Condition in pytest fixture depending on some test-suite results

Imagine the following test-suite:

import pytest


@pytest.fixture(scope="session")
def global_resource():
    yield
    if ...:
        print("output generated by this resource.")


def test_foo():
    assert False


def test_bar(global_resource):
    assert True


def test_baz(global_resource):
    assert True

In my actual setup, global_resource starts a docker container that produces a ton of output. If a test that uses that fixture fails, I want to print that output. If none of the tests that use this fixture fail, I do not want to print it.

In other words:

Is there something that I can put into the condition after global_resource's yield in order to learn if I want to print or no? I am aware that at this point tests may still fail due to issues in their teardown, that is ok.

global_resource is in session scope, so you will have only the bottom line of the tests in request fixture, something like testsfailed=3, testscollected=6

You can use pytest_runtest_makereport hook in conftest.py to check every test

FAILED_GLOBAL_RESOURCE_TEST = False


@pytest.fixture(scope='session')
def global_resource():
    yield
    if FAILED_GLOBAL_RESOURCE_TEST :
        print('output generated by this resource.')


@pytest.hookimpl(hookwrapper=True)
def pytest_runtest_makereport(item, call):
    global FAILED_GLOBAL_RESOURCE_TEST 
    outcome = yield
    result = outcome.get_result()
    if result.failed and result.when == 'call' and 'global_resource' in item.fixturenames:
        FAILED_GLOBAL_RESOURCE_TEST = True

This will print the docker output only once, but if you wanted to print on every test failure you need only minor changes (keep the output from global_resource and use it in pytest_runtest_makereport).