Pytest to Insert Caplog Fixture in Test Method
I Have the Following Test Class for Pytest: Class Testconnection(Asynctestcase): '''Integration Test''' @Gen_Test Def Test_Connecting_To_Server(Self)...
I have the following test class for pytest:
class TestConnection(AsyncTestCase):
'''Integration test'''
@gen_test
def test_connecting_to_server(self):
'''Connecting to the TCPserver'''
client = server = None
try:
sock, port = bind_unused_port()
with NullContext():
server = EchoServer()
server.add_socket(sock)
client = IOStream(socket.socket())
#### HERE I WANT TO HAVE THE caplog FIXTURE
with ExpectLog(app_log, '.*decode.*'):
yield client.connect(('localhost', port))
yield client.write(b'hello\n')
# yield client.read_until(b'\n')
yield gen.moment
assert False
finally:
if server is not None:
server.stop()
if client is not None:
client.close()
Within this class apparently ExpectLog is not working so after a day of digging around in pytest's documentation I found that there is this caplog fixture that you can have inserted in you methods in order to access the captured logs. It seems to work if I have a test function to which I add the caplog argument but how do I make the caplog fixture available within the methods of a test class like the one above?
1 Answer
Although you can't pass fixtures as parameters to unittest test methods, you can inject them as instance attributes. Example:
# spam.py
import logging
def eggs():
logging.getLogger().info('bacon')
Test for spam.eggs():
# test_spam.py
import logging
import unittest
import pytest
import spam
class SpamTest(unittest.TestCase):
@pytest.fixture(autouse=True)
def inject_fixtures(self, caplog):
self._caplog = caplog
def test_eggs(self):
with self._caplog.at_level(logging.INFO):
spam.eggs()
assert self._caplog.records[0].message == 'bacon'
Elena Rostova holds a Master's degree in Public Health Journalism. She covers groundbreaking medical research, holistic wellness trends, mental health awareness, and nutritional science.
