nwb-linkml/nwb_linkml/tests/test_logging.py

from pathlib import Path

from nwb_linkml.logging import init_logger


def test_init_logger(capsys, tmp_path):
    """
    We should be able to
    - log to file and stdout
    - with separable levels
    """

    log_dir = Path(tmp_path) / "logs"
    log_dir.mkdir()
    log_file = log_dir / "nwb_linkml.test_logger.log"
    logger = init_logger(name="test_logger", log_dir=log_dir, level="INFO", file_level="WARNING")
    warn_msg = "Both loggers should show"
    logger.warning(warn_msg)

    # can't test for presence of string because logger can split lines depending on size of console
    # but there should be one WARNING in stdout
    captured = capsys.readouterr()
    assert "WARNING" in captured.out

    with open(log_file) as lfile:
        log_str = lfile.read()
    assert "WARNING" in log_str

    info_msg = "Now only stdout should show"
    logger.info(info_msg)
    captured = capsys.readouterr()
    assert "INFO" in captured.out
    with open(log_file) as lfile:
        log_str = lfile.read()
    assert "INFO" not in log_str