"""Command line options, ini-file and conftest.py processing."""
import argparse
import collections.abc
import copy
import enum
import inspect
import os
import re
import shlex
import sys
import types
import warnings
from functools import lru_cache
from pathlib import Path
from textwrap import dedent
from types import TracebackType
from typing import Any
from typing import Callable
from typing import cast
from typing import Dict
from typing import Generator
from typing import IO
from typing import Iterable
from typing import Iterator
from typing import List
from typing import Optional
from typing import Sequence
from typing import Set
from typing import TextIO
from typing import Tuple
from typing import Type
from typing import TYPE_CHECKING
from typing import Union
import attr
from pluggy import HookimplMarker
from pluggy import HookspecMarker
from pluggy import PluginManager
import _pytest._code
import _pytest.deprecated
import _pytest.hookspec
from .exceptions import PrintHelp as PrintHelp
from .exceptions import UsageError as UsageError
from .findpaths import determine_setup
from _pytest._code import ExceptionInfo
from _pytest._code import filter_traceback
from _pytest._io import TerminalWriter
from _pytest.compat import final
from _pytest.compat import importlib_metadata
from _pytest.outcomes import fail
from _pytest.outcomes import Skipped
from _pytest.pathlib import absolutepath
from _pytest.pathlib import bestrelpath
from _pytest.pathlib import import_path
from _pytest.pathlib import ImportMode
from _pytest.pathlib import resolve_package_path
from _pytest.stash import Stash
from _pytest.warning_types import PytestConfigWarning
if TYPE_CHECKING:
from _pytest._code.code import _TracebackStyle
from _pytest.terminal import TerminalReporter
from .argparsing import Argument
_PluggyPlugin = object
"""A type to represent plugin objects.
Plugins can be any namespace, so we can't narrow it down much, but we use an
alias to make the intent clear.
Ideally this type would be provided by pluggy itself.
"""
hookimpl = HookimplMarker("pytest")
hookspec = HookspecMarker("pytest")
[文档]@final
class ExitCode(enum.IntEnum):
"""Encodes the valid exit codes by pytest.
Currently users and plugins may supply other exit codes as well.
.. versionadded:: 5.0
"""
#: Tests passed.
OK = 0
#: Tests failed.
TESTS_FAILED = 1
#: pytest was interrupted.
INTERRUPTED = 2
#: An internal error got in the way.
INTERNAL_ERROR = 3
#: pytest was misused.
USAGE_ERROR = 4
#: pytest couldn't find tests.
NO_TESTS_COLLECTED = 5
class ConftestImportFailure(Exception):
def __init__(
self,
path: Path,
excinfo: Tuple[Type[Exception], Exception, TracebackType],
) -> None:
super().__init__(path, excinfo)
self.path = path
self.excinfo = excinfo
def __str__(self) -> str:
return "{}: {} (from {})".format(
self.excinfo[0].__name__, self.excinfo[1], self.path
)
def filter_traceback_for_conftest_import_failure(
entry: _pytest._code.TracebackEntry,
) -> bool:
"""Filter tracebacks entries which point to pytest internals or importlib.
Make a special case for importlib because we use it to import test modules and conftest files
in _pytest.pathlib.import_path.
"""
return filter_traceback(entry) and "importlib" not in str(entry.path).split(os.sep)
[文档]def main(
args: Optional[Union[List[str], "os.PathLike[str]"]] = None,
plugins: Optional[Sequence[Union[str, _PluggyPlugin]]] = None,
) -> Union[int, ExitCode]:
"""Perform an in-process test run.
:param args: List of command line arguments.
:param plugins: List of plugin objects to be auto-registered during initialization.
:returns: An exit code.
"""
try:
try:
config = _prepareconfig(args, plugins)
except ConftestImportFailure as e:
exc_info = ExceptionInfo.from_exc_info(e.excinfo)
tw = TerminalWriter(sys.stderr)
tw.line(f"ImportError while loading conftest '{e.path}'.", red=True)
exc_info.traceback = exc_info.traceback.filter(
filter_traceback_for_conftest_import_failure
)
exc_repr = (
exc_info.getrepr(style="short", chain=False)
if exc_info.traceback
else exc_info.exconly()
)
formatted_tb = str(exc_repr)
for line in formatted_tb.splitlines():
tw.line(line.rstrip(), red=True)
return ExitCode.USAGE_ERROR
else:
try:
ret: Union[ExitCode, int] = config.hook.pytest_cmdline_main(
config=config
)
try:
return ExitCode(ret)
except ValueError:
return ret
finally:
config._ensure_unconfigure()
except UsageError as e:
tw = TerminalWriter(sys.stderr)
for msg in e.args:
tw.line(f"ERROR: {msg}\n", red=True)
return ExitCode.USAGE_ERROR
def console_main() -> int:
"""The CLI entry point of pytest.
This function is not meant for programmable use; use `main()` instead.
"""
# https://docs.python.org/3/library/signal.html#note-on-sigpipe
try:
code = main()
sys.stdout.flush()
return code
except BrokenPipeError:
# Python flushes standard streams on exit; redirect remaining output
# to devnull to avoid another BrokenPipeError at shutdown
devnull = os.open(os.devnull, os.O_WRONLY)
os.dup2(devnull, sys.stdout.fileno())
return 1 # Python exits with error code 1 on EPIPE
class cmdline: # compatibility namespace
main = staticmethod(main)
def filename_arg(path: str, optname: str) -> str:
"""Argparse type validator for filename arguments.
:path: Path of filename.
:optname: Name of the option.
