def test_hash_function(self):
"""``keyhasher`` produces HMAC SHA1 using key iterator for keys"""
hash_func = eventlogging.keyhasher((b'key1', b'key2'))
self.assertEqual(hash_func('message1'),
'e45a01bfebb0d5596564cc7b712b2d570041a839')
self.assertEqual(hash_func('message2'),
'c8ec32b32d5bd7dc5a6a0b203f7f220bb641f52c')
def test_keys_depleted(self):
"""``keyhasher`` raises StopIteration if key iterator is depleted."""
hash_func = eventlogging.keyhasher(())
with self.assertRaises(StopIteration):
hash_func('message')
