# Source code for _pytest.logging

    """Access and control log capturing."""
    import logging
    import os
    import re
    import sys
    from contextlib import contextmanager
    from io import StringIO
    from pathlib import Path
    from typing import AbstractSet
    from typing import Dict
    from typing import Generator
    from typing import List
    from typing import Mapping
    from typing import Optional
    from typing import Tuple
    from typing import TypeVar
    from typing import Union

    from _pytest import nodes
    from _pytest._io import TerminalWriter
    from _pytest.capture import CaptureManager
    from _pytest.compat import final
    from _pytest.compat import nullcontext
    from _pytest.config import _strtobool
    from _pytest.config import Config
    from _pytest.config import create_terminal_writer
    from _pytest.config import hookimpl
    from _pytest.config import UsageError
    from _pytest.config.argparsing import Parser
    from _pytest.deprecated import check_ispytest
    from _pytest.fixtures import fixture
    from _pytest.fixtures import FixtureRequest
    from _pytest.main import Session
    from _pytest.store import StoreKey
    from _pytest.terminal import TerminalReporter

    DEFAULT_LOG_FORMAT = "%(levelname)-8s %(name)s:%(filename)s:%(lineno)d %(message)s"
    DEFAULT_LOG_DATE_FORMAT = "%H:%M:%S"
    _ANSI_ESCAPE_SEQ = re.compile(r"\x1b\[[\d;]+m")
    caplog_handler_key = StoreKey["LogCaptureHandler"]()
    caplog_records_key = StoreKey[Dict[str, List[logging.LogRecord]]]()

    def _remove_ansi_escape_sequences(text: str) -> str:
        return _ANSI_ESCAPE_SEQ.sub("", text)

    class ColoredLevelFormatter(logging.Formatter):
        """A logging formatter which colorizes the %(levelname)..s part of the
        log format passed to __init__."""

        LOGLEVEL_COLOROPTS: Mapping[int, AbstractSet[str]] = {
            logging.CRITICAL: {"red"},
            logging.ERROR: {"red", "bold"},
            logging.WARNING: {"yellow"},
            logging.WARN: {"yellow"},
            logging.INFO: {"green"},
            logging.DEBUG: {"purple"},
            logging.NOTSET: set(),
        }
        LEVELNAME_FMT_REGEX = re.compile(r"%\(levelname\)([+-.]?\d*s)")

        def __init__(self, terminalwriter: TerminalWriter, *args, **kwargs) -> None:
            super().__init__(*args, **kwargs)
            self._original_fmt = self._style._fmt
            self._level_to_fmt_mapping: Dict[int, str] = {}

            assert self._fmt is not None
            levelname_fmt_match = self.LEVELNAME_FMT_REGEX.search(self._fmt)
            if not levelname_fmt_match:
                return
            levelname_fmt = levelname_fmt_match.group()

            for level, color_opts in self.LOGLEVEL_COLOROPTS.items():
                formatted_levelname = levelname_fmt % {
                    "levelname": logging.getLevelName(level)
                }

                # add ANSI escape sequences around the formatted levelname
                color_kwargs = {name: True for name in color_opts}
                colorized_formatted_levelname = terminalwriter.markup(
                    formatted_levelname, **color_kwargs
                )
                self._level_to_fmt_mapping[level] = self.LEVELNAME_FMT_REGEX.sub(
                    colorized_formatted_levelname, self._fmt
                )

        def format(self, record: logging.LogRecord) -> str:
            fmt = self._level_to_fmt_mapping.get(record.levelno, self._original_fmt)
            self._style._fmt = fmt
            return super().format(record)

    class PercentStyleMultiline(logging.PercentStyle):
        """A logging style with special support for multiline messages.

        If the message of a record consists of multiple lines, this style
        formats the message as if each line were logged separately.
        """

        def __init__(self, fmt: str, auto_indent: Union[int, str, bool, None]) -> None:
            super().__init__(fmt)
            self._auto_indent = self._get_auto_indent(auto_indent)

        @staticmethod
        def _update_message(
            record_dict: Dict[str, object], message: str
        ) -> Dict[str, object]:
            tmp = record_dict.copy()
            tmp["message"] = message
            return tmp

        @staticmethod
        def _get_auto_indent(auto_indent_option: Union[int, str, bool, None]) -> int:
            """Determine the current auto indentation setting.

            Specify auto indent behavior (on/off/fixed) by passing in
            extra={"auto_indent": [value]} to the call to logging.log() or
            using a --log-auto-indent [value] command line or the
            log_auto_indent [value] config option.