"""
if os.path.isdir(path):
raise UsageError(f"{optname} must be a filename, given: {path}")
return path
def directory_arg(path: str, optname: str) -> str:
"""Argparse type validator for directory arguments.
:path: Path of directory.
:optname: Name of the option.
"""
if not os.path.isdir(path):
raise UsageError(f"{optname} must be a directory, given: {path}")
return path
# Plugins that cannot be disabled via "-p no:X" currently.
essential_plugins = (
"mark",
"main",
"runner",
"fixtures",
"helpconfig", # Provides -p.
)
default_plugins = essential_plugins + (
"python",
"terminal",
"debugging",
"unittest",
"capture",
"skipping",
"legacypath",
"tmpdir",
"monkeypatch",
"recwarn",
"pastebin",
"nose",
"assertion",
"junitxml",
"doctest",
"cacheprovider",
"freeze_support",
"setuponly",
"setupplan",
"stepwise",
"warnings",
"logging",
"reports",
"python_path",
*(["unraisableexception", "threadexception"] if sys.version_info >= (3, 8) else []),
"faulthandler",
)
builtin_plugins = set(default_plugins)
builtin_plugins.add("pytester")
builtin_plugins.add("pytester_assertions")
def get_config(
args: Optional[List[str]] = None,
plugins: Optional[Sequence[Union[str, _PluggyPlugin]]] = None,
) -> "Config":
# subsequent calls to main will create a fresh instance
pluginmanager = PytestPluginManager()
config = Config(
pluginmanager,
invocation_params=Config.InvocationParams(
args=args or (),
plugins=plugins,
dir=Path.cwd(),
),
)
if args is not None:
# Handle any "-p no:plugin" args.
pluginmanager.consider_preparse(args, exclude_only=True)
for spec in default_plugins:
pluginmanager.import_plugin(spec)
return config
def get_plugin_manager() -> "PytestPluginManager":
"""Obtain a new instance of the
:py:class:`pytest.PytestPluginManager`, with default plugins
already loaded.
This function can be used by integration with other tools, like hooking
into pytest to run tests into an IDE.
"""
return get_config().pluginmanager
def _prepareconfig(
args: Optional[Union[List[str], "os.PathLike[str]"]] = None,
plugins: Optional[Sequence[Union[str, _PluggyPlugin]]] = None,
) -> "Config":
if args is None:
args = sys.argv[1:]
elif isinstance(args, os.PathLike):
args = [os.fspath(args)]
elif not isinstance(args, list):
msg = "`args` parameter expected to be a list of strings, got: {!r} (type: {})"
raise TypeError(msg.format(args, type(args)))
config = get_config(args, plugins)
pluginmanager = config.pluginmanager
try:
if plugins:
for plugin in plugins:
if isinstance(plugin, str):
pluginmanager.consider_pluginarg(plugin)
else:
pluginmanager.register(plugin)
config = pluginmanager.hook.pytest_cmdline_parse(
pluginmanager=pluginmanager, args=args
)
return config
except BaseException:
config._ensure_unconfigure()
raise
def _get_directory(path: Path) -> Path:
"""Get the directory of a path - itself if already a directory."""
if path.is_file():
return path.parent
else:
return path
[文档]@final
class PytestPluginManager(PluginManager):
"""A :py:class:`pluggy.PluginManager <pluggy.PluginManager>` with
additional pytest-specific functionality:
* Loading plugins from the command line, ``PYTEST_PLUGINS`` env variable and
``pytest_plugins`` global variables found in plugins being loaded.
* ``conftest.py`` loading during start-up.
"""
def __init__(self) -> None:
import _pytest.assertion
super().__init__("pytest")
# -- State related to local conftest plugins.
# All loaded conftest modules.
self._conftest_plugins: Set[types.ModuleType] = set()
# All conftest modules applicable for a directory.
# This includes the directory's own conftest modules as well
# as those of its parent directories.
self._dirpath2confmods: Dict[Path, List[types.ModuleType]] = {}
# Cutoff directory above which conftests are no longer discovered.
self._confcutdir: Optional[Path] = None
# If set, conftest loading is skipped.
self._noconftest = False
# _getconftestmodules()'s call to _get_directory() causes a stat
# storm when it's called potentially thousands of times in a test
# session (#9478), often with the same path, so cache it.
self._get_directory = lru_cache(256)(_get_directory)
self._duplicatepaths: Set[Path] = set()
# plugins that were explicitly skipped with pytest.skip
# list of (module name, skip reason)
# previously we would issue a warning when a plugin was skipped, but
# since we refactored warnings as first citizens of Config, they are
# just stored here to be used later.
self.skipped_plugins: List[Tuple[str, str]] = []
self.add_hookspecs(_pytest.hookspec)
self.register(self)
if os.environ.get("PYTEST_DEBUG"):
err: IO[str] = sys.stderr
encoding: str = getattr(err, "encoding", "utf8")
try:
err = open(
os.dup(err.fileno()),
mode=err.mode,
buffering=1,
encoding=encoding,
)
except Exception:
pass
self.trace.root.setwriter(err.write)
self.enable_tracing()
# Config._consider_importhook will set a real object if required.
self.rewrite_hook = _pytest.assertion.DummyRewriteHook()
# Used to know when we are importing conftests after the pytest_configure stage.
self._configured = False
[文档] def parse_hookimpl_opts(self, plugin: _PluggyPlugin, name: str):
# pytest hooks are always prefixed with "pytest_",
# so we avoid accessing possibly non-readable attributes
# (see issue #1073).
if not name.startswith("pytest_"):
