public void ImageGetAttachmentPageTest() { var file = TestFiles.WithAttachmentMsg; var pageNumber = 1; var request = new ImageGetAttachmentPageRequest { FileName = file.FileName, AttachmentName = file.AttachmentName, PageNumber = pageNumber, Format = null, Width = null, Height = null, Quality = null, Password = null, AttachmentPassword = file.AttachmentPassword, ExtractText = null, RenderComments = null, RenderHiddenPages = null, DefaultFontName = null, FontsFolder = null, Folder = file.Folder, Storage = null }; var response = ViewerApi.ImageGetAttachmentPage(request); Assert.IsInstanceOf <System.IO.Stream>(response, "Expected response type is System.IO.Stream"); Assert.IsTrue(response.Length > 0); }