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test_heartbeat.py
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/
test_heartbeat.py
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import time
from amqpstorm.exception import AMQPConnectionError
from amqpstorm.heartbeat import Heartbeat
from amqpstorm.tests.utility import TestFramework
from amqpstorm.tests.utility import fake_function
class HeartbeatTests(TestFramework):
def test_heartbeat_start(self):
heartbeat = Heartbeat(60, fake_function)
self.assertFalse(heartbeat._running.is_set())
heartbeat.start([])
self.assertTrue(heartbeat._running.is_set())
self.assertIsNotNone(heartbeat._timer)
heartbeat.stop()
def test_heartbeat_disabled(self):
heartbeat = Heartbeat(0, fake_function)
self.assertFalse(heartbeat._running.is_set())
heartbeat.start([])
self.assertFalse(heartbeat._running.is_set())
self.assertIsNone(heartbeat._timer)
def test_heartbeat_stop(self):
heartbeat = Heartbeat(60, fake_function)
self.assertFalse(heartbeat._running.is_set())
heartbeat.start([])
self.assertTrue(heartbeat._running.is_set())
heartbeat.stop()
self.assertFalse(heartbeat._running.is_set())
self.assertIsNone(heartbeat._timer)
def test_heartbeat_timeout(self):
heartbeat = Heartbeat(60, fake_function)
self.assertEqual(heartbeat._interval, 30)
self.assertEqual(heartbeat._threshold, 0)
heartbeat = Heartbeat(360, fake_function)
self.assertEqual(heartbeat._interval, 180)
self.assertEqual(heartbeat._threshold, 0)
def test_heartbeat_no_interval(self):
heartbeat = Heartbeat(0, fake_function)
self.assertEqual(heartbeat._interval, 0)
self.assertEqual(heartbeat._threshold, 0)
self.assertFalse(heartbeat.start([]))
heartbeat = Heartbeat(None, fake_function)
self.assertEqual(heartbeat._interval, None)
self.assertEqual(heartbeat._threshold, 0)
self.assertFalse(heartbeat.start([]))
def test_heartbeat_register_reads(self):
heartbeat = Heartbeat(60, fake_function)
time.sleep(0.01)
for _ in range(32):
heartbeat.register_read()
self.assertEqual(heartbeat._reads_since_check, 32)
def test_heartbeat_register_writes(self):
heartbeat = Heartbeat(60, fake_function)
time.sleep(0.01)
for _ in range(32):
heartbeat.register_write()
self.assertEqual(heartbeat._writes_since_check, 32)
def test_heartbeat_do_not_execute_life_signs_when_stopped(self):
heartbeat = Heartbeat(60, fake_function)
self.assertFalse(heartbeat._check_for_life_signs())
def test_heartbeat_do_not_start_new_timer_when_stopped(self):
heartbeat = Heartbeat(60, fake_function)
self.assertIsNone(heartbeat._timer)
heartbeat._start_new_timer()
self.assertIsNone(heartbeat._timer)
def test_heartbeat_basic_raise_on_missed_heartbeats(self):
heartbeat = Heartbeat(0.01, fake_function)
exceptions = []
self.assertTrue(heartbeat.start(exceptions))
time.sleep(0.1)
self.assertGreater(len(heartbeat._exceptions), 0)
heartbeat.stop()
def test_heartbeat_send_heartbeat(self):
self.beats = 0
def send_heartbeat():
self.beats += 1
heartbeat = Heartbeat(60, send_heartbeat_impl=send_heartbeat)
heartbeat._running.set()
for _ in range(8):
heartbeat.register_read()
self.assertTrue(heartbeat._check_for_life_signs())
self.assertEqual(self.beats, 8)
heartbeat.stop()
def test_heartbeat_threshold_reset(self):
heartbeat = Heartbeat(60, fake_function)
heartbeat._running.set()
heartbeat.register_write()
self.assertEqual(heartbeat._threshold, 0)
self.assertTrue(heartbeat._check_for_life_signs())
self.assertEqual(heartbeat._threshold, 1)
heartbeat.register_write()
heartbeat.register_read()
self.assertTrue(heartbeat._check_for_life_signs())
self.assertEqual(heartbeat._threshold, 0)
def test_heartbeat_raise_after_threshold(self):
heartbeat = Heartbeat(60, fake_function)
exceptions = []
self.assertTrue(heartbeat.start(exceptions))
heartbeat.register_write()
self.assertTrue(heartbeat._check_for_life_signs())
heartbeat.register_write()
self.assertFalse(heartbeat._check_for_life_signs())
self.assertTrue(exceptions)
heartbeat.stop()
def test_heartbeat_running_cleared_after_raise(self):
heartbeat = Heartbeat(60, fake_function)
exceptions = []
self.assertTrue(heartbeat.start(exceptions))
self.assertTrue(heartbeat._running.is_set())
heartbeat.register_write()
heartbeat._check_for_life_signs()
heartbeat.register_write()
heartbeat._check_for_life_signs()
self.assertFalse(heartbeat._running.is_set())
heartbeat.stop()
def test_heartbeat_raise_when_check_for_life_when_exceptions_not_set(self):
heartbeat = Heartbeat(60, fake_function)
heartbeat._running.set()
heartbeat._reads_since_check = 0
heartbeat._threshold = 3
heartbeat.register_write()
# Normally the exception should be passed down to the list of
# exceptions in the connection, but if that list for some obscure
# reason is None, we should raise directly in _check_for_life_signs.
self.assertRaises(AMQPConnectionError, heartbeat._check_for_life_signs)
def test_heartbeat_extended_loop(self):
self.beats = 0
def send_heartbeat():
self.beats += 1
heartbeat = Heartbeat(60, send_heartbeat_impl=send_heartbeat)
heartbeat._running.set()
heartbeat.register_read()
# Miss one write/
self.assertTrue(heartbeat._check_for_life_signs())
for _ in range(32):
heartbeat.register_read()
heartbeat.register_write()
self.assertFalse(heartbeat._threshold)
self.assertTrue(heartbeat._check_for_life_signs())
time.sleep(0.01)
heartbeat.register_write()
# Miss one read.
self.assertTrue(heartbeat._check_for_life_signs())
self.assertEqual(heartbeat._threshold, 1)
self.assertEqual(self.beats, 1)
heartbeat.register_read()
heartbeat.register_write()
self.assertTrue(heartbeat._check_for_life_signs())
self.assertEqual(heartbeat._threshold, 0)
heartbeat.stop()
def test_heartbeat_raise_exception(self):
heartbeat = Heartbeat(60, None)
self.assertRaisesRegex(
AMQPConnectionError,
'Connection dead, no heartbeat or data received in >= 60s',
heartbeat._raise_or_append_exception
)
heartbeat = Heartbeat(120, None)
self.assertRaisesRegex(
AMQPConnectionError,
'Connection dead, no heartbeat or data received in >= 120s',
heartbeat._raise_or_append_exception
)
def test_heartbeat_append_exception(self):
heartbeat = Heartbeat(60, None)
heartbeat._exceptions = []
def check(exception):
heartbeat._raise_or_append_exception()
if exception:
raise exception.pop()
self.assertRaisesRegex(
AMQPConnectionError,
'Connection dead, no heartbeat or data received in >= 60s',
check, heartbeat._exceptions
)
heartbeat._interval = 120 // 2
self.assertRaisesRegex(
AMQPConnectionError,
'Connection dead, no heartbeat or data received in >= 120s',
check, heartbeat._exceptions
)