return
# Ignore names which can not be hooks.
if name == "pytest_plugins":
return
method = getattr(plugin, name)
opts = super().parse_hookimpl_opts(plugin, name)
# Consider only actual functions for hooks (#3775).
if not inspect.isroutine(method):
return
# Collect unmarked hooks as long as they have the `pytest_' prefix.
if opts is None and name.startswith("pytest_"):
opts = {}
if opts is not None:
# TODO: DeprecationWarning, people should use hookimpl
# https://github.com/pytest-dev/pytest/issues/4562
known_marks = {m.name for m in getattr(method, "pytestmark", [])}
for name in ("tryfirst", "trylast", "optionalhook", "hookwrapper"):
opts.setdefault(name, hasattr(method, name) or name in known_marks)
return opts
[文档] def parse_hookspec_opts(self, module_or_class, name: str):
opts = super().parse_hookspec_opts(module_or_class, name)
if opts is None:
method = getattr(module_or_class, name)
if name.startswith("pytest_"):
# todo: deprecate hookspec hacks
# https://github.com/pytest-dev/pytest/issues/4562
known_marks = {m.name for m in getattr(method, "pytestmark", [])}
opts = {
"firstresult": hasattr(method, "firstresult")
or "firstresult" in known_marks,
"historic": hasattr(method, "historic")
or "historic" in known_marks,
}
return opts
[文档] def register(
self, plugin: _PluggyPlugin, name: Optional[str] = None
) -> Optional[str]:
if name in _pytest.deprecated.DEPRECATED_EXTERNAL_PLUGINS:
warnings.warn(
PytestConfigWarning(
"{} plugin has been merged into the core, "
"please remove it from your requirements.".format(
name.replace("_", "-")
)
)
)
return None
ret: Optional[str] = super().register(plugin, name)
if ret:
self.hook.pytest_plugin_registered.call_historic(
kwargs=dict(plugin=plugin, manager=self)
)
if isinstance(plugin, types.ModuleType):
self.consider_module(plugin)
return ret
[文档] def getplugin(self, name: str):
# Support deprecated naming because plugins (xdist e.g.) use it.
plugin: Optional[_PluggyPlugin] = self.get_plugin(name)
return plugin
[文档] def hasplugin(self, name: str) -> bool:
"""Return whether a plugin with the given name is registered."""
return bool(self.get_plugin(name))
def pytest_configure(self, config: "Config") -> None:
""":meta private:"""
# XXX now that the pluginmanager exposes hookimpl(tryfirst...)
# we should remove tryfirst/trylast as markers.
config.addinivalue_line(
"markers",
"tryfirst: mark a hook implementation function such that the "
"plugin machinery will try to call it first/as early as possible.",
)
config.addinivalue_line(
"markers",
"trylast: mark a hook implementation function such that the "
"plugin machinery will try to call it last/as late as possible.",
)
self._configured = True
#
# Internal API for local conftest plugin handling.
#
def _set_initial_conftests(
self, namespace: argparse.Namespace, rootpath: Path
) -> None:
"""Load initial conftest files given a preparsed "namespace".
As conftest files may add their own command line options which have
arguments ('--my-opt somepath') we might get some false positives.
All builtin and 3rd party plugins will have been loaded, however, so
common options will not confuse our logic here.
"""
current = Path.cwd()
self._confcutdir = (
absolutepath(current / namespace.confcutdir)
if namespace.confcutdir
else None
)
self._noconftest = namespace.noconftest
self._using_pyargs = namespace.pyargs
testpaths = namespace.file_or_dir
foundanchor = False
for testpath in testpaths:
path = str(testpath)
# remove node-id syntax
i = path.find("::")
if i != -1:
path = path[:i]
anchor = absolutepath(current / path)
if anchor.exists(): # we found some file object
self._try_load_conftest(anchor, namespace.importmode, rootpath)
foundanchor = True
if not foundanchor:
self._try_load_conftest(current, namespace.importmode, rootpath)
def _is_in_confcutdir(self, path: Path) -> bool:
"""Whether a path is within the confcutdir.
When false, should not load conftest.
"""
if self._confcutdir is None:
return True
return path not in self._confcutdir.parents
def _try_load_conftest(
self, anchor: Path, importmode: Union[str, ImportMode], rootpath: Path
) -> None:
self._getconftestmodules(anchor, importmode, rootpath)
# let's also consider test* subdirs
if anchor.is_dir():
for x in anchor.glob("test*"):
if x.is_dir():
self._getconftestmodules(x, importmode, rootpath)
def _getconftestmodules(
self, path: Path, importmode: Union[str, ImportMode], rootpath: Path
) -> Sequence[types.ModuleType]:
if self._noconftest:
return []
directory = self._get_directory(path)
# Optimization: avoid repeated searches in the same directory.
# Assumes always called with same importmode and rootpath.
existing_clist = self._dirpath2confmods.get(directory)
if existing_clist is not None:
