Added a test for success after one backoff

components/safe_browsing_db/v4_update_protocol_manager_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 <vector>
 
 #include "base/base64.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/stringprintf.h"
 #include "base/test/test_simple_task_runner.h"
@@ skipping 16 matching lines @@
 const char kClient[] = "unittest";
 const char kAppVer[] = "1.0";
 const char kKeyParam[] = "test_key_param";
 
 }  // namespace
 
 namespace safe_browsing {
 
 class V4UpdateProtocolManagerTest : public testing::Test {
  protected:
-  static void ValidateGetUpdatesResults(
+  void ValidateGetUpdatesResults(
       const std::vector<ListUpdateResponse>& expected_lurs,
       const std::vector<ListUpdateResponse>& list_update_responses) {
+    // The callback should never be called if expect_callback_to_be_called_ is
+    // false.
+    EXPECT_TRUE(expect_callback_to_be_called_);
     ASSERT_EQ(expected_lurs.size(), list_update_responses.size());
 
     for (unsigned int i = 0; i < list_update_responses.size(); ++i) {
       const ListUpdateResponse& expected = expected_lurs[i];
       const ListUpdateResponse& actual = list_update_responses[i];
 
       EXPECT_EQ(expected.platform_type(), actual.platform_type());
       EXPECT_EQ(expected.response_type(), actual.response_type());
       EXPECT_EQ(expected.threat_entry_type(), actual.threat_entry_type());
       EXPECT_EQ(expected.threat_type(), actual.threat_type());
       EXPECT_EQ(expected.new_client_state(), actual.new_client_state());
 
       // TODO(vakh): Test more fields from the proto.
     }
   }
 
   scoped_ptr<V4UpdateProtocolManager> CreateProtocolManager(
       const base::hash_map<UpdateListIdentifier, std::string>
           current_list_states,
       const std::vector<ListUpdateResponse>& expected_lurs) {
     V4ProtocolConfig config;
     config.client_name = kClient;
     config.version = kAppVer;
     config.key_param = kKeyParam;
     config.disable_auto_update = false;
     return V4UpdateProtocolManager::Create(
         NULL, config, current_list_states,
-        base::Bind(ValidateGetUpdatesResults, expected_lurs));
+        base::Bind(&V4UpdateProtocolManagerTest::ValidateGetUpdatesResults,
+                   base::Unretained(this), expected_lurs));
   }
 
   void SetupCurrentListStates(
       base::hash_map<UpdateListIdentifier, std::string>* current_list_states) {
     UpdateListIdentifier list_identifier;
     list_identifier.platform_type = WINDOWS_PLATFORM;
     list_identifier.threat_entry_type = URL_EXPRESSION;
     list_identifier.threat_type = MALWARE_THREAT;
     current_list_states->insert({list_identifier, "initial_state_1"});
 
@@ skipping 45 matching lines @@
       lur->set_threat_entry_type(expected_lur.threat_entry_type());
       lur->set_threat_type(expected_lur.threat_type());
     }
 
     // Serialize.
     std::string res_data;
     response.SerializeToString(&res_data);
 
     return res_data;
   }
+
+  bool expect_callback_to_be_called_;
 };
 
 // TODO(vakh): Add many more tests.
 TEST_F(V4UpdateProtocolManagerTest, TestGetUpdatesErrorHandlingNetwork) {
   scoped_refptr<base::TestSimpleTaskRunner> runner(
       new base::TestSimpleTaskRunner());
   base::ThreadTaskRunnerHandle runner_handler(runner);
   net::TestURLFetcherFactory factory;
   const base::hash_map<UpdateListIdentifier, std::string> current_list_states;
   const std::vector<ListUpdateResponse> expected_lurs;
   scoped_ptr<V4UpdateProtocolManager> pm(
       CreateProtocolManager(current_list_states, expected_lurs));
   runner->ClearPendingTasks();
 
   // Initial state. No errors.
   EXPECT_EQ(0ul, pm->update_error_count_);
   EXPECT_EQ(1ul, pm->update_back_off_mult_);
+  expect_callback_to_be_called_ = false;
+  pm->IssueUpdateRequest();
 
-  pm->IssueUpdateRequest();
   EXPECT_FALSE(pm->IsUpdateScheduled());
 
   runner->RunPendingTasks();
 
   net::TestURLFetcher* fetcher = factory.GetFetcherByID(0);
   DCHECK(fetcher);
   // Failed request status should result in error.
   fetcher->set_status(net::URLRequestStatus(net::URLRequestStatus::FAILED,
                                             net::ERR_CONNECTION_RESET));
   fetcher->delegate()->OnURLFetchComplete(fetcher);
 
   // Should have recorded one error, but back off multiplier is unchanged.
   EXPECT_EQ(1ul, pm->update_error_count_);
   EXPECT_EQ(1ul, pm->update_back_off_mult_);
   EXPECT_TRUE(pm->IsUpdateScheduled());
 }
 
 TEST_F(V4UpdateProtocolManagerTest, TestGetUpdatesErrorHandlingResponseCode) {
   scoped_refptr<base::TestSimpleTaskRunner> runner(
       new base::TestSimpleTaskRunner());
   base::ThreadTaskRunnerHandle runner_handler(runner);
   net::TestURLFetcherFactory factory;
   const std::vector<ListUpdateResponse> expected_lurs;
   const base::hash_map<UpdateListIdentifier, std::string> current_list_states;
   scoped_ptr<V4UpdateProtocolManager> pm(
       CreateProtocolManager(current_list_states, expected_lurs));
   runner->ClearPendingTasks();
 
