test_unit.py 文件源码

def test_covering_cidr(ips):
    """
    covering_cidr() gets the minimal CIDR that covers given IPs.

    In particular, that means any subnets should *not* cover all given IPs.
    """
    cidr = telepresence.vpn.covering_cidr(ips)
    assert isinstance(cidr, str)
    cidr = ipaddress.IPv4Network(cidr)
    assert cidr.prefixlen <= 24
    # All IPs in given CIDR:
    ips = [ipaddress.IPv4Address(i) for i in ips]
    assert all([ip in cidr for ip in ips])
    # Subnets do not contain all IPs if we're not in minimum 24 bit CIDR:
    if cidr.prefixlen < 24:
        for subnet in cidr.subnets():
            assert not all([ip in subnet for ip in ips])