return existing_clist
# XXX these days we may rather want to use config.rootpath
# and allow users to opt into looking into the rootdir parent
# directories instead of requiring to specify confcutdir.
clist = []
for parent in reversed((directory, *directory.parents)):
if self._is_in_confcutdir(parent):
conftestpath = parent / "conftest.py"
if conftestpath.is_file():
mod = self._importconftest(conftestpath, importmode, rootpath)
clist.append(mod)
self._dirpath2confmods[directory] = clist
return clist
def _rget_with_confmod(
self,
name: str,
path: Path,
importmode: Union[str, ImportMode],
rootpath: Path,
) -> Tuple[types.ModuleType, Any]:
modules = self._getconftestmodules(path, importmode, rootpath=rootpath)
for mod in reversed(modules):
try:
return mod, getattr(mod, name)
except AttributeError:
continue
raise KeyError(name)
def _importconftest(
self, conftestpath: Path, importmode: Union[str, ImportMode], rootpath: Path
) -> types.ModuleType:
existing = self.get_plugin(str(conftestpath))
if existing is not None:
return cast(types.ModuleType, existing)
pkgpath = resolve_package_path(conftestpath)
if pkgpath is None:
_ensure_removed_sysmodule(conftestpath.stem)
try:
mod = import_path(conftestpath, mode=importmode, root=rootpath)
except Exception as e:
assert e.__traceback__ is not None
exc_info = (type(e), e, e.__traceback__)
raise ConftestImportFailure(conftestpath, exc_info) from e
self._check_non_top_pytest_plugins(mod, conftestpath)
self._conftest_plugins.add(mod)
dirpath = conftestpath.parent
if dirpath in self._dirpath2confmods:
for path, mods in self._dirpath2confmods.items():
if dirpath in path.parents or path == dirpath:
assert mod not in mods
mods.append(mod)
self.trace(f"loading conftestmodule {mod!r}")
self.consider_conftest(mod)
return mod
def _check_non_top_pytest_plugins(
self,
mod: types.ModuleType,
conftestpath: Path,
) -> None:
if (
hasattr(mod, "pytest_plugins")
and self._configured
and not self._using_pyargs
):
msg = (
"Defining 'pytest_plugins' in a non-top-level conftest is no longer supported:\n"
"It affects the entire test suite instead of just below the conftest as expected.\n"
" {}\n"
"Please move it to a top level conftest file at the rootdir:\n"
" {}\n"
"For more information, visit:\n"
" https://docs.pytest.org/en/stable/deprecations.html#pytest-plugins-in-non-top-level-conftest-files"
)
fail(msg.format(conftestpath, self._confcutdir), pytrace=False)
#
# API for bootstrapping plugin loading
#
#
def consider_preparse(
self, args: Sequence[str], *, exclude_only: bool = False
) -> None:
""":meta private:"""
i = 0
n = len(args)
while i < n:
opt = args[i]
i += 1
if isinstance(opt, str):
if opt == "-p":
try:
parg = args[i]
except IndexError:
return
i += 1
elif opt.startswith("-p"):
parg = opt[2:]
else:
continue
if exclude_only and not parg.startswith("no:"):
continue
self.consider_pluginarg(parg)
def consider_pluginarg(self, arg: str) -> None:
""":meta private:"""
if arg.startswith("no:"):
name = arg[3:]
if name in essential_plugins:
raise UsageError("plugin %s cannot be disabled" % name)
# PR #4304: remove stepwise if cacheprovider is blocked.
if name == "cacheprovider":
self.set_blocked("stepwise")
self.set_blocked("pytest_stepwise")
self.set_blocked(name)
if not name.startswith("pytest_"):
self.set_blocked("pytest_" + name)
else:
name = arg
# Unblock the plugin. None indicates that it has been blocked.
# There is no interface with pluggy for this.
if self._name2plugin.get(name, -1) is None:
del self._name2plugin[name]
if not name.startswith("pytest_"):
if self._name2plugin.get("pytest_" + name, -1) is None:
del self._name2plugin["pytest_" + name]
self.import_plugin(arg, consider_entry_points=True)
def consider_conftest(self, conftestmodule: types.ModuleType) -> None:
""":meta private:"""
self.register(conftestmodule, name=conftestmodule.__file__)
def consider_env(self) -> None:
""":meta private:"""
self._import_plugin_specs(os.environ.get("PYTEST_PLUGINS"))
def consider_module(self, mod: types.ModuleType) -> None:
""":meta private:"""
self._import_plugin_specs(getattr(mod, "pytest_plugins", []))
def _import_plugin_specs(
self, spec: Union[None, types.ModuleType, str, Sequence[str]]
) -> None:
plugins = _get_plugin_specs_as_list(spec)
for import_spec in plugins:
self.import_plugin(import_spec)
[文档] def import_plugin(self, modname: str, consider_entry_points: bool = False) -> None:
"""Import a plugin with ``modname``.
If ``consider_entry_points`` is True, entry point names are also
considered to find a plugin.
"""
# Most often modname refers to builtin modules, e.g. "pytester",
# "terminal" or "capture". Those plugins are registered under their
# basename for historic purposes but must be imported with the
# _pytest prefix.
assert isinstance(modname, str), (
"module name as text required, got %r" % modname
)
if self.is_blocked(modname) or self.get_plugin(modname) is not None:
return
importspec = "_pytest." + modname if modname in builtin_plugins else modname
self.rewrite_hook.mark_rewrite(importspec)
if consider_entry_points:
loaded = self.load_setuptools_entrypoints("pytest11", name=modname)
if loaded:
return
try:
__import__(importspec)
except ImportError as e:
raise ImportError(
f'Error importing plugin "{modname}": {e.args[0]}'
).with_traceback(e.__traceback__) from e
except Skipped as e:
self.skipped_plugins.append((modname, e.msg or ""))
else:
mod = sys.modules[importspec]
self.register(mod, modname)
def _get_plugin_specs_as_list(
specs: Union[None, types.ModuleType, str, Sequence[str]]
) -> List[str]:
"""Parse a plugins specification into a list of plugin names."""