            Default behavior is auto-indent off.

            Using the string "True" or "on" or the boolean True as the value
            turns auto indent on, using the string "False" or "off" or the
            boolean False or the int 0 turns it off, and specifying a
            positive integer fixes the indentation position to the value
            specified.

            Any other values for the option are invalid, and will silently be
            converted to the default.

            :param None|bool|int|str auto_indent_option:
                User specified option for indentation from command line, config
                or extra kwarg. Accepts int, bool or str. str option accepts the
                same range of values as boolean config options, as well as
                positive integers represented in str form.

            :returns:
                Indentation value, which can be
                -1 (automatically determine indentation) or
                0 (auto-indent turned off) or
                >0 (explicitly set indentation position).
            """

            if auto_indent_option is None:
                return 0
            elif isinstance(auto_indent_option, bool):
                if auto_indent_option:
                    return -1
                else:
                    return 0
            elif isinstance(auto_indent_option, int):
                return int(auto_indent_option)
            elif isinstance(auto_indent_option, str):
                try:
                    return int(auto_indent_option)
                except ValueError:
                    pass
                try:
                    if _strtobool(auto_indent_option):
                        return -1
                except ValueError:
                    return 0

            return 0

        def format(self, record: logging.LogRecord) -> str:
            if "\n" in record.message:
                if hasattr(record, "auto_indent"):
                    # Passed in from the "extra={}" kwarg on the call to logging.log().
                    auto_indent = self._get_auto_indent(record.auto_indent)  # type: ignore[attr-defined]
                else:
                    auto_indent = self._auto_indent

                if auto_indent:
                    lines = record.message.splitlines()
                    formatted = self._fmt % self._update_message(record.__dict__, lines[0])

                    if auto_indent < 0:
                        indentation = _remove_ansi_escape_sequences(formatted).find(
                            lines[0]
                        )
                    else:
                        # Optimizes logging by allowing a fixed indentation.
                        indentation = auto_indent
                    lines[0] = formatted
                    return ("\n" + " " * indentation).join(lines)
            return self._fmt % record.__dict__

    def get_option_ini(config: Config, *names: str):
        for name in names:
            ret = config.getoption(name)  # 'default' arg won't work as expected
            if ret is None:
                ret = config.getini(name)
            if ret:
                return ret

    def pytest_addoption(parser: Parser) -> None:
        """Add options to control log capturing."""
        group = parser.getgroup("logging")

        def add_option_ini(option, dest, default=None, type=None, **kwargs):
            parser.addini(
                dest, default=default, type=type, help="default value for " + option
            )
            group.addoption(option, dest=dest, **kwargs)

        add_option_ini(
            "--log-level",
            dest="log_level",
            default=None,
            metavar="LEVEL",
            help=(
                "level of messages to catch/display.\n"
                "Not set by default, so it depends on the root/parent log handler's"
                ' effective level, where it is "WARNING" by default.'
            ),
        )
        add_option_ini(
            "--log-format",
            dest="log_format",
            default=DEFAULT_LOG_FORMAT,
            help="log format as used by the logging module.",
        )
        add_option_ini(
            "--log-date-format",
            dest="log_date_format",
            default=DEFAULT_LOG_DATE_FORMAT,
            help="log date format as used by the logging module.",
        )
        parser.addini(
            "log_cli",
            default=False,
            type="bool",
            help='enable log display during test run (also known as "live logging").',
        )
        add_option_ini(
            "--log-cli-level", dest="log_cli_level", default=None, help="cli logging level."
        )
        add_option_ini(
            "--log-cli-format",
            dest="log_cli_format",
            default=None,
            help="log format as used by the logging module.",
        )
        add_option_ini(
            "--log-cli-date-format",
            dest="log_cli_date_format",
            default=None,
            help="log date format as used by the logging module.",
        )
        add_option_ini(
            "--log-file",
            dest="log_file",
            default=None,
            help="path to a file when logging will be written to.",
        )
        add_option_ini(
            "--log-file-level",
            dest="log_file_level",
            default=None,
            help="log file logging level.",
        )
        add_option_ini(
            "--log-file-format",
            dest="log_file_format",
            default=DEFAULT_LOG_FORMAT,
            help="log format as used by the logging module.",
        )
        add_option_ini(
            "--log-file-date-format",
            dest="log_file_date_format",
            default=DEFAULT_LOG_DATE_FORMAT,
            help="log date format as used by the logging module.",
        )
        add_option_ini(
            "--log-auto-indent",
            dest="log_auto_indent",
            default=None,
            help="Auto-indent multiline messages passed to the logging module. Accepts true|on, false|off or an integer.",
        )

    _HandlerType = TypeVar("_HandlerType", bound=logging.Handler)

    # Not using @contextmanager for performance reasons.
    class catching_logs:
        """Context manager that prepares the whole logging machinery properly."""

