Moq.Mock.Verify()

[Fact]
        public async Task NotifyAsync_HandlesNonemptyObjectData()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", new { d1 = "v1" });

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1" && (string)n.Single()["d1"] == "v1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public async Task NotifyAllAsync_HandlesEmptyDictionaryData()
        {
            // Act
            await _controller.NotifyAllAsync("a1", new Dictionary<string, object>());

            // replacedert
            _managerMock.Verify(m => m.NotifyAllAsync(It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesNullData()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", data: null);

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesNonemptyDictionaryData()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", new Dictionary<string, object>() { { "d1", "v1" } });

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1" && (string)n.Single()["d1"] == "v1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesEmptyDictionaryData()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", new Dictionary<string, object>());

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public void GetManager_ReturnsDependencyInstance_IfRegistered()
        {
            // Arrange
            Mock<IWebHookManager> instanceMock = new Mock<IWebHookManager>();
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookManager)))
                .Returns(instanceMock.Object)
                .Verifiable();

            // Act
            IWebHookManager actual = _resolverMock.Object.GetManager();

            // replacedert
            replacedert.Same(instanceMock.Object, actual);
            instanceMock.Verify();
        }

[Fact]
        public async Task NotifyAllAsync_HandlesNullData()
        {
            // Act
            await _controller.NotifyAllAsync("a1", data: null);

            // replacedert
            _managerMock.Verify(m => m.NotifyAllAsync(It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public void GetRegistrars_ReturnsDependencyInstances_IfRegistered()
        {
            // Arrange
            Mock<IWebHookRegistrar> instanceMock = new Mock<IWebHookRegistrar>();
            List<IWebHookRegistrar> instances = new List<IWebHookRegistrar> { instanceMock.Object };
            _resolverMock.Setup(r => r.GetServices(typeof(IWebHookRegistrar)))
                .Returns(instances)
                .Verifiable();

            // Act
            IEnumerable<IWebHookRegistrar> actual = _resolverMock.Object.GetRegistrars();

            // replacedert
            replacedert.Same(instances, actual);
            instanceMock.Verify();
        }

[Fact]
        public async Task NotifyAllAsync_HandlesEmptyDictionaryDataAndNoPredicate()
        {
            // Act
            await _controller.NotifyAllAsync("a1", new Dictionary<string, object>());

            // replacedert
            _managerMock.Verify(m => m.NotifyAllAsync(It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Theory]
        [MemberData(nameof(SenderData))]
        public async Task QueuedSender_Deletes_AllCompletedResponses(int[] statusCodes)
        {
            // Arrange
            _handlerMock.Handler = (req, index) =>
            {
                if (statusCodes[index] < 0)
                {
                    throw new Exception("Catch this!");
                }
                var response = req.CreateResponse((HttpStatusCode)statusCodes[index]);
                return Task.FromResult(response);
            };
            var client = new HttpClient(_handlerMock);
            _dequeueManager = new AzureWebHookDequeueManagerMock(this, storageManager: _storageMock.Object, httpClient: client);
            var workItems = StorageManagerMock.CreateWorkItems(statusCodes.Length);

            // Act
            await _dequeueManager.WebHookSender.SendWebHookWorkItemsAsync(workItems);

            // replacedert
            _storageMock.Verify(s => s.DeleteMessagesAsync(StorageManagerMock.CloudQueue, It.Is<IEnumerable<CloudQueueMessage>>(m => m.Count() == statusCodes.Length)), Times.Once());
        }

[Fact]
        public async Task NotifyAsync_HandlesEmptyObjectDataAndNoPredicate()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", new object(), predicate: null);

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesEmptyDictionaryDataAndNoPredicate()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", new Dictionary<string, object>());

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public void GetFilterManager_ReturnsDependencyInstance_IfRegistered()
        {
            // Arrange
            Mock<IWebHookFilterManager> instanceMock = new Mock<IWebHookFilterManager>();
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookFilterManager)))
                .Returns(instanceMock.Object)
                .Verifiable();

            // Act
            IWebHookFilterManager actual = _resolverMock.Object.GetFilterManager();

            // replacedert
            replacedert.Same(instanceMock.Object, actual);
            instanceMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesNonemptyDictionaryDataAndPredicate()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();
            Func<WebHook, string, bool> predicate = (w, s) => true;

            // Act
            await _controller.NotifyAsync("a1", new Dictionary<string, object>() { { "d1", "v1" } }, predicate);

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1" && (string)n.Single()["d1"] == "v1"), predicate));
            _resolverMock.Verify();
        }

