def test_create_user_arns_many(self):
arns = create_user_arns('1234567890', ['john', 'eric', 'michael'])
self.assertIsInstance(arns, list)
self.assertEqual(3, len(arns))
self.assertEqual('arn:aws:iam::1234567890:user/john', arns[0])
def test_create_user_arn_single(self):
arn = create_user_arns('1234567890', 'biggles')
self.assertIsInstance(arn, basestring)
self.assertEqual('arn:aws:iam::1234567890:user/biggles', arn)
