Function test_log_file_cli_fallback_options

testing/logging/test_reporting.py:1525–1581

Make sure that fallback values for log-file formats and level works.

(pytester: Pytester)

def test_log_file_cli_fallback_options(pytester: Pytester) -> None:
    """Make sure that fallback values for log-file formats and level works."""
    pytester.makepyfile(
        """
        import logging
        logger = logging.getLogger()

        def test_foo():
            logger.info('info text going to logger')
            logger.warning('warning text going to logger')
            logger.error('error text going to logger')

            assert 0
    """
    )
    log_file = str(pytester.path.joinpath("pytest.log"))
    result = pytester.runpytest(
        "--log-level=ERROR",
        "--log-format=%(asctime)s %(message)s",
        "--log-date-format=%H:%M",
        "--log-file=pytest.log",
    )
    assert result.ret == 1

    # The log file should only contain the error log messages
    # not the warning or info ones and the format and date format
    # should match the formats provided using --log-format and --log-date-format
    assert os.path.isfile(log_file)
    with open(log_file, encoding="utf-8") as rfh:
        contents = rfh.read()
        assert re.match(r"[0-9]{2}:[0-9]{2} error text going to logger\s*", contents)
        assert "info text going to logger" not in contents
        assert "warning text going to logger" not in contents
        assert "error text going to logger" in contents

    # Try with a different format and date format to make sure that the formats
    # are being used
    result = pytester.runpytest(
        "--log-level=ERROR",
        "--log-format=%(asctime)s : %(message)s",
        "--log-date-format=%H:%M:%S",
        "--log-file=pytest.log",
    )
    assert result.ret == 1

    # The log file should only contain the error log messages
    # not the warning or info ones and the format and date format
    # should match the formats provided using --log-format and --log-date-format
    assert os.path.isfile(log_file)
    with open(log_file, encoding="utf-8") as rfh:
        contents = rfh.read()
        assert re.match(
            r"[0-9]{2}:[0-9]{2}:[0-9]{2} : error text going to logger\s*", contents
        )
        assert "info text going to logger" not in contents
        assert "warning text going to logger" not in contents
        assert "error text going to logger" in contents