Function test_log_file_mode_cli

testing/logging/test_reporting.py:667–704

(pytester: Pytester)

def test_log_file_mode_cli(pytester: Pytester) -> None:
    class="cm"># Default log file level
    pytester.makepyfile(
        class="st">"""
        import pytest
        import logging
        def test_log_file(request):
            plugin = request.config.pluginmanager.getplugin(&class="cm">#x27;logging-plugin')
            assert plugin.log_file_handler.level == logging.WARNING
            logging.getLogger(&class="cm">#x27;catchlogclass="st">').info("This log message won't be shown")
            logging.getLogger(&class="cm">#x27;catchlog').warning(class="st">"This log message will be shown")
            print(&class="cm">#x27;PASSED')
    class="st">"""
    )

    log_file = str(pytester.path.joinpath(class="st">"pytest.log"))

    with open(log_file, mode=class="st">"w", encoding=class="st">"utf-8") as wfh:
        wfh.write(class="st">"A custom header\n")

    result = pytester.runpytest(
        class="st">"-s",
        fclass="st">"--log-file={log_file}",
        class="st">"--log-file-mode=a",
        class="st">"--log-file-level=WARNING",
    )

    class="cm"># fnmatch_lines does an assertion internally
    result.stdout.fnmatch_lines([class="st">"test_log_file_mode_cli.py PASSED"])

    class="cm"># make sure that we get a class="st">'0' exit code for the testsuite
    assert result.ret == 0
    assert os.path.isfile(log_file)
    with open(log_file, encoding=class="st">"utf-8") as rfh:
        contents = rfh.read()
        assert class="st">"A custom header" in contents
        assert class="st">"This log message will be shown" in contents
        assert class="st">"This log message won&class="cm">#x27;t be shown" not in contents


def test_log_file_mode_cli_invalid(pytester: Pytester) -> None: