def setUp(self):
self._expander = MacroExpander()
self._expander.add_macro('upper', lambda x: x.upper())
self._expander.add_macro('lower', lambda x: x.lower())
self._expander.add_macro('gjb', lambda: 'Geert Jan Bex')
self._expander.add_macro('repeat', lambda x, n: int(n) * x)
self._expander.add_macro('cat', lambda x, y: x + '-' + y)
self._expander.add_macro('add', lambda x, y: str(int(x) + int(y)))
