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"""Support for providing temporary directories to test functions."""
import os
import re
import tempfile
from pathlib import Path
from typing import Optional
import attr
import py
from .pathlib import ensure_reset_dir
from .pathlib import LOCK_TIMEOUT
from .pathlib import make_numbered_dir
from .pathlib import make_numbered_dir_with_cleanup
from _pytest.compat import final
from _pytest.config import Config
from _pytest.deprecated import check_ispytest
from _pytest.fixtures import fixture
from _pytest.fixtures import FixtureRequest
from _pytest.monkeypatch import MonkeyPatch
@final
@attr.s(init=False)
class TempPathFactory:
"""Factory for temporary directories under the common base temp directory.
The base directory can be configured using the ``--basetemp`` option.
"""
_given_basetemp = attr.ib(type=Optional[Path])
_trace = attr.ib()
_basetemp = attr.ib(type=Optional[Path])
def __init__(
self,
given_basetemp: Optional[Path],
trace,
basetemp: Optional[Path] = None,
*,
_ispytest: bool = False,
) -> None:
check_ispytest(_ispytest)
if given_basetemp is None:
self._given_basetemp = None
else:
# Use os.path.abspath() to get absolute path instead of resolve() as it
# does not work the same in all platforms (see #4427).
# Path.absolute() exists, but it is not public (see https://bugs.python.org/issue25012).
self._given_basetemp = Path(os.path.abspath(str(given_basetemp)))
self._trace = trace
self._basetemp = basetemp
@classmethod
def from_config(
cls,
config: Config,
*,
_ispytest: bool = False,
) -> "TempPathFactory":
"""Create a factory according to pytest configuration.
:meta private:
"""
check_ispytest(_ispytest)
return cls(
given_basetemp=config.option.basetemp,
trace=config.trace.get("tmpdir"),
_ispytest=True,
)
def _ensure_relative_to_basetemp(self, basename: str) -> str:
basename = os.path.normpath(basename)
if (self.getbasetemp() / basename).resolve().parent != self.getbasetemp():
raise ValueError(f"{basename} is not a normalized and relative path")
return basename
def mktemp(self, basename: str, numbered: bool = True) -> Path:
"""Create a new temporary directory managed by the factory.
:param basename:
Directory base name, must be a relative path.
:param numbered:
If ``True``, ensure the directory is unique by adding a numbered
suffix greater than any existing one: ``basename="foo-"`` and ``numbered=True``
means that this function will create directories named ``"foo-0"``,
``"foo-1"``, ``"foo-2"`` and so on.
:returns:
The path to the new directory.
"""
basename = self._ensure_relative_to_basetemp(basename)
if not numbered:
p = self.getbasetemp().joinpath(basename)
p.mkdir()
else:
p = make_numbered_dir(root=self.getbasetemp(), prefix=basename)
self._trace("mktemp", p)
return p
def getbasetemp(self) -> Path:
"""Return base temporary directory."""
if self._basetemp is not None:
return self._basetemp
if self._given_basetemp is not None:
basetemp = self._given_basetemp
ensure_reset_dir(basetemp)
basetemp = basetemp.resolve()
else:
from_env = os.environ.get("PYTEST_DEBUG_TEMPROOT")
temproot = Path(from_env or tempfile.gettempdir()).resolve()
user = get_user() or "unknown"
# use a sub-directory in the temproot to speed-up
# make_numbered_dir() call
rootdir = temproot.joinpath(f"pytest-of-{user}")
rootdir.mkdir(exist_ok=True)
basetemp = make_numbered_dir_with_cleanup(
prefix="pytest-", root=rootdir, keep=3, lock_timeout=LOCK_TIMEOUT
)
assert basetemp is not None, basetemp
self._basetemp = t = basetemp
self._trace("new basetemp", t)
return t
@final
@attr.s(init=False)
class TempdirFactory:
"""Backward comptibility wrapper that implements :class:``py.path.local``
for :class:``TempPathFactory``."""
_tmppath_factory = attr.ib(type=TempPathFactory)
def __init__(
self, tmppath_factory: TempPathFactory, *, _ispytest: bool = False
) -> None:
check_ispytest(_ispytest)
self._tmppath_factory = tmppath_factory
def mktemp(self, basename: str, numbered: bool = True) -> py.path.local:
"""Same as :meth:`TempPathFactory.mktemp`, but returns a ``py.path.local`` object."""
return py.path.local(self._tmppath_factory.mktemp(basename, numbered).resolve())
def getbasetemp(self) -> py.path.local:
"""Backward compat wrapper for ``_tmppath_factory.getbasetemp``."""
return py.path.local(self._tmppath_factory.getbasetemp().resolve())
def get_user() -> Optional[str]:
"""Return the current user name, or None if getuser() does not work
in the current environment (see #1010)."""
import getpass
try:
return getpass.getuser()
except (ImportError, KeyError):
return None
def pytest_configure(config: Config) -> None:
"""Create a TempdirFactory and attach it to the config object.
This is to comply with existing plugins which expect the handler to be
available at pytest_configure time, but ideally should be moved entirely
to the tmpdir_factory session fixture.
"""
mp = MonkeyPatch()
tmppath_handler = TempPathFactory.from_config(config, _ispytest=True)
t = TempdirFactory(tmppath_handler, _ispytest=True)
config._cleanup.append(mp.undo)
mp.setattr(config, "_tmp_path_factory", tmppath_handler, raising=False)
mp.setattr(config, "_tmpdirhandler", t, raising=False)
@fixture(scope="session")
def tmpdir_factory(request: FixtureRequest) -> TempdirFactory:
"""Return a :class:`_pytest.tmpdir.TempdirFactory` instance for the test session."""
# Set dynamically by pytest_configure() above.
return request.config._tmpdirhandler # type: ignore
@fixture(scope="session")
def tmp_path_factory(request: FixtureRequest) -> TempPathFactory:
"""Return a :class:`_pytest.tmpdir.TempPathFactory` instance for the test session."""
# Set dynamically by pytest_configure() above.
return request.config._tmp_path_factory # type: ignore
def _mk_tmp(request: FixtureRequest, factory: TempPathFactory) -> Path:
name = request.node.name
name = re.sub(r"[\W]", "_", name)
MAXVAL = 30
name = name[:MAXVAL]
return factory.mktemp(name, numbered=True)
@fixture
def tmpdir(tmp_path: Path) -> py.path.local:
"""Return a temporary directory path object which is unique to each test
function invocation, created as a sub directory of the base temporary
directory.
By default, a new base temporary directory is created each test session,
and old bases are removed after 3 sessions, to aid in debugging. If
``--basetemp`` is used then it is cleared each session. See :ref:`base
temporary directory`.
The returned object is a `py.path.local`_ path object.
.. _`py.path.local`: https://py.readthedocs.io/en/latest/path.html
"""
return py.path.local(tmp_path)
@fixture
def tmp_path(request: FixtureRequest, tmp_path_factory: TempPathFactory) -> Path:
"""Return a temporary directory path object which is unique to each test
function invocation, created as a sub directory of the base temporary
directory.
By default, a new base temporary directory is created each test session,
and old bases are removed after 3 sessions, to aid in debugging. If
``--basetemp`` is used then it is cleared each session. See :ref:`base
temporary directory`.
The returned object is a :class:`pathlib.Path` object.
"""
return _mk_tmp(request, tmp_path_factory)
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