        __slots__ = ("handler", "level", "orig_level")

        def __init__(self, handler: _HandlerType, level: Optional[int] = None) -> None:
            self.handler = handler
            self.level = level

        def __enter__(self):
            root_logger = logging.getLogger()
            if self.level is not None:
                self.handler.setLevel(self.level)
            root_logger.addHandler(self.handler)
            if self.level is not None:
                self.orig_level = root_logger.level
                root_logger.setLevel(min(self.orig_level, self.level))
            return self.handler

        def __exit__(self, type, value, traceback):
            root_logger = logging.getLogger()
            if self.level is not None:
                root_logger.setLevel(self.orig_level)
            root_logger.removeHandler(self.handler)

    class LogCaptureHandler(logging.StreamHandler):
        """A logging handler that stores log records and the log text."""

        stream: StringIO

        def __init__(self) -> None:
            """Create a new log handler."""
            super().__init__(StringIO())
            self.records: List[logging.LogRecord] = []

        def emit(self, record: logging.LogRecord) -> None:
            """Keep the log records in a list in addition to the log text."""
            self.records.append(record)
            super().emit(record)

        def reset(self) -> None:
            self.records = []
            self.stream = StringIO()

        def handleError(self, record: logging.LogRecord) -> None:
            if logging.raiseExceptions:
                # Fail the test if the log message is bad (emit failed).
                # The default behavior of logging is to print "Logging error"
                # to stderr with the call stack and some extra details.
                # pytest wants to make such mistakes visible during testing.
                raise

    @final
    class LogCaptureFixture:
        """Provides access and control of log capturing."""

        def __init__(self, item: nodes.Node, *, _ispytest: bool = False) -> None:
            check_ispytest(_ispytest)
            self._item = item
            self._initial_handler_level: Optional[int] = None
            # Dict of log name -> log level.
            self._initial_logger_levels: Dict[Optional[str], int] = {}

        def _finalize(self) -> None:
            """Finalize the fixture.

            This restores the log levels changed by :meth:`set_level`.
            """
            # Restore log levels.
            if self._initial_handler_level is not None:
                self.handler.setLevel(self._initial_handler_level)
            for logger_name, level in self._initial_logger_levels.items():
                logger = logging.getLogger(logger_name)
                logger.setLevel(level)

        @property
        def handler(self) -> LogCaptureHandler:
            """Get the logging handler used by the fixture.

            :rtype: LogCaptureHandler
            """
            return self._item._store[caplog_handler_key]

        def get_records(self, when: str) -> List[logging.LogRecord]:
            """Get the logging records for one of the possible test phases.

            :param str when:
                Which test phase to obtain the records from. Valid values are: "setup", "call" and "teardown".

            :returns: The list of captured records at the given stage.
            :rtype: List[logging.LogRecord]

            .. versionadded:: 3.4
            """
            return self._item._store[caplog_records_key].get(when, [])

        @property
        def text(self) -> str:
            """The formatted log text."""
            return _remove_ansi_escape_sequences(self.handler.stream.getvalue())

        @property
        def records(self) -> List[logging.LogRecord]:
            """The list of log records."""
            return self.handler.records

        @property
        def record_tuples(self) -> List[Tuple[str, int, str]]:
            """A list of a stripped down version of log records intended
            for use in assertion comparison.

            The format of the tuple is:

                (logger_name, log_level, message)
            """
            return [(r.name, r.levelno, r.getMessage()) for r in self.records]

        @property
        def messages(self) -> List[str]:
            """A list of format-interpolated log messages.

            Unlike 'records', which contains the format string and parameters for
            interpolation, log messages in this list are all interpolated.

            Unlike 'text', which contains the output from the handler, log
            messages in this list are unadorned with levels, timestamps, etc,
            making exact comparisons more reliable.

            Note that traceback or stack info (from :func:`logging.exception` or
            the `exc_info` or `stack_info` arguments to the logging functions) is
            not included, as this is added by the formatter in the handler.

