Function test_terminal_summary_warnings_header_once

testing/test_terminal.py:1658–1679

(pytester: Pytester)

@pytest.mark.filterwarnings("default::UserWarning")
def test_terminal_summary_warnings_header_once(pytester: Pytester) -> None:
    pytester.makepyfile(
        """
        def test_failure():
            import warnings
            warnings.warn("warning_from_" + "test")
            assert 0
    """
    )
    result = pytester.runpytest("-ra")
    result.stdout.fnmatch_lines(
        [
            "*= warnings summary =*",
            "*warning_from_test*",
            "*= short test summary info =*",
            "*== 1 failed, 1 warning in *",
        ]
    )
    result.stdout.no_fnmatch_line("*None*")
    stdout = result.stdout.str()
    assert stdout.count("warning_from_test") == 1
    assert stdout.count("=== warnings summary ") == 1


@pytest.mark.filterwarnings("default")