def test_complement(self):
"""Alphabet complement should correctly complement sequence"""
self.assertEqual(RnaAlphabet.complement('UauCG-NR'), 'AuaGC-NY')
self.assertEqual(DnaAlphabet.complement('TatCG-NR'), 'AtaGC-NY')
self.assertEqual(RnaAlphabet.complement(''), '')
self.assertRaises(TypeError, ProteinAlphabet.complement, 'ACD')
#if it wasn't a string, result should be a list
self.assertEqual(RnaAlphabet.complement(list('UauCG-NR')),
list('AuaGC-NY'))
self.assertEqual(RnaAlphabet.complement(('a','c')), ('u','g'))
#constructor should fail for a dict
self.assertRaises(ValueError, RnaAlphabet.complement, {'a':'c'})
