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tests.py
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/
tests.py
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import asyncio
import itertools
import socket
import unittest.mock
from tornado import iostream, testing, web
from sprockets.mixins.metrics import statsd
from sprockets.mixins.metrics.testing import FakeStatsdServer
import examples.statsd
class CounterBumper(statsd.StatsdMixin, web.RequestHandler):
async def get(self, counter, value):
with self.execution_timer(*counter.split('.')):
await asyncio.sleep(float(value))
self.set_status(204)
self.finish()
def post(self, counter, amount):
self.increase_counter(*counter.split('.'), amount=int(amount))
self.set_status(204)
class DefaultStatusCode(statsd.StatsdMixin, web.RequestHandler):
def get(self):
pass
def assert_between(low, value, high):
if not (low <= value < high):
raise AssertionError('Expected {} to be between {} and {}'.format(
value, low, high))
class MisconfiguredStatsdMetricCollectionTests(testing.AsyncHTTPTestCase):
def get_app(self):
self.application = web.Application([
web.url('/', examples.statsd.SimpleHandler),
web.url('/counters/(.*)/([.0-9]*)', CounterBumper),
web.url('/status_code', DefaultStatusCode),
])
def test_bad_protocol_raises_ValueError(self):
with self.assertRaises(ValueError):
statsd.StatsDCollector(host='127.0.0.1',
port='8125',
protocol='bad_protocol')
class TCPStatsdMetricCollectionTests(testing.AsyncHTTPTestCase):
def get_app(self):
self.application = web.Application([
web.url('/', examples.statsd.SimpleHandler),
web.url('/counters/(.*)/([.0-9]*)', CounterBumper),
web.url('/status_code', DefaultStatusCode),
])
return self.application
def setUp(self):
self.application = None
self.namespace = 'testing'
super().setUp()
self.statsd = FakeStatsdServer(self.io_loop, protocol='tcp')
statsd.install(self.application, **{'namespace': self.namespace,
'host': self.statsd.sockaddr[0],
'port': self.statsd.sockaddr[1],
'protocol': 'tcp',
'prepend_metric_type': True})
@unittest.mock.patch.object(iostream.IOStream, 'write')
def test_write_not_executed_when_connection_is_closed(self, mock_write):
self.application.statsd._sock.close()
self.application.statsd.send('foo', 500, 'c')
mock_write.assert_not_called()
@unittest.mock.patch.object(iostream.IOStream, 'write')
def test_expected_counters_data_written(self, mock_sock):
path = ('foo', 'bar')
value = 500
metric_type = 'c'
expected = "{}:{}|{}\n".format('.'.join(
itertools.chain((self.namespace, 'counters'), path)),
value,
metric_type)
self.application.statsd.send(path, value, metric_type)
mock_sock.assert_called_once_with(expected.encode())
@unittest.mock.patch.object(iostream.IOStream, 'write')
def test_expected_timers_data_written(self, mock_sock):
path = ('foo', 'bar')
value = 500
metric_type = 'ms'
expected = "{}:{}|{}\n".format('.'.join(
itertools.chain((self.namespace, 'timers'), path)),
value,
metric_type)
self.application.statsd.send(path, value, metric_type)
mock_sock.assert_called_once_with(expected.encode())
def test_tcp_message_format(self):
expected = '{path}:{value}|{metric_type}\n'
self.assertEqual(self.application.statsd._msg_format, expected)
def test_that_http_method_call_is_recorded(self):
response = self.fetch('/')
self.assertEqual(response.code, 204)
expected = 'testing.timers.SimpleHandler.GET.204'
for path, value, stat_type in self.statsd.find_metrics(expected, 'ms'):
assert_between(250.0, float(value), 500.0)
def test_that_counter_increment_defaults_to_one(self):
response = self.fetch('/', method='POST', body='')
self.assertEqual(response.code, 204)
prefix = 'testing.counters.request.path'
for path, value, stat_type in self.statsd.find_metrics(prefix, 'c'):
self.assertEqual(int(value), 1)
def test_that_counter_accepts_increment_value(self):
response = self.fetch('/counters/path/5', method='POST', body='')
self.assertEqual(response.code, 204)
prefix = 'testing.counters.path'
for path, value, stat_type in self.statsd.find_metrics(prefix, 'c'):
self.assertEqual(int(value), 5)
def test_that_execution_timer_records_time_spent(self):
response = self.fetch('/counters/one.two.three/0.25')
self.assertEqual(response.code, 204)
