xref: /unit/test/test_respawn.py (revision 1471:38ede0766e1a)
1import re
2import time
3import subprocess
4import unittest
5from unit.applications.lang.python import TestApplicationPython
6
7
8class TestRespawn(TestApplicationPython):
9    prerequisites = {'modules': {'python': 'any'}}
10
11    PATTERN_ROUTER = 'unit: router'
12    PATTERN_CONTROLLER = 'unit: controller'
13
14    def setUp(self):
15        super().setUp()
16
17        self.app_name = "app-" + self.testdir.split('/')[-1]
18
19        self.load('empty', self.app_name)
20
21        self.assertIn(
22            'success',
23            self.conf('1', 'applications/' + self.app_name + '/processes')
24        )
25
26    def pid_by_name(self, name):
27        output = subprocess.check_output(['ps', 'ax']).decode()
28        m = re.search('\s*(\d+).*' + name, output)
29        return m if m is None else m.group(1)
30
31    def kill_pids(self, *pids):
32        subprocess.call(['kill', '-9'] + list(pids))
33
34    def wait_for_process(self, process):
35        for i in range(50):
36            found = self.pid_by_name(process)
37
38            if found is not None:
39                break
40
41            time.sleep(0.1)
42
43        return found
44
45    def smoke_test(self):
46        for _ in range(5):
47            self.assertIn(
48                'success',
49                self.conf('1', 'applications/' + self.app_name + '/processes')
50            )
51            self.assertEqual(self.get()['status'], 200)
52
53        # Check if the only one router, controller,
54        # and application processes running.
55
56        output = subprocess.check_output(['ps', 'ax']).decode()
57        self.assertEqual(len(re.findall(self.PATTERN_ROUTER, output)), 1)
58        self.assertEqual(len(re.findall(self.PATTERN_CONTROLLER, output)), 1)
59        self.assertEqual(len(re.findall(self.app_name, output)), 1)
60
61    def test_respawn_router(self):
62        pid = self.pid_by_name(self.PATTERN_ROUTER)
63
64        self.kill_pids(pid)
65        self.skip_alerts.append(r'process %s exited on signal 9' % pid)
66
67        self.assertIsNotNone(self.wait_for_process(self.PATTERN_ROUTER))
68
69        self.smoke_test()
70
71    def test_respawn_controller(self):
72        pid = self.pid_by_name(self.PATTERN_CONTROLLER)
73
74        self.kill_pids(pid)
75        self.skip_alerts.append(r'process %s exited on signal 9' % pid)
76
77        self.assertIsNotNone(self.wait_for_process(self.PATTERN_CONTROLLER))
78
79        self.assertEqual(self.get()['status'], 200)
80
81        self.smoke_test()
82
83    def test_respawn_application(self):
84        pid = self.pid_by_name(self.app_name)
85
86        self.kill_pids(pid)
87        self.skip_alerts.append(r'process %s exited on signal 9' % pid)
88
89        self.assertIsNotNone(self.wait_for_process(self.app_name))
90
91        self.smoke_test()
92
93
94if __name__ == '__main__':
95    TestRespawn.main()
96