public void Render(string filename, int pagenum, double ratio, int width, int height) { var src = GetSource(filename); var dest = Get($"{IO.Get(src).BaseName}-{pagenum}.png"); using (var reader = new DocumentReader(GetSource(filename))) { var page = reader.GetPage(pagenum); using (var image = reader.Render(page, ratio)) { Assert.That(image.Width, Is.EqualTo(width)); Assert.That(image.Height, Is.EqualTo(height)); image.Save(dest, ImageFormat.Png); } } Assert.That(IO.Exists(dest), Is.True); }