import re
import time
import subprocess
import unittest
from unit.applications.lang.python import TestApplicationPython
class TestRespawn(TestApplicationPython):
prerequisites = {'modules': {'python': 'any'}}
PATTERN_ROUTER = 'unit: router'
PATTERN_CONTROLLER = 'unit: controller'
def setUp(self):
super().setUp()
self.app_name = "app-" + self.testdir.split('/')[-1]
self.load('empty', self.app_name)
self.assertIn(
'success',
self.conf('1', 'applications/' + self.app_name + '/processes')
)
def pid_by_name(self, name):
output = subprocess.check_output(['ps', 'ax']).decode()
m = re.search('\s*(\d+).*' + name, output)
return m if m is None else m.group(1)
def kill_pids(self, *pids):
subprocess.call(['kill', '-9'] + list(pids))
def wait_for_process(self, process):
for i in range(50):
found = self.pid_by_name(process)
if found is not None:
break
time.sleep(0.1)
return found
def smoke_test(self):
for _ in range(5):
self.assertIn(
'success',
self.conf('1', 'applications/' + self.app_name + '/processes')
)
self.assertEqual(self.get()['status'], 200)
# Check if the only one router, controller,
# and application processes running.
output = subprocess.check_output(['ps', 'ax']).decode()
self.assertEqual(len(re.findall(self.PATTERN_ROUTER, output)), 1)
self.assertEqual(len(re.findall(self.PATTERN_CONTROLLER, output)), 1)
self.assertEqual(len(re.findall(self.app_name, output)), 1)
def test_respawn_router(self):
pid = self.pid_by_name(self.PATTERN_ROUTER)
self.kill_pids(pid)
self.skip_alerts.append(r'process %s exited on signal 9' % pid)
self.assertIsNotNone(self.wait_for_process(self.PATTERN_ROUTER))
self.smoke_test()
def test_respawn_controller(self):
pid = self.pid_by_name(self.PATTERN_CONTROLLER)
self.kill_pids(pid)
self.skip_alerts.append(r'process %s exited on signal 9' % pid)
self.assertIsNotNone(self.wait_for_process(self.PATTERN_CONTROLLER))
self.assertEqual(self.get()['status'], 200)
self.smoke_test()
def test_respawn_application(self):
pid = self.pid_by_name(self.app_name)
self.kill_pids(pid)
self.skip_alerts.append(r'process %s exited on signal 9' % pid)
self.assertIsNotNone(self.wait_for_process(self.app_name))
self.smoke_test()
if __name__ == '__main__':
TestRespawn.main()