+  // Initial state. No errors.
+  EXPECT_EQ(0ul, pm->update_error_count_);
+  EXPECT_EQ(1ul, pm->update_back_off_mult_);
+  expect_callback_to_be_called_ = false;
   pm->IssueUpdateRequest();
+
   EXPECT_FALSE(pm->IsUpdateScheduled());
 
   runner->RunPendingTasks();
 
   net::TestURLFetcher* fetcher = factory.GetFetcherByID(0);
   DCHECK(fetcher);
   fetcher->set_status(net::URLRequestStatus());
   // Response code of anything other than 200 should result in error.
   fetcher->set_response_code(net::HTTP_NO_CONTENT);
   fetcher->SetResponseString("");
@@ skipping 11 matching lines @@
   base::ThreadTaskRunnerHandle runner_handler(runner);
   net::TestURLFetcherFactory factory;
   std::vector<ListUpdateResponse> expected_lurs;
   SetupExpectedListUpdateResponse(&expected_lurs);
   base::hash_map<UpdateListIdentifier, std::string> current_list_states;
   SetupCurrentListStates(&current_list_states);
   scoped_ptr<V4UpdateProtocolManager> pm(
       CreateProtocolManager(current_list_states, expected_lurs));
   runner->ClearPendingTasks();
 
+  // Initial state. No errors.
+  EXPECT_EQ(0ul, pm->update_error_count_);
+  EXPECT_EQ(1ul, pm->update_back_off_mult_);
+  expect_callback_to_be_called_ = true;
   pm->IssueUpdateRequest();
+
   EXPECT_FALSE(pm->IsUpdateScheduled());
 
   runner->RunPendingTasks();
 
   net::TestURLFetcher* fetcher = factory.GetFetcherByID(0);
   DCHECK(fetcher);
   fetcher->set_status(net::URLRequestStatus());
   fetcher->set_response_code(net::HTTP_OK);
   fetcher->SetResponseString(GetExpectedV4UpdateResponse(expected_lurs));
   fetcher->delegate()->OnURLFetchComplete(fetcher);
 
   // No error, back off multiplier is unchanged.
   EXPECT_EQ(0ul, pm->update_error_count_);
   EXPECT_EQ(1ul, pm->update_back_off_mult_);
   EXPECT_TRUE(pm->IsUpdateScheduled());
 }
 
+TEST_F(V4UpdateProtocolManagerTest, TestGetUpdatesWithOneBackoff) {
+  scoped_refptr<base::TestSimpleTaskRunner> runner(
+      new base::TestSimpleTaskRunner());
+  base::ThreadTaskRunnerHandle runner_handler(runner);
+  net::TestURLFetcherFactory factory;
+  std::vector<ListUpdateResponse> expected_lurs;
+  SetupExpectedListUpdateResponse(&expected_lurs);
+  base::hash_map<UpdateListIdentifier, std::string> current_list_states;
+  SetupCurrentListStates(&current_list_states);
+  scoped_ptr<V4UpdateProtocolManager> pm(
+      CreateProtocolManager(current_list_states, expected_lurs));
+  runner->ClearPendingTasks();
+
+  // Initial state. No errors.
+  EXPECT_EQ(0ul, pm->update_error_count_);
+  EXPECT_EQ(1ul, pm->update_back_off_mult_);
+  expect_callback_to_be_called_ = false;
+  pm->IssueUpdateRequest();
+
+  EXPECT_FALSE(pm->IsUpdateScheduled());
+
+  runner->RunPendingTasks();
+
+  net::TestURLFetcher* fetcher = factory.GetFetcherByID(0);
+  DCHECK(fetcher);
+  fetcher->set_status(net::URLRequestStatus());
+  // Response code of anything other than 200 should result in error.
+  fetcher->set_response_code(net::HTTP_NO_CONTENT);
+  fetcher->SetResponseString("");
+  fetcher->delegate()->OnURLFetchComplete(fetcher);
+
+  // Should have recorded one error, but back off multiplier is unchanged.
+  EXPECT_EQ(1ul, pm->update_error_count_);
+  EXPECT_EQ(1ul, pm->update_back_off_mult_);
+  EXPECT_TRUE(pm->IsUpdateScheduled());
+
+  // Retry, now no backoff.
+  expect_callback_to_be_called_ = true;
+  runner->RunPendingTasks();
+
+  fetcher = factory.GetFetcherByID(1);
+  DCHECK(fetcher);
+  fetcher->set_status(net::URLRequestStatus());
+  fetcher->set_response_code(net::HTTP_OK);
+  fetcher->SetResponseString(GetExpectedV4UpdateResponse(expected_lurs));
+  fetcher->delegate()->OnURLFetchComplete(fetcher);
+
+  // No error, back off multiplier is unchanged.
+  EXPECT_EQ(0ul, pm->update_error_count_);
+  EXPECT_EQ(1ul, pm->update_back_off_mult_);
+  EXPECT_TRUE(pm->IsUpdateScheduled());
+}
+
 }  // namespace safe_browsing