def test_str_rstrip(self):
"""Check matches the python string rstrip method."""
self._test_method("rstrip")
s = Seq(" ACGT ")
m = MutableSeq(" ACGT ")
self.assertEqual(s.rstrip(), " ACGT")
self.assertRaises(TypeError, s.rstrip, 7)
self.assertEqual(s, " ACGT ")
self.assertEqual(m.rstrip(), " ACGT")
self.assertRaises(TypeError, m.rstrip, 7)
self.assertEqual(m, " ACGT ")
self.assertEqual(m.rstrip(inplace=True), " ACGT")
self.assertEqual(m, " ACGT")
