testing/web-platform/tests/tools/pytest/doc/en/example/costlysetup/conftest.py


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import pytest

@pytest.fixture("session")
def setup(request):
    setup = CostlySetup()
    request.addfinalizer(setup.finalize)
    return setup

class CostlySetup:
    def __init__(self):
        import time
        print ("performing costly setup")
        time.sleep(5)
        self.timecostly = 1

    def finalize(self):
        del self.timecostly