+ def test_remove_start(self):
+ self.assertEqual(remove_start(None, 'A - '), None)
+ self.assertEqual(remove_start('A - B', 'A - '), 'B')
+ self.assertEqual(remove_start('B - A', 'A - '), 'B - A')
+
+ def test_remove_end(self):
+ self.assertEqual(remove_end(None, ' - B'), None)
+ self.assertEqual(remove_end('A - B', ' - B'), 'A')
+ self.assertEqual(remove_end('B - A', ' - B'), 'B - A')
+