xref: /unit/test/test_respawn.py (revision 1635:97afbb6c5a15)
1import re
2import subprocess
3import time
4
5from conftest import skip_alert
6from unit.applications.lang.python import TestApplicationPython
7
8
9class TestRespawn(TestApplicationPython):
10    prerequisites = {'modules': {'python': 'any'}}
11
12    PATTERN_ROUTER = 'unit: router'
13    PATTERN_CONTROLLER = 'unit: controller'
14
15    def setup_method(self):
16        super().setup_method()
17
18        self.app_name = "app-" + self.temp_dir.split('/')[-1]
19
20        self.load('empty', self.app_name)
21
22        assert 'success' in self.conf(
23            '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(r'\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            assert 'success' in self.conf(
48                '1', 'applications/' + self.app_name + '/processes'
49            )
50            assert self.get()['status'] == 200
51
52        # Check if the only one router, controller,
53        # and application processes running.
54
55        output = subprocess.check_output(['ps', 'ax']).decode()
56        assert len(re.findall(self.PATTERN_ROUTER, output)) == 1
57        assert len(re.findall(self.PATTERN_CONTROLLER, output)) == 1
58        assert len(re.findall(self.app_name, output)) == 1
59
60    def test_respawn_router(self):
61        pid = self.pid_by_name(self.PATTERN_ROUTER)
62
63        self.kill_pids(pid)
64        skip_alert(r'process %s exited on signal 9' % pid)
65
66        assert self.wait_for_process(self.PATTERN_ROUTER) is not None
67
68        self.smoke_test()
69
70    def test_respawn_controller(self):
71        pid = self.pid_by_name(self.PATTERN_CONTROLLER)
72
73        self.kill_pids(pid)
74        skip_alert(r'process %s exited on signal 9' % pid)
75
76        assert self.wait_for_process(self.PATTERN_CONTROLLER) is not None
77
78        assert self.get()['status'] == 200
79
80        self.smoke_test()
81
82    def test_respawn_application(self):
83        pid = self.pid_by_name(self.app_name)
84
85        self.kill_pids(pid)
86        skip_alert(r'process %s exited on signal 9' % pid)
87
88        assert self.wait_for_process(self.app_name) is not None
89
90        self.smoke_test()
91