public async Task CreateAsync_ViewerValidationSucceed_CreatesScreening()
            {
                // Arrange
                var track            = new ViewerUpdateModel();
                var expected         = new Viewer();
                var ratingGetService = new Mock <IRatingGetService>();

                ratingGetService.Setup(x => x.ValidateAsync(track));
                var trackDataAccess = new Mock <IViewerDataAccess>();

                trackDataAccess.Setup(x => x.InsertAsync(track)).ReturnsAsync(expected);
                var trackGetService = new ViewerCreateService(trackDataAccess.Object, ratingGetService.Object);
                // Act
                var result = await trackGetService.CreateAsync(track);

                // Assert
                result.Should().Be(expected);
            }
            public async Task CreateAsync_ViewerValidationFailed_ThrowsError()
            {
                // Arrange
                var fixture          = new Fixture();
                var track            = new ViewerUpdateModel();
                var expected         = fixture.Create <string>();
                var ratingGetService = new Mock <IRatingGetService>();

                ratingGetService
                .Setup(x => x.ValidateAsync(track))
                .Throws(new InvalidOperationException(expected));
                var trackDataAccess = new Mock <IViewerDataAccess>();
                var trackGetService = new ViewerCreateService(trackDataAccess.Object, ratingGetService.Object);
                // Act
                var action = new Func <Task>(() => trackGetService.CreateAsync(track));
                // Assert
                await action.Should().ThrowAsync <InvalidOperationException>().WithMessage(expected);

                trackDataAccess.Verify(x => x.InsertAsync(track), Times.Never);
            }