# None means empty.
if specs is None:
return []
# Workaround for #3899 - a submodule which happens to be called "pytest_plugins".
if isinstance(specs, types.ModuleType):
return []
# Comma-separated list.
if isinstance(specs, str):
return specs.split(",") if specs else []
# Direct specification.
if isinstance(specs, collections.abc.Sequence):
return list(specs)
raise UsageError(
"Plugins may be specified as a sequence or a ','-separated string of plugin names. Got: %r"
% specs
)
def _ensure_removed_sysmodule(modname: str) -> None:
try:
del sys.modules[modname]
except KeyError:
pass
class Notset:
def __repr__(self):
return "<NOTSET>"
notset = Notset()
def _iter_rewritable_modules(package_files: Iterable[str]) -> Iterator[str]:
"""Given an iterable of file names in a source distribution, return the "names" that should
be marked for assertion rewrite.
For example the package "pytest_mock/__init__.py" should be added as "pytest_mock" in
the assertion rewrite mechanism.
This function has to deal with dist-info based distributions and egg based distributions
(which are still very much in use for "editable" installs).
Here are the file names as seen in a dist-info based distribution:
pytest_mock/__init__.py
pytest_mock/_version.py
pytest_mock/plugin.py
pytest_mock.egg-info/PKG-INFO
Here are the file names as seen in an egg based distribution:
src/pytest_mock/__init__.py
src/pytest_mock/_version.py
src/pytest_mock/plugin.py
src/pytest_mock.egg-info/PKG-INFO
LICENSE
setup.py
We have to take in account those two distribution flavors in order to determine which
names should be considered for assertion rewriting.
More information:
https://github.com/pytest-dev/pytest-mock/issues/167
"""
package_files = list(package_files)
seen_some = False
for fn in package_files:
is_simple_module = "/" not in fn and fn.endswith(".py")
is_package = fn.count("/") == 1 and fn.endswith("__init__.py")
if is_simple_module:
module_name, _ = os.path.splitext(fn)
# we ignore "setup.py" at the root of the distribution
# as well as editable installation finder modules made by setuptools
if module_name != "setup" and not module_name.startswith("__editable__"):
seen_some = True
yield module_name
elif is_package:
package_name = os.path.dirname(fn)
seen_some = True
yield package_name
if not seen_some:
# At this point we did not find any packages or modules suitable for assertion
# rewriting, so we try again by stripping the first path component (to account for
# "src" based source trees for example).
# This approach lets us have the common case continue to be fast, as egg-distributions
# are rarer.
new_package_files = []
for fn in package_files:
parts = fn.split("/")
new_fn = "/".join(parts[1:])
if new_fn:
new_package_files.append(new_fn)
if new_package_files:
yield from _iter_rewritable_modules(new_package_files)
def _args_converter(args: Iterable[str]) -> Tuple[str, ...]:
return tuple(args)
[文档]@final
class Config:
"""Access to configuration values, pluginmanager and plugin hooks.
:param PytestPluginManager pluginmanager:
A pytest PluginManager.
:param InvocationParams invocation_params:
Object containing parameters regarding the :func:`pytest.main`
invocation.
"""
[文档] @final
@attr.s(frozen=True, auto_attribs=True)
class InvocationParams:
"""Holds parameters passed during :func:`pytest.main`.
The object attributes are read-only.
.. versionadded:: 5.1
.. note::
Note that the environment variable ``PYTEST_ADDOPTS`` and the ``addopts``
ini option are handled by pytest, not being included in the ``args`` attribute.
Plugins accessing ``InvocationParams`` must be aware of that.
"""
args: Tuple[str, ...] = attr.ib(converter=_args_converter)
"""The command-line arguments as passed to :func:`pytest.main`."""
plugins: Optional[Sequence[Union[str, _PluggyPlugin]]]
"""Extra plugins, might be `None`."""
dir: Path
"""The directory from which :func:`pytest.main` was invoked."""
def __init__(
self,
pluginmanager: PytestPluginManager,
*,
invocation_params: Optional[InvocationParams] = None,
) -> None:
from .argparsing import Parser, FILE_OR_DIR
if invocation_params is None:
invocation_params = self.InvocationParams(
args=(), plugins=None, dir=Path.cwd()
)
self.option = argparse.Namespace()
"""Access to command line option as attributes.
:type: argparse.Namespace
"""
self.invocation_params = invocation_params
"""The parameters with which pytest was invoked.
:type: InvocationParams
"""
_a = FILE_OR_DIR
self._parser = Parser(
usage=f"%(prog)s [options] [{_a}] [{_a}] [...]",
processopt=self._processopt,
_ispytest=True,
)
self.pluginmanager = pluginmanager
"""The plugin manager handles plugin registration and hook invocation.
:type: PytestPluginManager
"""
self.stash = Stash()
"""A place where plugins can store information on the config for their
own use.
:type: Stash
"""
# Deprecated alias. Was never public. Can be removed in a few releases.
self._store = self.stash
from .compat import PathAwareHookProxy
self.trace = self.pluginmanager.trace.root.get("config")
self.hook = PathAwareHookProxy(self.pluginmanager.hook)
self._inicache: Dict[str, Any] = {}
self._override_ini: Sequence[str] = ()
self._opt2dest: Dict[str, str] = {}
self._cleanup: List[Callable[[], None]] = []
self.pluginmanager.register(self, "pytestconfig")
self._configured = False
self.hook.pytest_addoption.call_historic(
kwargs=dict(parser=self._parser, pluginmanager=self.pluginmanager)
)
if TYPE_CHECKING:
from _pytest.cacheprovider import Cache
self.cache: Optional[Cache] = None
@property
def rootpath(self) -> Path:
"""The path to the :ref:`rootdir <rootdir>`.
