def test_good(self, out):
out.return_value = '''\
wlan0 Link encap:Ethernet HWaddr e0:91:53:62:ac:0a
inet addr:10.0.1.22 Bcast:10.0.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:206316 errors:0 dropped:208633 overruns:0 frame:0
TX packets:239308 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:37438823 (35.7 MiB) TX bytes:293610377 (280.0 MiB)
'''
eq_(heartbeat.get_ip_addr(), '10.0.1.22')
def test_bad(self, out):
out.side_effect = subprocess.CalledProcessError(1, 'ifconfig',
output='Device not found')
eq_(heartbeat.get_ip_addr(), None)