         XCTAssertNil(XMLOutput["colorInvalidRGBString"])
         XCTAssertNil(XMLOutput["colorErrorInScanHex"])
         XCTAssertEqual(XMLOutput["colorGrayscale"] as? String, "000000FF")
+        XCTAssertNil(XMLOutput["colorNotAString"])
 	}
 }
 

            "color4lenght": "F00f",
            "color8lenght": "ff0000ff",
            "colorInvalidRGBString": "ff",
            "colorErrorInScanHex": "-"
		]
		
		let transform = mapper.map(XML: XML)

        XCTAssertEqual(transform?.color8lenght, TestHexColor.red)
        XCTAssertNil(transform?.colorInvalidRGBString)
        XCTAssertNil(transform?.colorErrorInScanHex)
        XCTAssertNil(transform?.colorNotAString)
        
        transform?.colorGrayscale = UIColor(white: 0, alpha: 1)
		
