def test_at_symbol_in_username(self):
        parts = normalize('user@example.com@www.example.com')
        eq_(parts[0], 'user@example.com')
        eq_(parts[1], 'www.example.com')
normalize() should allow '@' in usernames (i.e. last '@' is split char)
dataset/ETHPy150Open fabric/fabric/tests/test_network.py/TestNetwork.test_at_symbol_in_username