[Fact]
        public async Task AddPrivateFilters_Calls_RegistrarWithFilter()
        {
            // Arrange
            var webHook = new WebHook();
            webHook.Filters.Add(FilterName);
            _registrarMock.Setup(r => r.RegisterAsync(_controllerContext.Request, webHook))
                .Returns(Task.FromResult(true))
                .Verifiable();

            // Act
            await _controller.AddPrivateFilters("12345", webHook);

            // replacedert
            _registrarMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesNonemptyObjectDataAndPredicate()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();
            Func<WebHook, string, bool> predicate = (w, s) => true;

            // Act
            await _controller.NotifyAsync("a1", new { d1 = "v1" }, predicate);

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1" && (string)n.Single()["d1"] == "v1"), predicate));
            _resolverMock.Verify();
        }

[Fact]
        public void GetUser_ReturnsDependencyInstance_IfRegistered()
        {
            // Arrange
            Mock<IWebHookUser> instanceMock = new Mock<IWebHookUser>();
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(instanceMock.Object)
                .Verifiable();

            // Act
            IWebHookUser actual = _resolverMock.Object.GetUser();

            // replacedert
            replacedert.Same(instanceMock.Object, actual);
            instanceMock.Verify();
        }

[Fact]
        public async Task NotifyAllAsync_HandlesNullDataAndNullPredicate()
        {
            // Act
            await _controller.NotifyAllAsync("a1", data: null, predicate: null);

            // replacedert
            _managerMock.Verify(m => m.NotifyAllAsync(It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public void GetService_ReturnsService()
        {
            _resolverMock.Setup<object>(r => r.GetService(typeof(Service)))
                .Returns(_service1)
                .Verifiable();

            Service actual = _resolver.GetService<Service>();

            _resolverMock.Verify();
            replacedert.Same(_service1, actual);
        }

[Fact]
        public async Task NotifyAllAsync_HandlesEmptyDictionaryDataAndNoPredicate()
        {
            // Act
            await _controller.NotifyAllAsync("a1", new Dictionary<string, object>());

            // replacedert
            _managerMock.Verify(m => m.NotifyAllAsync(It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesNullDataAndNullPredicate()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", data: null, predicate: null);

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesNullDataAndNullPredicate()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", data: null, predicate: null);

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public async Task Get_Returns_WebHooks()
        {
            // Arrange
            IEnumerable<WebHook> hooks = CreateWebHooks();
            _regsMock.Setup(r => r.GetWebHooksAsync(_principal, It.IsAny<Func<string, WebHook, Task>>()))
                .ReturnsAsync(hooks)
                .Verifiable();

            // Act
            var actual = await _controller.Get();

            // replacedert
            _regsMock.Verify();
            replacedert.Equal(WebHookCount, actual.Count());
        }

[Fact]
        public async Task NotifyAsync_HandlesEmptyDictionaryData()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", new Dictionary<string, object>());

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Theory]
        [MemberData(nameof(SenderData))]
        public async Task QueuedSender_Deletes_SuccessAndGoneResponses(int[] statusCodes)
        {
            // Arrange
            _handlerMock.Handler = (req, index) =>
            {
                if (statusCodes[index] < 0)
                {
                    throw new Exception("Catch this!");
                }
                var response = req.CreateResponse((HttpStatusCode)statusCodes[index]);
                return Task.FromResult(response);
            };
            var client = new HttpClient(_handlerMock);
            _dequeueManager = new AzureWebHookDequeueManagerMock(this, maxAttempts: 1, storageManager: _storageMock.Object, httpClient: client);
            var workItems = StorageManagerMock.CreateWorkItems(statusCodes.Length);

            // Act
            await _dequeueManager.WebHookSender.SendWebHookWorkItemsAsync(workItems);

            // replacedert
            var expected = statusCodes.Where(i => (i >= 200 && i <= 299) || i == 410).Count();
            _storageMock.Verify(s => s.DeleteMessagesAsync(StorageManagerMock.CloudQueue, It.Is<IEnumerable<CloudQueueMessage>>(m => m.Count() == expected)), Times.Once());
        }

[Fact]
        public async Task NotifyAsync_HandlesEmptyObjectData()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", new object());

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesEmptyDictionaryDataAndNoPredicate()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", new Dictionary<string, object>());

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public async Task SendWebHookWorkItems_SendsMessages()
        {
            // Arrange
            IEnumerable<WebHookWorkItem> workItems = StorageManagerMock.CreateWorkItems(32);

            // Act
            await _sender.SendWebHookWorkItemsAsync(workItems);