prefix = 'testing.timers.one.two.three'
for path, value, stat_type in self.statsd.find_metrics(prefix, 'ms'):
assert_between(250.0, float(value), 300.0)
def test_that_add_metric_tag_is_ignored(self):
response = self.fetch('/',
headers={'Correlation-ID': 'does not matter'})
self.assertEqual(response.code, 204)
def test_that_status_code_is_used_when_not_explicitly_set(self):
response = self.fetch('/status_code')
self.assertEqual(response.code, 200)
expected = 'testing.timers.DefaultStatusCode.GET.200'
self.assertEqual(expected,
list(self.statsd.find_metrics(expected, 'ms'))[0][0])
def test_reconnect_logic(self):
self.application.statsd._tcp_reconnect_sleep = 0.05
self.application.statsd._sock.close()
asyncio.get_event_loop().run_until_complete(asyncio.sleep(0.075))
response = self.fetch('/status_code')
self.assertEqual(response.code, 200)
def test_that_mixin_works_without_client(self):
self.application.statsd.close()
delattr(self.application, 'statsd')
response = self.fetch('/', method='POST', body='')
self.assertEqual(response.code, 204)
def test_that_client_closes_socket(self):
response = self.fetch('/status_code')
self.assertEqual(response.code, 200)
self.application.statsd.close()
response = self.fetch('/status_code')
self.assertEqual(response.code, 200)
self.assertTrue(self.application.statsd._sock.closed())
def test_that_client_can_be_closed_multiple_times(self):
response = self.fetch('/status_code')
self.assertEqual(response.code, 200)
self.application.statsd.close()
response = self.fetch('/status_code')
self.assertEqual(response.code, 200)
self.assertTrue(self.application.statsd._sock.closed())
self.application.statsd.close()
response = self.fetch('/status_code')
self.assertEqual(response.code, 200)
self.assertTrue(self.application.statsd._sock.closed())
class TCPStatsdConfigurationTests(testing.AsyncHTTPTestCase):
def get_app(self):
self.application = web.Application([
web.url('/', examples.statsd.SimpleHandler),
web.url('/counters/(.*)/([.0-9]*)', CounterBumper),
])
return self.application
def setUp(self):
self.application = None
self.namespace = 'testing'
super().setUp()
self.statsd = FakeStatsdServer(self.io_loop, protocol='tcp')
statsd.install(self.application, **{'namespace': self.namespace,
'host': self.statsd.sockaddr[0],
'port': self.statsd.sockaddr[1],
'protocol': 'tcp',
'prepend_metric_type': False})
def test_that_http_method_call_is_recorded(self):
response = self.fetch('/')
self.assertEqual(response.code, 204)
expected = 'testing.SimpleHandler.GET.204'
for path, value, stat_type in self.statsd.find_metrics(expected, 'ms'):
assert_between(250.0, float(value), 500.0)
def test_that_counter_accepts_increment_value(self):
response = self.fetch('/counters/path/5', method='POST', body='')
self.assertEqual(response.code, 204)
prefix = 'testing.path'
for path, value, stat_type in self.statsd.find_metrics(prefix, 'c'):
self.assertEqual(int(value), 5)
class UDPStatsdMetricCollectionTests(testing.AsyncHTTPTestCase):
def get_app(self):
self.application = web.Application([
web.url('/', examples.statsd.SimpleHandler),
web.url('/counters/(.*)/([.0-9]*)', CounterBumper),
web.url('/status_code', DefaultStatusCode),
])
return self.application
def setUp(self):
self.application = None
self.namespace = 'testing'
super().setUp()
self.statsd = FakeStatsdServer(self.io_loop, protocol='udp')
statsd.install(self.application, **{'namespace': self.namespace,
'host': self.statsd.sockaddr[0],
'port': self.statsd.sockaddr[1],
'protocol': 'udp',
'prepend_metric_type': True})
def tearDown(self):
self.statsd.close()
super().tearDown()
@unittest.mock.patch.object(socket.socket, 'sendto')
def test_expected_counters_data_written(self, mock_sock):
path = ('foo', 'bar')
value = 500
metric_type = 'c'
expected = "{}:{}|{}".format('.'.join(
itertools.chain((self.namespace, 'counters'), path)),
value,
metric_type)
self.application.statsd.send(path, value, metric_type)
mock_sock.assert_called_once_with(
expected.encode(),
(self.statsd.sockaddr[0], self.statsd.sockaddr[1]))
@unittest.mock.patch.object(socket.socket, 'sendto')
def test_expected_timers_data_written(self, mock_sock):
path = ('foo', 'bar')
value = 500
metric_type = 'ms'
