def test_rc(self):
"""Alphabet rc should correctly reverse-complement sequence"""
self.assertEqual(RnaAlphabet.rc('UauCG-NR'), 'YN-CGauA')
self.assertEqual(DnaAlphabet.rc('TatCG-NR'), 'YN-CGatA')
self.assertEqual(RnaAlphabet.rc(''), '')
self.assertEqual(RnaAlphabet.rc('A'), 'U')
self.assertRaises(TypeError, ProteinAlphabet.rc, 'ACD')
#if it wasn't a string, result should be a list
self.assertEqual(RnaAlphabet.rc(list('UauCG-NR')),
list('YN-CGauA'))
self.assertEqual(RnaAlphabet.rc(('a','c')), ('g','u'))
#constructor should fail for a dict
self.assertRaises(ValueError, RnaAlphabet.rc, {'a':'c'})
