PlzNavigate: identify same-page browser-initiated navigation.

content/browser/frame_host/navigation_handle_impl_browsertest.cc

 // 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 "content/browser/frame_host/navigation_handle_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/request_context_type.h"
 #include "content/public/test/browser_test_utils.h"
@@ skipping 886 matching lines @@
 // Tests that the start URL is HTTPS upgraded for a cross site navigation.
 IN_PROC_BROWSER_TEST_F(NavigationHandleImplHttpsUpgradeBrowserTest,
                        StartUrlIsHttpsUpgradedCrossSite) {
   GURL start_url(
       embedded_test_server()->GetURL("/https_upgrade_cross_site.html"));
   GURL cross_site_iframe_secure_url("https://other.com/title1.html");
 
   CheckHttpsUpgradedIframeNavigation(start_url, cross_site_iframe_secure_url);
 }
 
+// Ensure that browser-initiated same-document navigations are detected and
+// don't issue network requests.
+// See crbug.com/663777.

[nasko, 2017/01/13 02:51:10]

nit: Combine on previous line.

+IN_PROC_BROWSER_TEST_F(NavigationHandleImplBrowserTest,
+                       SamePageBrowserInitiatedNoReload) {
+  GURL url(embedded_test_server()->GetURL("/title1.html"));
+  GURL url_fragment_1(embedded_test_server()->GetURL("/title1.html#id_1"));
+  GURL url_fragment_2(embedded_test_server()->GetURL("/title1.html#id_2"));
+
+  // 1) Perform a new-document navigation.
+  {
+    TestNavigationThrottleInstaller installer(
+        shell()->web_contents(), NavigationThrottle::PROCEED,
+        NavigationThrottle::PROCEED, NavigationThrottle::PROCEED);
+    NavigationHandleObserver observer(shell()->web_contents(), url);
+    EXPECT_TRUE(NavigateToURL(shell(), url));
+    EXPECT_EQ(1, installer.will_start_called());
+    EXPECT_EQ(1, installer.will_process_called());
+    EXPECT_FALSE(observer.is_same_page());
+  }
+
+  // 2) Perform a same-document navigation by adding a fragment.
+  {
+    TestNavigationThrottleInstaller installer(
+        shell()->web_contents(), NavigationThrottle::PROCEED,
+        NavigationThrottle::PROCEED, NavigationThrottle::PROCEED);
+    NavigationHandleObserver observer(shell()->web_contents(), url_fragment_1);
+    EXPECT_TRUE(NavigateToURL(shell(), url_fragment_1));
+    EXPECT_EQ(0, installer.will_start_called());
+    EXPECT_EQ(0, installer.will_process_called());
+    EXPECT_TRUE(observer.is_same_page());
+  }
+
+  // 3) Perform a same-document navigation by modifying the fragment.
+  {
+    TestNavigationThrottleInstaller installer(
+        shell()->web_contents(), NavigationThrottle::PROCEED,
+        NavigationThrottle::PROCEED, NavigationThrottle::PROCEED);
+    NavigationHandleObserver observer(shell()->web_contents(), url_fragment_2);
+    EXPECT_TRUE(NavigateToURL(shell(), url_fragment_2));
+    EXPECT_EQ(0, installer.will_start_called());
+    EXPECT_EQ(0, installer.will_process_called());
+    EXPECT_TRUE(observer.is_same_page());
+  }
+
+  // 4) Redo the last navigation, but this time it should trigger a reload.
+  {
+    TestNavigationThrottleInstaller installer(
+        shell()->web_contents(), NavigationThrottle::PROCEED,
+        NavigationThrottle::PROCEED, NavigationThrottle::PROCEED);
+    NavigationHandleObserver observer(shell()->web_contents(), url_fragment_2);
+    EXPECT_TRUE(NavigateToURL(shell(), url_fragment_2));
+    EXPECT_EQ(1, installer.will_start_called());
+    EXPECT_EQ(1, installer.will_process_called());
+    EXPECT_FALSE(observer.is_same_page());
+  }
+
+  // 5) Perform a new-document navigation by removing the fragment.
+  {
+    TestNavigationThrottleInstaller installer(
+        shell()->web_contents(), NavigationThrottle::PROCEED,
+        NavigationThrottle::PROCEED, NavigationThrottle::PROCEED);
+    NavigationHandleObserver observer(shell()->web_contents(), url);
+    EXPECT_TRUE(NavigateToURL(shell(), url));
+    EXPECT_EQ(1, installer.will_start_called());
+    EXPECT_EQ(1, installer.will_process_called());
+    EXPECT_FALSE(observer.is_same_page());
+  }
+}
+
 }  // namespace content