expected = "{}:{}|{}".format('.'.join(
itertools.chain((self.namespace, 'timers'), path)),
value,
metric_type)
self.application.statsd.send(path, value, metric_type)
mock_sock.assert_called_once_with(
expected.encode(),
(self.statsd.sockaddr[0], self.statsd.sockaddr[1]))
def test_udp_message_format(self):
expected = '{path}:{value}|{metric_type}'
self.assertEqual(self.application.statsd._msg_format, expected)
def test_that_http_method_call_is_recorded(self):
response = self.fetch('/')
self.assertEqual(response.code, 204)
expected = 'testing.timers.SimpleHandler.GET.204'
for path, value, stat_type in self.statsd.find_metrics(expected, 'ms'):
assert_between(250.0, float(value), 500.0)
def test_that_counter_increment_defaults_to_one(self):
response = self.fetch('/', method='POST', body='')
self.assertEqual(response.code, 204)
prefix = 'testing.counters.request.path'
for path, value, stat_type in self.statsd.find_metrics(prefix, 'c'):
self.assertEqual(int(value), 1)
def test_that_counter_accepts_increment_value(self):
response = self.fetch('/counters/path/5', method='POST', body='')
self.assertEqual(response.code, 204)
prefix = 'testing.counters.path'
for path, value, stat_type in self.statsd.find_metrics(prefix, 'c'):
self.assertEqual(int(value), 5)
def test_that_execution_timer_records_time_spent(self):
response = self.fetch('/counters/one.two.three/0.25')
self.assertEqual(response.code, 204)
prefix = 'testing.timers.one.two.three'
for path, value, stat_type in self.statsd.find_metrics(prefix, 'ms'):
assert_between(250.0, float(value), 300.0)
def test_that_add_metric_tag_is_ignored(self):
response = self.fetch('/',
headers={'Correlation-ID': 'does not matter'})
self.assertEqual(response.code, 204)
def test_that_status_code_is_used_when_not_explicitly_set(self):
response = self.fetch('/status_code')
self.assertEqual(response.code, 200)
expected = 'testing.timers.DefaultStatusCode.GET.200'
self.assertEqual(expected,
list(self.statsd.find_metrics(expected, 'ms'))[0][0])
def test_that_mixin_works_without_client(self):
self.application.statsd.close()
delattr(self.application, 'statsd')
response = self.fetch('/', method='POST', body='')
self.assertEqual(response.code, 204)
class UDPStatsdConfigurationTests(testing.AsyncHTTPTestCase):
def get_app(self):
self.application = web.Application([
web.url('/', examples.statsd.SimpleHandler),
web.url('/counters/(.*)/([.0-9]*)', CounterBumper),
])
return self.application
def setUp(self):
self.application = None
self.namespace = 'testing'
super().setUp()
self.statsd = FakeStatsdServer(self.io_loop, protocol='udp')
statsd.install(self.application, **{'namespace': self.namespace,
'host': self.statsd.sockaddr[0],
'port': self.statsd.sockaddr[1],
'protocol': 'udp',
'prepend_metric_type': False})
def tearDown(self):
self.statsd.close()
super().tearDown()
def test_that_http_method_call_is_recorded(self):
response = self.fetch('/')
self.assertEqual(response.code, 204)
expected = 'testing.SimpleHandler.GET.204'
for path, value, stat_type in self.statsd.find_metrics(expected, 'ms'):
assert_between(250.0, float(value), 500.0)
def test_that_counter_accepts_increment_value(self):
response = self.fetch('/counters/path/5', method='POST', body='')
self.assertEqual(response.code, 204)
prefix = 'testing.path'
for path, value, stat_type in self.statsd.find_metrics(prefix, 'c'):
self.assertEqual(int(value), 5)
class StatsdInstallationTests(unittest.TestCase):
def setUp(self):
self.application = web.Application([
web.url('/', examples.statsd.SimpleHandler),
])
def test_collecter_is_not_reinstalled(self):
self.assertTrue(statsd.install(self.application))
self.assertFalse(statsd.install(self.application))
def test_host_is_used(self):
statsd.install(self.application, **{'host': 'example.com'})
self.assertEqual(self.application.statsd._host, 'example.com')
def test_port_is_used(self):
statsd.install(self.application, **{'port': '8888'})
self.assertEqual(self.application.statsd._port, 8888)
def test_default_host_and_port_is_used(self):
statsd.install(self.application, **{'namespace': 'testing'})
self.assertEqual(self.application.statsd._host, '127.0.0.1')
self.assertEqual(self.application.statsd._port, 8125)