:type: pathlib.Path
.. versionadded:: 6.1
"""
return self._rootpath
@property
def inipath(self) -> Optional[Path]:
"""The path to the :ref:`configfile <configfiles>`.
:type: Optional[pathlib.Path]
.. versionadded:: 6.1
"""
return self._inipath
[文档] def add_cleanup(self, func: Callable[[], None]) -> None:
"""Add a function to be called when the config object gets out of
use (usually coinciding with pytest_unconfigure)."""
self._cleanup.append(func)
def _do_configure(self) -> None:
assert not self._configured
self._configured = True
with warnings.catch_warnings():
warnings.simplefilter("default")
self.hook.pytest_configure.call_historic(kwargs=dict(config=self))
def _ensure_unconfigure(self) -> None:
if self._configured:
self._configured = False
self.hook.pytest_unconfigure(config=self)
self.hook.pytest_configure._call_history = []
while self._cleanup:
fin = self._cleanup.pop()
fin()
def get_terminal_writer(self) -> TerminalWriter:
terminalreporter: TerminalReporter = self.pluginmanager.get_plugin(
"terminalreporter"
)
return terminalreporter._tw
def pytest_cmdline_parse(
self, pluginmanager: PytestPluginManager, args: List[str]
) -> "Config":
try:
self.parse(args)
except UsageError:
# Handle --version and --help here in a minimal fashion.
# This gets done via helpconfig normally, but its
# pytest_cmdline_main is not called in case of errors.
if getattr(self.option, "version", False) or "--version" in args:
from _pytest.helpconfig import showversion
showversion(self)
elif (
getattr(self.option, "help", False) or "--help" in args or "-h" in args
):
self._parser._getparser().print_help()
sys.stdout.write(
"\nNOTE: displaying only minimal help due to UsageError.\n\n"
)
raise
return self
def notify_exception(
self,
excinfo: ExceptionInfo[BaseException],
option: Optional[argparse.Namespace] = None,
) -> None:
if option and getattr(option, "fulltrace", False):
style: _TracebackStyle = "long"
else:
style = "native"
excrepr = excinfo.getrepr(
funcargs=True, showlocals=getattr(option, "showlocals", False), style=style
)
res = self.hook.pytest_internalerror(excrepr=excrepr, excinfo=excinfo)
if not any(res):
for line in str(excrepr).split("\n"):
sys.stderr.write("INTERNALERROR> %s\n" % line)
sys.stderr.flush()
def cwd_relative_nodeid(self, nodeid: str) -> str:
# nodeid's are relative to the rootpath, compute relative to cwd.
if self.invocation_params.dir != self.rootpath:
fullpath = self.rootpath / nodeid
nodeid = bestrelpath(self.invocation_params.dir, fullpath)
return nodeid
[文档] @classmethod
def fromdictargs(cls, option_dict, args) -> "Config":
"""Constructor usable for subprocesses."""
config = get_config(args)
config.option.__dict__.update(option_dict)
config.parse(args, addopts=False)
for x in config.option.plugins:
config.pluginmanager.consider_pluginarg(x)
return config
def _processopt(self, opt: "Argument") -> None:
for name in opt._short_opts + opt._long_opts:
self._opt2dest[name] = opt.dest
if hasattr(opt, "default"):
if not hasattr(self.option, opt.dest):
setattr(self.option, opt.dest, opt.default)
@hookimpl(trylast=True)
def pytest_load_initial_conftests(self, early_config: "Config") -> None:
self.pluginmanager._set_initial_conftests(
early_config.known_args_namespace, rootpath=early_config.rootpath
)
def _initini(self, args: Sequence[str]) -> None:
ns, unknown_args = self._parser.parse_known_and_unknown_args(
args, namespace=copy.copy(self.option)
)
rootpath, inipath, inicfg = determine_setup(
ns.inifilename,
ns.file_or_dir + unknown_args,
rootdir_cmd_arg=ns.rootdir or None,
config=self,
)
self._rootpath = rootpath
self._inipath = inipath
self.inicfg = inicfg
self._parser.extra_info["rootdir"] = str(self.rootpath)
self._parser.extra_info["inifile"] = str(self.inipath)
self._parser.addini("addopts", "extra command line options", "args")
self._parser.addini("minversion", "minimally required pytest version")
self._parser.addini(
"required_plugins",
"plugins that must be present for pytest to run",
type="args",
default=[],
)
self._override_ini = ns.override_ini or ()
def _consider_importhook(self, args: Sequence[str]) -> None:
"""Install the PEP 302 import hook if using assertion rewriting.
Needs to parse the --assert=<mode> option from the commandline
and find all the installed plugins to mark them for rewriting
by the importhook.
"""
ns, unknown_args = self._parser.parse_known_and_unknown_args(args)
mode = getattr(ns, "assertmode", "plain")
if mode == "rewrite":
import _pytest.assertion
try:
hook = _pytest.assertion.install_importhook(self)
except SystemError:
mode = "plain"
else:
self._mark_plugins_for_rewrite(hook)
self._warn_about_missing_assertion(mode)
def _mark_plugins_for_rewrite(self, hook) -> None:
"""Given an importhook, mark for rewrite any top-level
modules or packages in the distribution package for
all pytest plugins."""
self.pluginmanager.rewrite_hook = hook
if os.environ.get("PYTEST_DISABLE_PLUGIN_AUTOLOAD"):
# We don't autoload from setuptools entry points, no need to continue.
return
package_files = (
str(file)
for dist in importlib_metadata.distributions()
if any(ep.group == "pytest11" for ep in dist.entry_points)
for file in dist.files or []
)
for name in _iter_rewritable_modules(package_files):
hook.mark_rewrite(name)
def _validate_args(self, args: List[str], via: str) -> List[str]:
"""Validate known args."""