            // replacedert
            _storageMock.Verify(s => s.AddMessagesAsync(StorageManagerMock.CloudQueue, It.Is<IEnumerable<CloudQueueMessage>>(m => m.Count() == 32)));
            _storageMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesEmptyObjectDataAndNoPredicate()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", new object(), predicate: null);

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public async Task AddPrivateFilters_Calls_RegistrarWithNoFilter()
        {
            // Arrange
            var webHook = new WebHook();
            _registrarMock.Setup(r => r.RegisterAsync(_controllerContext.Request, webHook))
                .Returns(Task.FromResult(true))
                .Verifiable();

            // Act
            await _controller.AddPrivateFilters("12345", webHook);

            // replacedert
            _registrarMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesNonemptyDictionaryData()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", new Dictionary<string, object>() { { "d1", "v1" } });

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1" && (string)n.Single()["d1"] == "v1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public void GetSender_ReturnsDependencyInstance_IfRegistered()
        {
            // Arrange
            Mock<IWebHookSender> instanceMock = new Mock<IWebHookSender>();
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookSender)))
                .Returns(instanceMock.Object)
                .Verifiable();

            // Act
            IWebHookSender actual = _resolverMock.Object.GetSender();

            // replacedert
            replacedert.Same(instanceMock.Object, actual);
            instanceMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesNonemptyDictionaryDataAndPredicate()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();
            Func<WebHook, string, bool> predicate = (w, s) => true;

            // Act
            await _controller.NotifyAsync("a1", new Dictionary<string, object>() { { "d1", "v1" } }, predicate);

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1" && (string)n.Single()["d1"] == "v1"), predicate));
            _resolverMock.Verify();
        }

[Fact]
        public void GetSettings_ReturnsDefaultInstance_IfEmptyDictionaryRegistered()
        {
            // Arrange
            SettingsDictionary instance = new SettingsDictionary();
            instance.Clear();
            _resolverMock.Setup(r => r.GetService(typeof(SettingsDictionary)))
                .Returns(instance)
                .Verifiable();

            // Act
            SettingsDictionary actual = _resolverMock.Object.GetSettings();

            // replacedert
            replacedert.NotSame(instance, actual);
            _resolverMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesNonemptyObjectData()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", new { d1 = "v1" });

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1" && (string)n.Single()["d1"] == "v1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public void GetStore_ReturnsDependencyInstance_IfRegistered()
        {
            // Arrange
            Mock<IWebHookStore> instanceMock = new Mock<IWebHookStore>();
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookStore)))
                .Returns(instanceMock.Object)
                .Verifiable();

            // Act
            IWebHookStore actual = _resolverMock.Object.GetStore();

            // replacedert
            replacedert.Same(instanceMock.Object, actual);
            instanceMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesNonemptyObjectDataAndPredicate()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();
            Func<WebHook, string, bool> predicate = (w, s) => true;

            // Act
            await _controller.NotifyAsync("a1", new { d1 = "v1" }, predicate);

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1" && (string)n.Single()["d1"] == "v1"), predicate));
            _resolverMock.Verify();
        }

[Fact]
        public void GetIdValidator_ReturnsDependencyInstance_IfRegistered()
        {
            // Arrange
            Mock<IWebHookIdValidator> instanceMock = new Mock<IWebHookIdValidator>();
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookIdValidator)))
                .Returns(instanceMock.Object)
                .Verifiable();

            // Act
            IWebHookIdValidator actual = _resolverMock.Object.GetIdValidator();

            // replacedert
            replacedert.Same(instanceMock.Object, actual);
            instanceMock.Verify();
        }

[Fact]
        public async Task NotifyAllAsync_HandlesNullData()
        {
            // Act
            await _controller.NotifyAllAsync("a1", data: null);

            // replacedert
            _managerMock.Verify(m => m.NotifyAllAsync(It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public void GetFilterProviders_ReturnsDependencyInstances_IfRegistered()
        {
            // Arrange
            Mock<IWebHookFilterProvider> instanceMock = new Mock<IWebHookFilterProvider>();
            List<IWebHookFilterProvider> instances = new List<IWebHookFilterProvider> { instanceMock.Object };
            _resolverMock.Setup(r => r.GetServices(typeof(IWebHookFilterProvider)))
                .Returns(instances)
                .Verifiable();

            // Act
            IEnumerable<IWebHookFilterProvider> actual = _resolverMock.Object.GetFilterProviders();

            // replacedert
            replacedert.Same(instances, actual);
            instanceMock.Verify();
        }

