Created test for title replacement via window.history.replaceState().

ios/web/navigation/history_state_operations_inttest.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/strings/utf_string_conversions.h"
 #include "base/test/ios/wait_util.h"
 #import "ios/web/public/navigation_item.h"
 #import "ios/web/public/navigation_manager.h"
 #import "ios/web/public/test/http_server.h"
 #include "ios/web/public/test/http_server_util.h"
 #import "ios/web/public/test/web_view_interaction_test_util.h"
 #import "ios/web/public/web_state/web_state.h"
 #import "ios/web/test/web_int_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 #include "url/url_canon.h"
 
+using base::ASCIIToUTF16;
+
 namespace {
 
 // URL for the test window.location test file.  The page at this URL contains
 // several buttons that trigger window.location commands.  The page supports
 // several JavaScript functions:
 // - updateUrlToLoadText(), which takes a URL and updates a div on the page to
 //   contain that text.  This URL is used as the parameter for window.location
 //   function calls triggered by button taps.
 // - getUrl(), which returns the URL that was set via updateUrlToLoadText().
 // - isOnLoadTextVisible(), which returns whether a placeholder string is
@@ skipping 169 matching lines @@
   url::Replacements<char> port_replacement;
   port_replacement.SetPort(new_port_string.c_str(),
                            url::Component(0, new_port_string.length()));
   GURL different_origin_url =
       state_operations_url().ReplaceComponents(port_replacement);
   ASSERT_TRUE(IsOnLoadTextVisible());
   SetStateParams(empty_state, empty_title, different_origin_url);
   ASSERT_TRUE(web::test::TapWebViewElementWithId(web_state(), kReplaceStateId));
   WaitForNoOpText();
 }
+
+// Tests that calling window.history.replaceState() with only a new title
+// successfully replaces the current NavigationItem's title.
+// TODO(crbug.com/677356): Enable this test once the NavigationItem's title is
+// updated from within the web layer.
+TEST_F(HistoryStateOperationsTest, DISABLED_TitleReplacement) {
+  // Navigate to about:blank then navigate back to the test page.  The created
+  // NavigationItem can be used later to verify that the title is replaced
+  // rather than pushed.
+  GURL about_blank("about:blank");
+  LoadUrl(about_blank);
+  web::NavigationItem* about_blank_item = GetLastCommittedItem();
+  ExecuteBlockAndWaitForLoad(state_operations_url(), ^{
+    navigation_manager()->GoBack();
+  });
+  EXPECT_EQ(state_operations_url(), GetLastCommittedItem()->GetURL());
+  // Set up the state parameters and tap the replace state button.
+  std::string empty_state;
+  std::string new_title("NEW TITLE");
+  GURL empty_url;
+  SetStateParams(empty_state, new_title, empty_url);
+  ASSERT_TRUE(web::test::TapWebViewElementWithId(web_state(), kReplaceStateId));
+  // Wait for the title to be reflected in the NavigationItem.
+  base::test::ios::WaitUntilCondition(^bool {
+    return GetLastCommittedItem()->GetTitle() == ASCIIToUTF16(new_title);
+  });
+  // Verify that the forward navigation was not pruned.
+  EXPECT_EQ(GetIndexOfNavigationItem(GetLastCommittedItem()) + 1,
+            GetIndexOfNavigationItem(about_blank_item));
+}