def test_supervisor(self, mock_process_class):
mp = mock_process_class.return_value
mp.exitcode = None
supervisor = Supervisor(target=server_process1)
self.assertFalse(supervisor.is_server_running())
supervisor.start_server()
self.assertTrue(mock_process_class.called)
self.assertTrue(mp.start.called)
self.assertTrue(supervisor.is_server_running())
supervisor.stop_server()
self.assertTrue(mp.terminate.called)
self.assertFalse(supervisor.is_server_running())
def test_supervisor_with_server_normally_exit(self, mock_process_class):
mp = mock_process_class.return_value
mp.exitcode = None
supervisor = Supervisor(target=server_process1)
self.assertFalse(supervisor.is_server_running())
supervisor.start_server()
self.assertTrue(mock_process_class.called)
self.assertTrue(mp.start.called)
self.assertTrue(supervisor.is_server_running())
# emulate server process exits normally.
mp.exitcode = 0
self.assertFalse(supervisor.health_check())
self.assertEqual(mp.start.call_count, 1)
supervisor.stop_server()
self.assertFalse(mp.terminate.called)
self.assertFalse(supervisor.is_server_running())
def test_supervisor(self, mock_process_class):
mp = mock_process_class.return_value
mp.exitcode = None
supervisor = Supervisor(target=server_process1)
self.assertFalse(supervisor.is_server_running())
supervisor.start_server()
self.assertTrue(mock_process_class.called)
self.assertTrue(mp.start.called)
self.assertTrue(supervisor.is_server_running())
supervisor.stop_server()
self.assertTrue(mp.terminate.called)
self.assertFalse(supervisor.is_server_running())
def test_supervisor_with_server_normally_exit(self, mock_process_class):
mp = mock_process_class.return_value
mp.exitcode = None
supervisor = Supervisor(target=server_process1)
self.assertFalse(supervisor.is_server_running())
supervisor.start_server()
self.assertTrue(mock_process_class.called)
self.assertTrue(mp.start.called)
self.assertTrue(supervisor.is_server_running())
# emulate server process exits normally.
mp.exitcode = 0
self.assertFalse(supervisor.health_check())
self.assertEqual(mp.start.call_count, 1)
supervisor.stop_server()
self.assertFalse(mp.terminate.called)
self.assertFalse(supervisor.is_server_running())
def test_supervisor_with_server_abnormally_exit(self, mock_process_class):
mp = mock_process_class.return_value
mp.exitcode = None
supervisor = Supervisor(target=server_process1)
self.assertFalse(supervisor.is_server_running())
supervisor.start_server()
self.assertTrue(mock_process_class.called)
self.assertTrue(mp.start.called)
self.assertTrue(supervisor.is_server_running())
# emulate server process exits abnormally.
mp.exitcode = -1
self.assertTrue(supervisor.health_check())
self.assertEqual(mp.start.call_count, 2)
# exitcode = 1 indicates that server requested to restart.
mp.exitcode = 1
self.assertTrue(supervisor.health_check())
self.assertEqual(mp.start.call_count, 3)
# in case that restarting too many times, supervisor should give up.
for i in range(5):
mp.exitcode = -1
supervisor.health_check()
self.assertFalse(supervisor.health_check())
supervisor.stop_server()
self.assertFalse(mp.terminate.called)
self.assertFalse(supervisor.is_server_running())
def test_supervisor_with_server_abnormally_exit(self, mock_process_class):
mp = mock_process_class.return_value
mp.exitcode = None
supervisor = Supervisor(target=server_process1)
self.assertFalse(supervisor.is_server_running())
supervisor.start_server()
self.assertTrue(mock_process_class.called)
self.assertTrue(mp.start.called)
self.assertTrue(supervisor.is_server_running())
# emulate server process exits abnormally.
mp.exitcode = -1
self.assertTrue(supervisor.health_check())
self.assertEqual(mp.start.call_count, 2)
# exitcode = 1 indicates that server requested to restart.
mp.exitcode = 1
self.assertTrue(supervisor.health_check())
self.assertEqual(mp.start.call_count, 3)
# in case that restarting too many times, supervisor should give up.
for i in range(5):
mp.exitcode = -1
supervisor.health_check()
self.assertFalse(supervisor.health_check())
supervisor.stop_server()
self.assertFalse(mp.terminate.called)
self.assertFalse(supervisor.is_server_running())