public void ThrowInvalidOperationException_WhenModelStateIsInvalid()
        {
            // Arrange
            var galleryServiceMock = new Mock <IGalleryImageService>();
            var userServiceMock    = new Mock <IUserService>();
            var mappingServiceMock = new Mock <IMappingService>();
            var utilsMock          = new Mock <IUtilitiesService>();

            var controller = new GalleryController(galleryServiceMock.Object, mappingServiceMock.Object, userServiceMock.Object, utilsMock.Object);

            controller.ViewData.ModelState.AddModelError("asdasda", "asdasdasd");

            var model = new GalleryItemViewModel();

            // Act & Assert
            Assert.Throws <InvalidOperationException>(() => controller.Comment(Guid.NewGuid(), model));
        }
        public void CallAddCommentMethod_WhenParamsAreValid()
        {
            // Arrange
            var galleryServiceMock = new Mock <IGalleryImageService>();
            var userServiceMock    = new Mock <IUserService>();
            var mappingServiceMock = new Mock <IMappingService>();
            var utilsMock          = new Mock <IUtilitiesService>();

            var controller = new GalleryController(galleryServiceMock.Object, mappingServiceMock.Object, userServiceMock.Object, utilsMock.Object);

            var controllerContext = new Mock <ControllerContext>();
            var user = new Mock <IPrincipal>();

            user.Setup(p => p.IsInRole("admin")).Returns(true);
            user.SetupGet(x => x.Identity.Name).Returns("username");
            controllerContext.SetupGet(x => x.HttpContext.User).Returns(user.Object);
            controller.ControllerContext = controllerContext.Object;

            galleryServiceMock.Setup(x => x.AddComment(It.IsAny <string>(), It.IsAny <string>(), It.IsAny <Guid>()));

            var image = new GalleryImage();

            galleryServiceMock.Setup(x => x.GetGalleryImageById(It.IsAny <Guid>())).Returns(image);

            var model = new GalleryItemViewModel();

            mappingServiceMock.Setup(x => x.Map <GalleryItemViewModel>(image)).Returns(model);

            var userModel = new User();

            userServiceMock.Setup(x => x.GetById(It.IsAny <string>())).Returns(userModel);

            // Act
            controller.Comment(Guid.NewGuid(), model);

            // Assert
            galleryServiceMock.Verify(x => x.AddComment(It.IsAny <string>(), It.IsAny <string>(), It.IsAny <Guid>()), Times.Once);
        }