 
     private function generateImage(resultBits:Array, imageWidth:Number,
         imageHeight:Number):Bitmap {
-      // generate an image
       var bitmapData:BitmapData = new BitmapData(imageWidth, imageHeight, false,
           0xFFFFFF);
       var bitmap:Bitmap = new Bitmap(bitmapData);

    }

    [Test(description="Encode a number, decode it, and compare.")]
    public function encodedEAN8shouldBeDecodedSuccessfully():void {
      var testCode:Number = 48512343;
      var decodedNumber:Number = encodeAndDecode(testCode);
      assertEquals(testCode, decodedNumber);
    }

    [Test(description="Bug: Endoding and decoding 1 fails")]
    public function shouldEncodeAndDecodeAnyValidEAN8number():void {
      var testCode:Number = 12345678;
      var decodedNumber:Number = encodeAndDecode(testCode);
      assertEquals(testCode, decodedNumber);
    }

    private function encodeAndDecode(testCode:Number):Number {

      }
      return contents;
    }

    public function calculateEANChecksumDigit(number:Number):Number {
      var checksum:Number = 0;
      var weightedSumOfDigits:Number = 0;
      var weight:Number = 3;
      while (number > 0) {
        var lastDigit:int = number % 10;
        weightedSumOfDigits = weightedSumOfDigits + lastDigit * weight;
        number = (number - lastDigit) / 10;
        weight = weight == 3 ? 1 : 3;
      }
      var additionToTen:Number = weightedSumOfDigits % 10;
      if (additionToTen > 0) {
        checksum = 10 - additionToTen;
      }
      return checksum;
    }
  }
}
