public void Cannot_Retrieve_TextImage_Data_For_Invalid_ID()
        {
            // Arrange - create a TextTemplate with image data
            TextTemplate textTemplate = new TextTemplate
            {
                Id = 1,
                Name = "TextTemplate1",
                Image = new byte[] { }
            };

            // Arrange - create the mock repository
            Mock<IRepository<TextTemplate>> mock = new Mock<IRepository<TextTemplate>>();
            mock.Setup(m => m.Get(1)).Returns(textTemplate);

            // Arrange - create the controller
            TextTemplateController target = new TextTemplateController(mock.Object);

            // Act - call the Image method
            HttpResponseMessage result = target.Image(100);

            // Assert
            Assert.IsInstanceOfType(result, typeof(HttpResponseMessage));
            Assert.AreEqual(result.StatusCode, HttpStatusCode.BadRequest);
        }
        public void Can_Retrieve_Text_Image_Data()
        {
            // Arrange - create a TextTemplate with image data
            TextTemplate textTemplate = new TextTemplate
            {
                Id = 1,
                Name = "TextTemplate1",
                Image = new byte[] { }
            };

            // Arrange - create the mock repository
            Mock<IRepository<TextTemplate>> mock = new Mock<IRepository<TextTemplate>>();
            mock.Setup(m => m.Get(1)).Returns(textTemplate);

            // Arrange - create the controller
            TextTemplateController target = new TextTemplateController(mock.Object);

            // Act - call the Image method
            HttpResponseMessage result = target.Image(1);

            // Assert
            Assert.IsNotNull(result);
            Assert.IsInstanceOfType(result, typeof(HttpResponseMessage));
            Assert.AreEqual(result.StatusCode, HttpStatusCode.OK);
            Assert.AreEqual(result.Content.Headers.ContentType.MediaType, "image/png");
        }