            .. versionadded:: 3.7
            """
            return [r.getMessage() for r in self.records]

        def clear(self) -> None:
            """Reset the list of log records and the captured log text."""
            self.handler.reset()

        def set_level(self, level: Union[int, str], logger: Optional[str] = None) -> None:
            """Set the level of a logger for the duration of a test.

            .. versionchanged:: 3.4
                The levels of the loggers changed by this function will be
                restored to their initial values at the end of the test.

            :param int level: The level.
            :param str logger: The logger to update. If not given, the root logger.
            """
            logger_obj = logging.getLogger(logger)
            # Save the original log-level to restore it during teardown.
            self._initial_logger_levels.setdefault(logger, logger_obj.level)
            logger_obj.setLevel(level)
            if self._initial_handler_level is None:
                self._initial_handler_level = self.handler.level
            self.handler.setLevel(level)

        @contextmanager
        def at_level(
            self, level: int, logger: Optional[str] = None
        ) -> Generator[None, None, None]:
            """Context manager that sets the level for capturing of logs. After
            the end of the 'with' statement the level is restored to its original
            value.

            :param int level: The level.
            :param str logger: The logger to update. If not given, the root logger.
            """
            logger_obj = logging.getLogger(logger)
            orig_level = logger_obj.level
            logger_obj.setLevel(level)
            handler_orig_level = self.handler.level
            self.handler.setLevel(level)
            try:
                yield
            finally:
                logger_obj.setLevel(orig_level)
                self.handler.setLevel(handler_orig_level)

    @fixture
    def caplog(request: FixtureRequest) -> Generator[LogCaptureFixture, None, None]:
        """Access and control log capturing.

        Captured logs are available through the following properties/methods::

        * caplog.messages        -> list of format-interpolated log messages
        * caplog.text            -> string containing formatted log output
        * caplog.records         -> list of logging.LogRecord instances
        * caplog.record_tuples   -> list of (logger_name, level, message) tuples
        * caplog.clear()         -> clear captured records and formatted log output string
        """
        result = LogCaptureFixture(request.node, _ispytest=True)
        yield result
        result._finalize()

    def get_log_level_for_setting(config: Config, *setting_names: str) -> Optional[int]:
        for setting_name in setting_names:
            log_level = config.getoption(setting_name)
            if log_level is None:
                log_level = config.getini(setting_name)
            if log_level:
                break
        else:
            return None

        if isinstance(log_level, str):
            log_level = log_level.upper()
        try:
            return int(getattr(logging, log_level, log_level))
        except ValueError as e:
            # Python logging does not recognise this as a logging level
            raise UsageError(
                "'{}' is not recognized as a logging level name for "
                "'{}'. Please consider passing the "
                "logging level num instead.".format(log_level, setting_name)
            ) from e

    # run after terminalreporter/capturemanager are configured
    @hookimpl(trylast=True)
    def pytest_configure(config: Config) -> None:
        config.pluginmanager.register(LoggingPlugin(config), "logging-plugin")

    class LoggingPlugin:
        """Attaches to the logging module and captures log messages for each test."""

        def __init__(self, config: Config) -> None:
            """Create a new plugin to capture log messages.

            The formatter can be safely shared across all handlers so
            create a single one for the entire test session here.
            """
            self._config = config

            # Report logging.
            self.formatter = self._create_formatter(
                get_option_ini(config, "log_format"),
                get_option_ini(config, "log_date_format"),
                get_option_ini(config, "log_auto_indent"),
            )
            self.log_level = get_log_level_for_setting(config, "log_level")
            self.caplog_handler = LogCaptureHandler()
            self.caplog_handler.setFormatter(self.formatter)
            self.report_handler = LogCaptureHandler()
            self.report_handler.setFormatter(self.formatter)

            # File logging.
            self.log_file_level = get_log_level_for_setting(config, "log_file_level")
            log_file = get_option_ini(config, "log_file") or os.devnull
            if log_file != os.devnull:
                directory = os.path.dirname(os.path.abspath(log_file))
                if not os.path.isdir(directory):
                    os.makedirs(directory)

            self.log_file_handler = _FileHandler(log_file, mode="w", encoding="UTF-8")
            log_file_format = get_option_ini(config, "log_file_format", "log_format")
            log_file_date_format = get_option_ini(
                config, "log_file_date_format", "log_date_format"
            )

            log_file_formatter = logging.Formatter(
                log_file_format, datefmt=log_file_date_format
            )
            self.log_file_handler.setFormatter(log_file_formatter)

