PrerenderingOffliner will abort background load if it sees chrome transitioning to foreground on lo…

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"
+#include "base/sys_info.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/android/offline_pages/prerendering_loader.h"
 #include "chrome/test/base/testing_profile.h"
 #include "components/offline_pages/background/offliner.h"
 #include "components/offline_pages/background/save_page_request.h"
 #include "components/offline_pages/stub_offline_page_model.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/public/test/web_contents_tester.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 300 matching lines @@
 
   loader()->CompleteLoadingAsCanceled();
   PumpLoop();
   EXPECT_TRUE(completion_callback_called());
   EXPECT_EQ(Offliner::RequestStatus::PRERENDERING_CANCELED, request_status());
   EXPECT_FALSE(loader()->IsLoaded());
   // Note: save still in progress since it does not support canceling.
   EXPECT_TRUE(SaveInProgress());
 }
 
+TEST_F(PrerenderingOfflinerTest, ForegroundTransitionCancelsOnLowEndDevice) {
+  offliner()->SetLowEndDeviceForTesting(true);
+
+  base::Time creation_time = base::Time::Now();
+  SavePageRequest request(kRequestId, kHttpUrl, kClientId, creation_time);
+  EXPECT_TRUE(offliner()->LoadAndSave(request, callback()));
+  EXPECT_FALSE(loader()->IsIdle());
+
+  offliner()->SetApplicationStateForTesting(
+      base::android::APPLICATION_STATE_HAS_RUNNING_ACTIVITIES);
+
+  // Loading canceled on low-end device.
+  EXPECT_TRUE(loader()->IsIdle());
+  EXPECT_EQ(Offliner::RequestStatus::FOREGROUND_CANCELED, request_status());
+}
+
+TEST_F(PrerenderingOfflinerTest, ForegroundTransitionIgnoredOnHighEndDevice) {
+  offliner()->SetLowEndDeviceForTesting(false);
+
+  base::Time creation_time = base::Time::Now();
+  SavePageRequest request(kRequestId, kHttpUrl, kClientId, creation_time);
+  EXPECT_TRUE(offliner()->LoadAndSave(request, callback()));
+  EXPECT_FALSE(loader()->IsIdle());
+
+  offliner()->SetApplicationStateForTesting(
+      base::android::APPLICATION_STATE_HAS_RUNNING_ACTIVITIES);
+
+  // Loader still loading since not low-end device.
+  EXPECT_FALSE(loader()->IsIdle());
+}
+
 }  // namespace offline_pages