def test_disparity_single_date(self):
     ut_input = etree.fromstring("{0}{1}1945{2}{3}".format("<unittitle>", "<unitdate>", "</unitdate>", "</unittitle>"))
     self.assertEquals(find_date_disparity(ut_input), 0)
 def test_disparity_ranges_plus_single(self):
     ut_input = etree.fromstring("{0}{1}1945-1956{2}, {1}1956-1975{2}, {1}1900{2}{3}".format("<unittitle>", "<unitdate>", "</unitdate>", "</unittitle>"))
     self.assertEquals(find_date_disparity(ut_input), 45)