public void ReturnByteArrayOfJson_WhenJsonIsNotNull()
        {
            // Arange
            var contextMock = new Mock <ApplicationDbContext>();
            var stream      = new FileStream(Path.Combine(AppDomain.CurrentDomain.BaseDirectory,
                                                          @"files\Course.json"), FileMode.Open);

            var fileBaseMock = new Mock <HttpPostedFileBase>();

            fileBaseMock.Setup(m => m.InputStream).Returns(stream);

            byte[] rightByteArray;
            using (MemoryStream ms = new MemoryStream())
            {
                fileBaseMock.Object.InputStream.Seek(0, SeekOrigin.Begin);
                fileBaseMock.Object.InputStream.CopyTo(ms);
                rightByteArray = ms.GetBuffer();
            }

            var uploadService = new UploadCourseService(contextMock.Object);

            // Act
            var actualResult = uploadService.ImageToByteArray(fileBaseMock.Object);

            // Assert
            CollectionAssert.AreEqual(rightByteArray, actualResult);
            stream.Dispose();
        }
        public void ReturnNull_WhenJsonIsNull()
        {
            // Arange
            var contextMock   = new Mock <ApplicationDbContext>();
            var uploadService = new UploadCourseService(contextMock.Object);

            // Act
            var actualResult = uploadService.ImageToByteArray(null);

            // Assert
            Assert.AreEqual(null, actualResult);
        }