# -*- coding: utf-8 -*-
import unittest
import doctest

def _to_xsistemo(s):
    """Turn a nice unicode string into an hideous x-systemo one.
    
    >>> _to_xsistemo(u"ĈĉĜĝĤĥĴĵŜŝŬŭ")
    'CxcxGxgxHxhxJxjxSxsxUxux'
    
    """
    replacements = [
        (u"Ĉ", "Cx"),
        (u"ĉ", "cx"),
        (u"Ĝ", "Gx"),
        (u"ĝ", "gx"),
        (u"Ĥ", "Hx"),
        (u"ĥ", "hx"),
        (u"Ĵ", "Jx"),
        (u"ĵ", "jx"),
        (u"Ŝ", "Sx"),
        (u"ŝ", "sx"),
        (u"Ŭ", "Ux"),
        (u"ŭ", "ux"),
    ]
    
    for old, new in replacements:
        s = s.replace(old, new)
    
    try:
        s = s.encode("ascii")
        return s
    except:
        return repr(s)

class ToXSistemoTest(unittest.TestCase):
    def test_to_xsistemo(self):
        self.assertEquals(
            'CxcxGxgxHxhxJxjxSxsxUxux',
            _to_xsistemo(u"ĈĉĜĝĤĥĴĵŜŝŬŭ"))

def _test():
    doctest.testmod()
    unittest.main()

if __name__ == "__main__":
    _test()