def test_associate_tag_is_written_to_url(self):
        tag = 'ABC12345'
        api = API(self.ACCESS_KEY, self.SECRET_KEY, 'de', associate_tag=tag)
        url = api._build_url(Operation='ItemSearch', SearchIndex='Books')

        qs = parse_qs(urlparse(url)[4])
        assert qs['AssociateTag'][0] == tag
 def _build_url(self, **qargs):
     qargs['Style'] = self.STYLE_SHEET
     return  API._build_url(self, **qargs)