[Fact]
        public async Task NotifyAllAsync_HandlesNullDataAndNullPredicate()
        {
            // Act
            await _controller.NotifyAllAsync("a1", data: null, predicate: null);

            // replacedert
            _managerMock.Verify(m => m.NotifyAllAsync(It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public void GetLogger_ReturnsDependencyInstance_IfRegistered()
        {
            // Arrange
            Mock<ILogger> instanceMock = new Mock<ILogger>();
            _resolverMock.Setup(r => r.GetService(typeof(ILogger)))
                .Returns(instanceMock.Object)
                .Verifiable();

            // Act
            ILogger actual = _resolverMock.Object.GetLogger();

            // replacedert
            replacedert.Same(instanceMock.Object, actual);
            instanceMock.Verify();
        }

[Fact]
        public async Task NotifyAllAsync_HandlesEmptyDictionaryData()
        {
            // Act
            await _controller.NotifyAllAsync("a1", new Dictionary<string, object>());

            // replacedert
            _managerMock.Verify(m => m.NotifyAllAsync(It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesNullData()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", data: null);

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }

[Theory]
        [MemberData(nameof(DequeueData))]
        public async Task DequeueAndSendWebHooks_GetsMessagesAndSubmitsToSender(int[] data)
        {
            // Arrange
            var index = 0;
            _storageMock.Setup(s => s.GetMessagesAsync(StorageManagerMock.CloudQueue, AzureWebHookDequeueManager.MaxDequeuedMessages, _messageTimeout))
                .Returns(() =>
                {
                    var count = index > data.Length ? 0 : data[index++];
                    if (count < 0)
                    {
                        throw new Exception("Catch this!");
                    }
                    var result = StorageManagerMock.CreateQueueMessages(count);
                    return Task.FromResult(result);
                })
                .Callback(() =>
                {
                    if (index > data.Length)
                    {
                        _tokenSource.Cancel();
                    }
                })
                .Verifiable();
            _dequeueManager = new AzureWebHookDequeueManagerMock(this, storageManager: _storageMock.Object, sender: _senderMock.Object);

            // Act
            await _dequeueManager.DequeueAndSendWebHooks(_tokenSource.Token);

            // replacedert
            var expected = data.Where(i => i > 0).Count();
            _senderMock.Verify(s => s.SendWebHookWorkItemsAsync(It.IsAny<IEnumerable<WebHookWorkItem>>()), Times.Exactly(expected));
        }

[Fact]
        public void Test_SubscribedToEventAggregator()
        {
            _eventAggregator.Verify(x => x.Subscribe(_mainVM));
        }

[Fact]
        public void GetSettings_ReturnsDependencyInstance_IfRegistered()
        {
            // Arrange
            SettingsDictionary instance = new SettingsDictionary();
            instance["key"] = "value";
            _resolverMock.Setup(r => r.GetService(typeof(SettingsDictionary)))
                .Returns(instance)
                .Verifiable();

            // Act
            SettingsDictionary actual = _resolverMock.Object.GetSettings();

            // replacedert
            replacedert.Same(instance, actual);
            _resolverMock.Verify();
        }

[Fact]
        public async Task Get_Returns_EmptyList()
        {
            // Arrange
            _regsMock.Setup(r => r.GetWebHooksAsync(_principal, It.IsAny<Func<string, WebHook, Task>>()))
                .ReturnsAsync(new WebHook[0])
                .Verifiable();

            // Act
            var actual = await _controller.Get();

            // replacedert
            _regsMock.Verify();
            replacedert.Empty(actual);
        }

[Fact]
        public async Task SendWebHookWorkItems_SendsMessages()
        {
            // Arrange
            IEnumerable<WebHookWorkItem> workItems = StorageManagerMock.CreateWorkItems(32);

            // Act
            await _sender.SendWebHookWorkItemsAsync(workItems);

            // replacedert
            _storageMock.Verify(s => s.AddMessagesAsync(StorageManagerMock.CloudQueue, It.Is<IEnumerable<CloudQueueMessage>>(m => m.Count() == 32)));
            _storageMock.Verify();
        }

[Fact]
        public async Task NotifyAsync_HandlesEmptyObjectData()
        {
            // Arrange
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookUser)))
                .Returns(_user)
                .Verifiable();

            // Act
            await _controller.NotifyAsync("a1", new object());

            // replacedert
            _managerMock.Verify(m => m.NotifyAsync("TestUser", It.Is<IEnumerable<NotificationDictionary>>(n => n.Single().Action == "a1"), null));
            _resolverMock.Verify();
        }