECT_EQ(url4, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(controller.GetEntryCount(), 5);

  // Add a transient and go back.  This should simply remove the transient.
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  controller.GoBack();
  // Transient entry should be gone.
  EXPECT_EQ(url4, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(controller.GetEntryCount(), 5);
  main_test_rfh()->PrepareForCommit(url3);
  main_test_rfh()->SendNavigate(3, url3);

  // Add a transient and go to an entry before the current one.
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  controller.GoToIndex(1);
  // The navigation should have been initiated, transient entry should be gone.
  EXPECT_FALSE(controller.GetTransientEntry());
  EXPECT_EQ(url1, controller.GetPendingEntry()->GetURL());
  // Visible entry does not update for history navigations until commit.
  EXPECT_EQ(url3, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(1, url1);
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());

  // Add a transient and go to an entry after the current one.
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  controller.GoToIndex(3);
  // The navigation should have been initiated, transient entry should be gone.
  // Because of the transient entry that is removed, going to index 3 makes us
  // land on url2 (which is visible after the commit).
  EXPECT_EQ(url2, controller.GetPendingEntry()->GetURL());
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->PrepareForCommit(url2);
  main_test_rfh()->SendNavigate(2, url2);
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());

  // Add a transient and go forward.
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  EXPECT_TRUE(controller.CanGoForward());
  controller.GoForward();
  // We should have navigated, transient entry should be gone.
  EXPECT_FALSE(controller.GetTransientEntry());
  EXPECT_EQ(url3, controller.GetPendingEntry()->GetURL());
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->PrepareForCommit(url3);
  main_test_rfh()->SendNavigate(3, url3);
  EXPECT_EQ(url3, controller.GetVisibleEntry()->GetURL());

  // Add a transient and do an in-page navigation, replacing the current entry.
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->PrepareForCommit(url3_ref);
  main_test_rfh()->SendNavigate(3, url3_ref);
  // Transient entry should be gone.
  EXPECT_FALSE(controller.GetTransientEntry());
  EXPECT_EQ(url3_ref, controller.GetVisibleEntry()->GetURL());