Add an API to Pause and Resume background offlining requests.

components/offline_pages/background/request_queue_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 "components/offline_pages/background/request_queue.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/test/test_simple_task_runner.h"
@@ skipping 195 matching lines @@
   PumpLoop();
   ASSERT_EQ(2ul, last_remove_results().size());
   ASSERT_EQ(UpdateRequestResult::SUCCESS, last_remove_results().at(0).second);
   ASSERT_EQ(UpdateRequestResult::SUCCESS, last_remove_results().at(1).second);
   ASSERT_EQ(kRequestId, last_remove_results().at(0).first);
   ASSERT_EQ(kRequestId2, last_remove_results().at(1).first);
 
   queue()->GetRequests(
       base::Bind(&RequestQueueTest::GetRequestsDone, base::Unretained(this)));
   PumpLoop();
+
+  // Verify both requests are no longer in the queue.
+  ASSERT_EQ(GetRequestsResult::SUCCESS, last_get_requests_result());
+  ASSERT_EQ(0ul, last_requests().size());
+}
+
+TEST_F(RequestQueueTest, PauseAndResume) {
+  base::Time creation_time = base::Time::Now();
+  SavePageRequest request(kRequestId, kUrl, kClientId, creation_time,
+                          kUserRequested);
+  queue()->AddRequest(request, base::Bind(&RequestQueueTest::AddRequestDone,
+                                          base::Unretained(this)));
+  PumpLoop();
+  ASSERT_EQ(kRequestId, last_added_request()->request_id());
+
+  queue()->GetRequests(
+      base::Bind(&RequestQueueTest::GetRequestsDone, base::Unretained(this)));
+  PumpLoop();
   ASSERT_EQ(GetRequestsResult::SUCCESS, last_get_requests_result());
-  ASSERT_EQ(0ul, last_requests().size());
+  ASSERT_EQ(1ul, last_requests().size());
+
+  std::vector<int64_t> request_ids;
+  request_ids.push_back(kRequestId);
+
+  // Pause the request.
+  queue()->ChangeRequestsState(
+      request_ids, SavePageRequest::RequestState::PAUSED,
+      base::Bind(&RequestQueueTest::UpdateRequestDone, base::Unretained(this)));
+  PumpLoop();
+  ASSERT_EQ(UpdateRequestResult::SUCCESS, last_update_result());
+
+  queue()->GetRequests(
+      base::Bind(&RequestQueueTest::GetRequestsDone, base::Unretained(this)));
+  PumpLoop();
+
+  // Verify the request is paused.
+  ASSERT_EQ(GetRequestsResult::SUCCESS, last_get_requests_result());
+  ASSERT_EQ(1ul, last_requests().size());
+  ASSERT_EQ(SavePageRequest::RequestState::PAUSED,
+            last_requests().front().request_state());
+
+  // Resume the request.
+  queue()->ChangeRequestsState(
+      request_ids, SavePageRequest::RequestState::AVAILABLE,
+      base::Bind(&RequestQueueTest::UpdateRequestDone, base::Unretained(this)));
+  PumpLoop();
+  ASSERT_EQ(UpdateRequestResult::SUCCESS, last_update_result());
+
+  queue()->GetRequests(
+      base::Bind(&RequestQueueTest::GetRequestsDone, base::Unretained(this)));
+  PumpLoop();
+
+  // Verify the request is no longer paused.
+  ASSERT_EQ(GetRequestsResult::SUCCESS, last_get_requests_result());
+  ASSERT_EQ(1ul, last_requests().size());
+  ASSERT_EQ(SavePageRequest::RequestState::AVAILABLE,
+            last_requests().front().request_state());
 }
 
 // A longer test populating the request queue with more than one item, properly
 // listing multiple items and removing the right item.
 TEST_F(RequestQueueTest, MultipleRequestsAddGetRemove) {
   base::Time creation_time = base::Time::Now();
   SavePageRequest request1(
       kRequestId, kUrl, kClientId, creation_time, kUserRequested);
   queue()->AddRequest(request1, base::Bind(&RequestQueueTest::AddRequestDone,
                                            base::Unretained(this)));
@@ skipping 69 matching lines @@
 
   // Try to update request1 when only request2 is in the queue.
   queue()->UpdateRequest(
       request1,
       base::Bind(&RequestQueueTest::UpdateRequestDone, base::Unretained(this)));
   PumpLoop();
   ASSERT_EQ(UpdateRequestResult::REQUEST_DOES_NOT_EXIST, last_update_result());
 }
 
 }  // namespace offline_pages