public async Task ElasticSearchNotiferShouldDeleteMessage()
        {
            //Arrange
            var eventStore = new EventStore(Guid.NewGuid(),
                                            It.IsAny <long>(), It.IsAny <string>(), "type", DateTime.Now, "body");
            var message = new NotificationMessage <string> {
                Message = "notifyText"
            };

            var @event = new SpeechDeletedEvent(Guid.NewGuid(), true);
            var mockEventSerializer = new Mock <IEventSerializer>();

            mockEventSerializer.Setup(m => m.Deserialize <Event>(It.IsAny <string>(), It.IsAny <string>())).Returns(@event);

            var mockJsonSerializer = new Mock <IJsonSerializer>();

            mockJsonSerializer.Setup(m => m.Deserialize <EventStore>(It.IsAny <string>()))
            .Returns(eventStore);

            var mockElasticSearchClient = new Mock <IElasticSearchClient <SpeechProjection> >();

            mockElasticSearchClient.Setup(m => m.DeleteAsync(It.IsAny <SpeechProjection>())).Verifiable();

            var mockSignalRPublisher = new Mock <ISignalRPublisher>();

            mockSignalRPublisher.Setup(m => m.PublishAsync(It.IsAny <string>(), It.IsAny <SpeechProjection>())).Verifiable();

            //Act
            INotificationHandler <NotificationMessage <string> > elasticSearchNotifer = new ElasticSearchNotifer(mockEventSerializer.Object, mockJsonSerializer.Object, mockElasticSearchClient.Object, mockSignalRPublisher.Object);
            await elasticSearchNotifer.Handle(message, CancellationToken.None);

            //Assert
            mockElasticSearchClient.Verify(m => m.DeleteAsync(It.IsAny <SpeechProjection>()), Times.Once);
            mockSignalRPublisher.Verify(m => m.PublishAsync(It.IsAny <string>(), It.IsAny <SpeechProjection>()), Times.Once);
        }
        public async Task ElasticSearchNotiferWithNullMessageShouldRaiseArgumentNullException()
        {
            //Arrange
            var mockEventSerializer = new Mock <IEventSerializer>();

            var mockJsonSerializer = new Mock <IJsonSerializer>();

            var mockElasticSearchClient = new Mock <IElasticSearchClient <SpeechProjection> >();

            var mockSignalRPublisher = new Mock <ISignalRPublisher>();

            //Act
            //Assert
            INotificationHandler <NotificationMessage <string> > elasticSearchNotifer = new ElasticSearchNotifer(mockEventSerializer.Object, mockJsonSerializer.Object, mockElasticSearchClient.Object, mockSignalRPublisher.Object);
            await Assert.ThrowsAsync <ArgumentNullException>(() => elasticSearchNotifer.Handle(null, CancellationToken.None));
        }