self._parser._config_source_hint = via # type: ignore
try:
self._parser.parse_known_and_unknown_args(
args, namespace=copy.copy(self.option)
)
finally:
del self._parser._config_source_hint # type: ignore
return args
def _preparse(self, args: List[str], addopts: bool = True) -> None:
if addopts:
env_addopts = os.environ.get("PYTEST_ADDOPTS", "")
if len(env_addopts):
args[:] = (
self._validate_args(shlex.split(env_addopts), "via PYTEST_ADDOPTS")
+ args
)
self._initini(args)
if addopts:
args[:] = (
self._validate_args(self.getini("addopts"), "via addopts config") + args
)
self.known_args_namespace = self._parser.parse_known_args(
args, namespace=copy.copy(self.option)
)
self._checkversion()
self._consider_importhook(args)
self.pluginmanager.consider_preparse(args, exclude_only=False)
if not os.environ.get("PYTEST_DISABLE_PLUGIN_AUTOLOAD"):
# Don't autoload from setuptools entry point. Only explicitly specified
# plugins are going to be loaded.
self.pluginmanager.load_setuptools_entrypoints("pytest11")
self.pluginmanager.consider_env()
self.known_args_namespace = self._parser.parse_known_args(
args, namespace=copy.copy(self.known_args_namespace)
)
self._validate_plugins()
self._warn_about_skipped_plugins()
if self.known_args_namespace.strict:
self.issue_config_time_warning(
_pytest.deprecated.STRICT_OPTION, stacklevel=2
)
if self.known_args_namespace.confcutdir is None and self.inipath is not None:
confcutdir = str(self.inipath.parent)
self.known_args_namespace.confcutdir = confcutdir
try:
self.hook.pytest_load_initial_conftests(
early_config=self, args=args, parser=self._parser
)
except ConftestImportFailure as e:
if self.known_args_namespace.help or self.known_args_namespace.version:
# we don't want to prevent --help/--version to work
# so just let is pass and print a warning at the end
self.issue_config_time_warning(
PytestConfigWarning(f"could not load initial conftests: {e.path}"),
stacklevel=2,
)
else:
raise
@hookimpl(hookwrapper=True)
def pytest_collection(self) -> Generator[None, None, None]:
# Validate invalid ini keys after collection is done so we take in account
# options added by late-loading conftest files.
yield
self._validate_config_options()
def _checkversion(self) -> None:
import pytest
minver = self.inicfg.get("minversion", None)
if minver:
# Imported lazily to improve start-up time.
from packaging.version import Version
if not isinstance(minver, str):
raise pytest.UsageError(
"%s: 'minversion' must be a single value" % self.inipath
)
if Version(minver) > Version(pytest.__version__):
raise pytest.UsageError(
"%s: 'minversion' requires pytest-%s, actual pytest-%s'"
% (
self.inipath,
minver,
pytest.__version__,
)
)
def _validate_config_options(self) -> None:
for key in sorted(self._get_unknown_ini_keys()):
self._warn_or_fail_if_strict(f"Unknown config option: {key}\n")
def _validate_plugins(self) -> None:
required_plugins = sorted(self.getini("required_plugins"))
if not required_plugins:
return
# Imported lazily to improve start-up time.
from packaging.version import Version
from packaging.requirements import InvalidRequirement, Requirement
plugin_info = self.pluginmanager.list_plugin_distinfo()
plugin_dist_info = {dist.project_name: dist.version for _, dist in plugin_info}
missing_plugins = []
for required_plugin in required_plugins:
try:
req = Requirement(required_plugin)
except InvalidRequirement:
missing_plugins.append(required_plugin)
continue
if req.name not in plugin_dist_info:
missing_plugins.append(required_plugin)
elif not req.specifier.contains(
Version(plugin_dist_info[req.name]), prereleases=True
):
missing_plugins.append(required_plugin)
if missing_plugins:
raise UsageError(
"Missing required plugins: {}".format(", ".join(missing_plugins)),
)
def _warn_or_fail_if_strict(self, message: str) -> None:
if self.known_args_namespace.strict_config:
raise UsageError(message)
self.issue_config_time_warning(PytestConfigWarning(message), stacklevel=3)
def _get_unknown_ini_keys(self) -> List[str]:
parser_inicfg = self._parser._inidict
return [name for name in self.inicfg if name not in parser_inicfg]
def parse(self, args: List[str], addopts: bool = True) -> None:
# Parse given cmdline arguments into this config object.
assert not hasattr(
self, "args"
), "can only parse cmdline args at most once per Config object"
self.hook.pytest_addhooks.call_historic(
kwargs=dict(pluginmanager=self.pluginmanager)
)
self._preparse(args, addopts=addopts)
# XXX deprecated hook:
self.hook.pytest_cmdline_preparse(config=self, args=args)
self._parser.after_preparse = True # type: ignore
try:
args = self._parser.parse_setoption(
args, self.option, namespace=self.option
)
if not args:
if self.invocation_params.dir == self.rootpath:
args = self.getini("testpaths")
if not args:
args = [str(self.invocation_params.dir)]
self.args = args
except PrintHelp:
pass
[文档] def issue_config_time_warning(self, warning: Warning, stacklevel: int) -> None:
"""Issue and handle a warning during the "configure" stage.
During ``pytest_configure`` we can't capture warnings using the ``catch_warnings_for_item``
function because it is not possible to have hookwrappers around ``pytest_configure``.