            # CLI/live logging.
            self.log_cli_level = get_log_level_for_setting(
                config, "log_cli_level", "log_level"
            )
            if self._log_cli_enabled():
                terminal_reporter = config.pluginmanager.get_plugin("terminalreporter")
                capture_manager = config.pluginmanager.get_plugin("capturemanager")
                # if capturemanager plugin is disabled, live logging still works.
                self.log_cli_handler: Union[
                    _LiveLoggingStreamHandler, _LiveLoggingNullHandler
                ] = _LiveLoggingStreamHandler(terminal_reporter, capture_manager)
            else:
                self.log_cli_handler = _LiveLoggingNullHandler()
            log_cli_formatter = self._create_formatter(
                get_option_ini(config, "log_cli_format", "log_format"),
                get_option_ini(config, "log_cli_date_format", "log_date_format"),
                get_option_ini(config, "log_auto_indent"),
            )
            self.log_cli_handler.setFormatter(log_cli_formatter)

        def _create_formatter(self, log_format, log_date_format, auto_indent):
            # Color option doesn't exist if terminal plugin is disabled.
            color = getattr(self._config.option, "color", "no")
            if color != "no" and ColoredLevelFormatter.LEVELNAME_FMT_REGEX.search(
                log_format
            ):
                formatter: logging.Formatter = ColoredLevelFormatter(
                    create_terminal_writer(self._config), log_format, log_date_format
                )
            else:
                formatter = logging.Formatter(log_format, log_date_format)

            formatter._style = PercentStyleMultiline(
                formatter._style._fmt, auto_indent=auto_indent
            )

            return formatter

        def set_log_path(self, fname: str) -> None:
            """Set the filename parameter for Logging.FileHandler().

            Creates parent directory if it does not exist.

            .. warning::
                This is an experimental API.
            """
            fpath = Path(fname)

            if not fpath.is_absolute():
                fpath = self._config.rootpath / fpath

            if not fpath.parent.exists():
                fpath.parent.mkdir(exist_ok=True, parents=True)

            stream = fpath.open(mode="w", encoding="UTF-8")
            if sys.version_info >= (3, 7):
                old_stream = self.log_file_handler.setStream(stream)
            else:
                old_stream = self.log_file_handler.stream
                self.log_file_handler.acquire()
                try:
                    self.log_file_handler.flush()
                    self.log_file_handler.stream = stream
                finally:
                    self.log_file_handler.release()
            if old_stream:
                old_stream.close()

        def _log_cli_enabled(self):
            """Return whether live logging is enabled."""
            enabled = self._config.getoption(
                "--log-cli-level"
            ) is not None or self._config.getini("log_cli")
            if not enabled:
                return False

            terminal_reporter = self._config.pluginmanager.get_plugin("terminalreporter")
            if terminal_reporter is None:
                # terminal reporter is disabled e.g. by pytest-xdist.
                return False

            return True

        @hookimpl(hookwrapper=True, tryfirst=True)
        def pytest_sessionstart(self) -> Generator[None, None, None]:
            self.log_cli_handler.set_when("sessionstart")

            with catching_logs(self.log_cli_handler, level=self.log_cli_level):
                with catching_logs(self.log_file_handler, level=self.log_file_level):
                    yield

        @hookimpl(hookwrapper=True, tryfirst=True)
        def pytest_collection(self) -> Generator[None, None, None]:
            self.log_cli_handler.set_when("collection")

            with catching_logs(self.log_cli_handler, level=self.log_cli_level):
                with catching_logs(self.log_file_handler, level=self.log_file_level):
                    yield

        @hookimpl(hookwrapper=True)
        def pytest_runtestloop(self, session: Session) -> Generator[None, None, None]:
            if session.config.option.collectonly:
                yield
                return

            if self._log_cli_enabled() and self._config.getoption("verbose") < 1:
                # The verbose flag is needed to avoid messy test progress output.
                self._config.option.verbose = 1

            with catching_logs(self.log_cli_handler, level=self.log_cli_level):
                with catching_logs(self.log_file_handler, level=self.log_file_level):
                    yield  # Run all the tests.

