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'
