public void MarkerConstructorAssignsProperties()
        {
            const byte app1     = JpegConstants.Markers.APP1;
            const int  position = 5;
            var        marker   = new JpegFileMarker(app1, position);

            Assert.Equal(app1, marker.Marker);
            Assert.Equal(position, marker.Position);
            Assert.False(marker.Invalid);
            Assert.Equal(app1.ToString("X"), marker.ToString());
        }