public void Get_Stream_From_File_And_Then_Resize_It_Should_Success() { using (Stream inputStream = (Stream)File.OpenRead(_mediaFilePath)) { // Arrange var transformationOptions = GetTransformationOptions(); var imageFormat = GetImageFormat(); // Act var outputStream = _imageResizer.ResizeImageFromStream(inputStream, transformationOptions, imageFormat); // Assert System.Diagnostics.Debug.Print($"Stream length {outputStream.Length}"); Assert.True(outputStream.Length > 0); } }