def test_log(self): series = self._generate_series_list(config=[range(101)]) log = functions.logarithm({}, series)[0] self.assertEqual(log[0], None) self.assertEqual(log[1], 0) self.assertEqual(log[10], 1) self.assertEqual(log[100], 2) series = self._generate_series_list(config=[[None] * 100]) log = functions.logarithm({}, series)[0] self.assertEqual(list(log), [None] * 100)