Reload offline version on load failure

ios/web/web_state/ui/crw_web_controller_unittest.mm

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/web/web_state/ui/crw_web_controller.h"
 
 #import <WebKit/WebKit.h>
 
 #include <utility>
 
@@ skipping 871 matching lines @@
   EXPECT_EQ([web_controller() webState]->GetVisibleURL(), virtual_url);
   NavigationManagerImpl& navigationManager =
       [web_controller() webStateImpl]->GetNavigationManagerImpl();
   EXPECT_EQ(navigationManager.GetVisibleItem()->GetURL(), url_to_load);
   EXPECT_EQ(navigationManager.GetVisibleItem()->GetVirtualURL(), virtual_url);
   EXPECT_EQ(navigationManager.GetLastCommittedItem()->GetURL(), url_to_load);
   EXPECT_EQ(navigationManager.GetLastCommittedItem()->GetVirtualURL(),
             virtual_url);
 }
 
+// Tests WebState and NavigationManager correctly return native content URL.
+TEST_F(CRWWebControllerNativeContentTest, FallbackNativeContentURL) {
+  GURL url_to_load(kTestURLString);
+  GURL fallback_url(kTestAppSpecificURL);
+  base::scoped_nsobject<TestNativeContent> content([[TestNativeContent alloc]
+      initWithURL:fallback_url
+       virtualURL:url_to_load]);
+  [mock_native_provider_ setController:content forURL:fallback_url];
+  Load(url_to_load);
+  web::URLVerificationTrustLevel trust_level = web::kNone;
+  [web_controller() loadNativeContentFallback:fallback_url];
+  GURL gurl = [web_controller() currentURLWithTrustLevel:&trust_level];
+  EXPECT_EQ(web::kAbsolute, trust_level);
+  EXPECT_EQ([web_controller() webState]->GetVisibleURL(), url_to_load);
+  NavigationManagerImpl& navigationManager =
+      [web_controller() webStateImpl]->GetNavigationManagerImpl();
+  EXPECT_EQ(navigationManager.GetVisibleItem()->GetURL(), url_to_load);
+  EXPECT_EQ(navigationManager.GetVisibleItem()->GetVirtualURL(), url_to_load);
+  EXPECT_EQ(navigationManager.GetLastCommittedItem()->GetURL(), url_to_load);
+  EXPECT_EQ(navigationManager.GetLastCommittedItem()->GetVirtualURL(),
+            url_to_load);
+}
+
 // A separate test class, as none of the |CRWUIWebViewWebControllerTest| setup
 // is needed;
 typedef web::WebTestWithWebController CRWWebControllerObserversTest;
 
 // Tests that CRWWebControllerObservers are called.
 TEST_F(CRWWebControllerObserversTest, Observers) {
   base::scoped_nsobject<CountingObserver> observer(
       [[CountingObserver alloc] init]);
   EXPECT_EQ(0u, [web_controller() observerCount]);
   [web_controller() addObserver:observer];
@@ skipping 171 matching lines @@
 
   [web_controller() setDelegate:delegate];
   web::SimulateWKWebViewCrash(webView_);
 
   EXPECT_OCMOCK_VERIFY(delegate);
   EXPECT_FALSE([web_controller() isViewAlive]);
   [web_controller() setDelegate:nil];
 };
 
 }  // namespace