Function test_no_brokenpipeerror_message

testing/acceptance_test.py:1456–1470

Ensure that the broken pipe error message is suppressed. In some Python versions, it reaches sys.unraisablehook, in others a BrokenPipeError exception is propagated, but either way it prints to stderr on shutdown, so checking nothing is printed is enough.

(pytester: Pytester)

    reason=class="st">"Windows raises `OSError: [Errno 22] Invalid argument` instead",
)
def test_no_brokenpipeerror_message(pytester: Pytester) -> None:
    class="st">"""Ensure that the broken pipe error message is suppressed.

    In some Python versions, it reaches sys.unraisablehook, in others
    a BrokenPipeError exception is propagated, but either way it prints
    to stderr on shutdown, so checking nothing is printed is enough.
    class="st">"""
    popen = pytester.popen((*pytester._getpytestargs(), class="st">"--help"))
    popen.stdout.close()
    ret = popen.wait()
    assert popen.stderr.read() == bclass="st">""
    assert ret == 1

    class="cm"># Cleanup.
    popen.stderr.close()


@pytest.mark.filterwarnings(class="st">"default")