        @hookimpl
        def pytest_runtest_logstart(self) -> None:
            self.log_cli_handler.reset()
            self.log_cli_handler.set_when("start")

        @hookimpl
        def pytest_runtest_logreport(self) -> None:
            self.log_cli_handler.set_when("logreport")

        def _runtest_for(self, item: nodes.Item, when: str) -> Generator[None, None, None]:
            """Implement the internals of the pytest_runtest_xxx() hooks."""
            with catching_logs(
                self.caplog_handler, level=self.log_level,
            ) as caplog_handler, catching_logs(
                self.report_handler, level=self.log_level,
            ) as report_handler:
                caplog_handler.reset()
                report_handler.reset()
                item._store[caplog_records_key][when] = caplog_handler.records
                item._store[caplog_handler_key] = caplog_handler

                yield

                log = report_handler.stream.getvalue().strip()
                item.add_report_section(when, "log", log)

        @hookimpl(hookwrapper=True)
        def pytest_runtest_setup(self, item: nodes.Item) -> Generator[None, None, None]:
            self.log_cli_handler.set_when("setup")

            empty: Dict[str, List[logging.LogRecord]] = {}
            item._store[caplog_records_key] = empty
            yield from self._runtest_for(item, "setup")

        @hookimpl(hookwrapper=True)
        def pytest_runtest_call(self, item: nodes.Item) -> Generator[None, None, None]:
            self.log_cli_handler.set_when("call")

            yield from self._runtest_for(item, "call")

        @hookimpl(hookwrapper=True)
        def pytest_runtest_teardown(self, item: nodes.Item) -> Generator[None, None, None]:
            self.log_cli_handler.set_when("teardown")

            yield from self._runtest_for(item, "teardown")
            del item._store[caplog_records_key]
            del item._store[caplog_handler_key]

        @hookimpl
        def pytest_runtest_logfinish(self) -> None:
            self.log_cli_handler.set_when("finish")

        @hookimpl(hookwrapper=True, tryfirst=True)
        def pytest_sessionfinish(self) -> Generator[None, None, None]:
            self.log_cli_handler.set_when("sessionfinish")

            with catching_logs(self.log_cli_handler, level=self.log_cli_level):
                with catching_logs(self.log_file_handler, level=self.log_file_level):
                    yield

        @hookimpl
        def pytest_unconfigure(self) -> None:
            # Close the FileHandler explicitly.
            # (logging.shutdown might have lost the weakref?!)
            self.log_file_handler.close()

    class _FileHandler(logging.FileHandler):
        """A logging FileHandler with pytest tweaks."""

        def handleError(self, record: logging.LogRecord) -> None:
            # Handled by LogCaptureHandler.
            pass

    class _LiveLoggingStreamHandler(logging.StreamHandler):
        """A logging StreamHandler used by the live logging feature: it will
        write a newline before the first log message in each test.

        During live logging we must also explicitly disable stdout/stderr
        capturing otherwise it will get captured and won't appear in the
        terminal.
        """

        # Officially stream needs to be a IO[str], but TerminalReporter
        # isn't. So force it.
        stream: TerminalReporter = None  # type: ignore

        def __init__(
            self,
            terminal_reporter: TerminalReporter,
            capture_manager: Optional[CaptureManager],
        ) -> None:
            logging.StreamHandler.__init__(self, stream=terminal_reporter)  # type: ignore[arg-type]
            self.capture_manager = capture_manager
            self.reset()
            self.set_when(None)
            self._test_outcome_written = False

        def reset(self) -> None:
            """Reset the handler; should be called before the start of each test."""
            self._first_record_emitted = False

        def set_when(self, when: Optional[str]) -> None:
            """Prepare for the given test phase (setup/call/teardown)."""
            self._when = when
            self._section_name_shown = False
            if when == "start":
                self._test_outcome_written = False

        def emit(self, record: logging.LogRecord) -> None:
            ctx_manager = (
                self.capture_manager.global_and_fixture_disabled()
                if self.capture_manager
                else nullcontext()
            )
            with ctx_manager:
                if not self._first_record_emitted:
                    self.stream.write("\n")
                    self._first_record_emitted = True
                elif self._when in ("teardown", "finish"):
                    if not self._test_outcome_written:
                        self._test_outcome_written = True
                        self.stream.write("\n")
                if not self._section_name_shown and self._when:
                    self.stream.section("live log " + self._when, sep="-", bold=True)
                    self._section_name_shown = True
                super().emit(record)

        def handleError(self, record: logging.LogRecord) -> None:
            # Handled by LogCaptureHandler.
            pass

    class _LiveLoggingNullHandler(logging.NullHandler):
        """A logging handler used when live logging is disabled."""

        def reset(self) -> None:
            pass

        def set_when(self, when: str) -> None:
            pass

        def handleError(self, record: logging.LogRecord) -> None:
            # Handled by LogCaptureHandler.
            pass