[Offline pages]: Implement background loader to save on last retry, and record last retry success U…

chrome/browser/android/offline_pages/prerendering_offliner_unittest.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 "chrome/browser/android/offline_pages/prerendering_offliner.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/run_loop.h"
@@ skipping 454 matching lines @@
 
   base::Time creation_time = base::Time::Now();
   SavePageRequest request(kRequestId, kHttpUrl, kClientId, creation_time,
                           kUserRequested);
   request.set_completed_attempt_count(policy()->GetMaxCompletedTries() - 1);
   EXPECT_TRUE(offliner()->LoadAndSave(request, completion_callback(),
                                       progress_callback()));
   loader()->set_is_lowbar_met(true);
   EXPECT_TRUE(offliner()->HandleTimeout(request));
   EXPECT_TRUE(loader()->start_snapshot_called());
+  EXPECT_TRUE(SaveInProgress());
+  model()->CompleteSavingAsSuccess();
+  PumpLoop();
+  EXPECT_TRUE(completion_callback_called());
+  EXPECT_EQ(Offliner::RequestStatus::SAVED_ON_LAST_RETRY, request_status());
 }
 
 TEST_F(PrerenderingOfflinerTest,
        HandleTimeoutWithLowbarAndCompletedTriesMetLowEndDevice) {
   offliner()->SetLowEndDeviceForTesting(true);
 
   base::Time creation_time = base::Time::Now();
   SavePageRequest request(kRequestId, kHttpUrl, kClientId, creation_time,
                           kUserRequested);
   request.set_completed_attempt_count(policy()->GetMaxCompletedTries() - 1);
@@ skipping 93 matching lines @@
   PumpLoop();
   EXPECT_EQ(Offliner::RequestStatus::SAVED, request_status());
 
   // One extra part should be added if the flag is on.
   content::MHTMLExtraParts* extra_parts =
       content::MHTMLExtraParts::FromWebContents(loader()->web_contents());
   EXPECT_EQ(extra_parts->size(), 1);
 }
 
 }  // namespace offline_pages