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# This file is part of cloud-init. See LICENSE file for license information.
"""Tests for cloudinit.dhclient_hook."""
from cloudinit import dhclient_hook as dhc
from cloudinit.tests.helpers import CiTestCase, dir2dict, populate_dir
import argparse
import json
import os
from unittest import mock
class TestDhclientHook(CiTestCase):
ex_env = {
'interface': 'eth0',
'new_dhcp_lease_time': '3600',
'new_host_name': 'x1',
'new_ip_address': '10.145.210.163',
'new_subnet_mask': '255.255.255.0',
'old_host_name': 'x1',
'PATH': '/usr/sbin:/usr/bin:/sbin:/bin',
'pid': '614',
'reason': 'BOUND',
}
# some older versions of dhclient put the same content,
# but in upper case with DHCP4_ instead of new_
ex_env_dhcp4 = {
'REASON': 'BOUND',
'DHCP4_dhcp_lease_time': '3600',
'DHCP4_host_name': 'x1',
'DHCP4_ip_address': '10.145.210.163',
'DHCP4_subnet_mask': '255.255.255.0',
'INTERFACE': 'eth0',
'PATH': '/usr/sbin:/usr/bin:/sbin:/bin',
'pid': '614',
}
expected = {
'dhcp_lease_time': '3600',
'host_name': 'x1',
'ip_address': '10.145.210.163',
'subnet_mask': '255.255.255.0'}
def setUp(self):
super(TestDhclientHook, self).setUp()
self.tmp = self.tmp_dir()
def test_handle_args(self):
"""quick test of call to handle_args."""
nic = 'eth0'
args = argparse.Namespace(event=dhc.UP, interface=nic)
with mock.patch.dict("os.environ", clear=True, values=self.ex_env):
dhc.handle_args(dhc.NAME, args, data_d=self.tmp)
found = dir2dict(self.tmp + os.path.sep)
self.assertEqual([nic + ".json"], list(found.keys()))
self.assertEqual(self.expected, json.loads(found[nic + ".json"]))
def test_run_hook_up_creates_dir(self):
"""If dir does not exist, run_hook should create it."""
subd = self.tmp_path("subdir", self.tmp)
nic = 'eth1'
dhc.run_hook(nic, 'up', data_d=subd, env=self.ex_env)
self.assertEqual(
set([nic + ".json"]), set(dir2dict(subd + os.path.sep)))
def test_run_hook_up(self):
"""Test expected use of run_hook_up."""
nic = 'eth0'
dhc.run_hook(nic, 'up', data_d=self.tmp, env=self.ex_env)
found = dir2dict(self.tmp + os.path.sep)
self.assertEqual([nic + ".json"], list(found.keys()))
self.assertEqual(self.expected, json.loads(found[nic + ".json"]))
def test_run_hook_up_dhcp4_prefix(self):
"""Test run_hook filters correctly with older DHCP4_ data."""
nic = 'eth0'
dhc.run_hook(nic, 'up', data_d=self.tmp, env=self.ex_env_dhcp4)
found = dir2dict(self.tmp + os.path.sep)
self.assertEqual([nic + ".json"], list(found.keys()))
self.assertEqual(self.expected, json.loads(found[nic + ".json"]))
def test_run_hook_down_deletes(self):
"""down should delete the created json file."""
nic = 'eth1'
populate_dir(
self.tmp, {nic + ".json": "{'abcd'}", 'myfile.txt': 'text'})
dhc.run_hook(nic, 'down', data_d=self.tmp, env={'old_host_name': 'x1'})
self.assertEqual(
set(['myfile.txt']),
set(dir2dict(self.tmp + os.path.sep)))
def test_get_parser(self):
"""Smoke test creation of get_parser."""
# cloud-init main uses 'action'.
event, interface = (dhc.UP, 'mynic0')
self.assertEqual(
argparse.Namespace(event=event, interface=interface,
action=(dhc.NAME, dhc.handle_args)),
dhc.get_parser().parse_args([event, interface]))
# vi: ts=4 expandtab
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