def test__logs_resolution_failures(self):
# Some ISPs configure their DNS to resolve to an ads page when a domain
# doesn't exist. This ensures resolving fails so the test passes.
exception = socket.gaierror()
exception.errno = random.choice(
list(config._gen_addresses_where_possible_suppress))
exception.strerror = '[Errno ...] ...'
self.patch(config, '_gen_addresses').side_effect = exception
with FakeLogger(config.__name__) as logger:
config._get_addresses("no-way-this-exists.maas.io")
self.assertThat(logger.output.strip(), DocTestMatches(
"Could not resolve no-way-this-exists.maas.io: [Errno ...] ..."))
def test__ignores_resolution_failures(self):
# Some ISPs configure their DNS to resolve to an ads page when a domain
# doesn't exist. This ensures resolving fails so the test passes.
self.patch(config, '_gen_addresses_where_possible').return_value = []
self.assertThat(
config._get_addresses("no-way-this-exists.maas.io"),
Equals(([], [])))
def test_ip_addresses_are_passed_through(self):
address4 = factory.make_ipv4_address()
address6 = factory.make_ipv6_address()
self.assertThat(
config._get_addresses(address4, address6),
Equals(([address4], [address6])),
)
def test__renders_ntp_servers_as_comma_separated_list(self):
params = make_sample_params(self, ipv6=self.ipv6)
rendered = config.get_config(self.template, **params)
validate_dhcpd_configuration(self, rendered, self.ipv6)
ntp_servers_expected = flatten([
server if is_ip_address(server) else _get_addresses(server)
for network in params['shared_networks']
for subnet in network['subnets']
for server in subnet["ntp_servers"]
])
ntp_servers_observed = [
server for server_line in re.findall(
r"\b(?:ntp-servers|dhcp6[.]sntp-servers)\s+(.+);", rendered)
for server in server_line.split(", ")
]
self.assertItemsEqual(ntp_servers_expected, ntp_servers_observed)
