@Override
    public byte convertToByte(CharSequence value) {
        if (value instanceof AsciiString && value.length() == 1) {
            return ((AsciiString) value).byteAt(0);
        }
        return Byte.parseByte(value.toString());
    }
@Test
    public void testByteFromEmptyAsciiString() {
        assertThrows(NumberFormatException.class, new Executable() {
            @Override
            public void execute() {
                converter.convertToByte(AsciiString.EMPTY_STRING);
            }
        });
    }