This function is mainly intended for plugins that need to issue warnings during
``pytest_configure`` (or similar stages).
:param warning: The warning instance.
:param stacklevel: stacklevel forwarded to warnings.warn.
"""
if self.pluginmanager.is_blocked("warnings"):
return
cmdline_filters = self.known_args_namespace.pythonwarnings or []
config_filters = self.getini("filterwarnings")
with warnings.catch_warnings(record=True) as records:
warnings.simplefilter("always", type(warning))
apply_warning_filters(config_filters, cmdline_filters)
warnings.warn(warning, stacklevel=stacklevel)
if records:
frame = sys._getframe(stacklevel - 1)
location = frame.f_code.co_filename, frame.f_lineno, frame.f_code.co_name
self.hook.pytest_warning_recorded.call_historic(
kwargs=dict(
warning_message=records[0],
when="config",
nodeid="",
location=location,
)
)
[文档] def addinivalue_line(self, name: str, line: str) -> None:
"""Add a line to an ini-file option. The option must have been
declared but might not yet be set in which case the line becomes
the first line in its value."""
x = self.getini(name)
assert isinstance(x, list)
x.append(line) # modifies the cached list inline
[文档] def getini(self, name: str):
"""Return configuration value from an :ref:`ini file <configfiles>`.
If the specified name hasn't been registered through a prior
:func:`parser.addini <pytest.Parser.addini>` call (usually from a
plugin), a ValueError is raised.
"""
try:
return self._inicache[name]
except KeyError:
self._inicache[name] = val = self._getini(name)
return val
# Meant for easy monkeypatching by legacypath plugin.
# Can be inlined back (with no cover removed) once legacypath is gone.
def _getini_unknown_type(self, name: str, type: str, value: Union[str, List[str]]):
msg = f"unknown configuration type: {type}"
raise ValueError(msg, value) # pragma: no cover
def _getini(self, name: str):
try:
description, type, default = self._parser._inidict[name]
except KeyError as e:
raise ValueError(f"unknown configuration value: {name!r}") from e
override_value = self._get_override_ini_value(name)
if override_value is None:
try:
value = self.inicfg[name]
except KeyError:
if default is not None:
return default
if type is None:
return ""
return []
else:
value = override_value
# Coerce the values based on types.
#
# Note: some coercions are only required if we are reading from .ini files, because
# the file format doesn't contain type information, but when reading from toml we will
# get either str or list of str values (see _parse_ini_config_from_pyproject_toml).
# For example:
#
# ini:
# a_line_list = "tests acceptance"
# in this case, we need to split the string to obtain a list of strings.
#
# toml:
# a_line_list = ["tests", "acceptance"]
# in this case, we already have a list ready to use.
#
if type == "paths":
# TODO: This assert is probably not valid in all cases.
assert self.inipath is not None
dp = self.inipath.parent
input_values = shlex.split(value) if isinstance(value, str) else value
return [dp / x for x in input_values]
elif type == "args":
return shlex.split(value) if isinstance(value, str) else value
elif type == "linelist":
if isinstance(value, str):
return [t for t in map(lambda x: x.strip(), value.split("\n")) if t]
else:
return value
elif type == "bool":
return _strtobool(str(value).strip())
elif type == "string":
return value
elif type is None:
return value
else:
return self._getini_unknown_type(name, type, value)
def _getconftest_pathlist(
self, name: str, path: Path, rootpath: Path
) -> Optional[List[Path]]:
try:
mod, relroots = self.pluginmanager._rget_with_confmod(
name, path, self.getoption("importmode"), rootpath
)
except KeyError:
return None
assert mod.__file__ is not None
modpath = Path(mod.__file__).parent
values: List[Path] = []
for relroot in relroots:
if isinstance(relroot, os.PathLike):
relroot = Path(relroot)
else:
relroot = relroot.replace("/", os.sep)
relroot = absolutepath(modpath / relroot)
values.append(relroot)
return values
def _get_override_ini_value(self, name: str) -> Optional[str]:
value = None
# override_ini is a list of "ini=value" options.
# Always use the last item if multiple values are set for same ini-name,
# e.g. -o foo=bar1 -o foo=bar2 will set foo to bar2.
for ini_config in self._override_ini:
try:
key, user_ini_value = ini_config.split("=", 1)
except ValueError as e:
raise UsageError(
"-o/--override-ini expects option=value style (got: {!r}).".format(
ini_config
)
) from e
else:
if key == name:
value = user_ini_value
return value
[文档] def getoption(self, name: str, default=notset, skip: bool = False):
"""Return command line option value.
:param name: Name of the option. You may also specify
the literal ``--OPT`` option instead of the "dest" option name.
:param default: Default value if no option of that name exists.
:param skip: If True, raise pytest.skip if option does not exists
or has a None value.
"""
name = self._opt2dest.get(name, name)
try:
val = getattr(self.option, name)
if val is None and skip:
raise AttributeError(name)
return val
except AttributeError as e:
if default is not notset:
return default
if skip:
import pytest
pytest.skip(f"no {name!r} option found")
raise ValueError(f"no option named {name!r}") from e
[文档] def getvalue(self, name: str, path=None):
"""Deprecated, use getoption() instead."""
return self.getoption(name)
[文档] def getvalueorskip(self, name: str, path=None):
"""Deprecated, use getoption(skip=True) instead."""
return self.getoption(name, skip=True)
def _warn_about_missing_assertion(self, mode: str) -> None:
if not _assertion_supported():
if mode == "plain":
warning_text = (
"ASSERTIONS ARE NOT EXECUTED"
" and FAILING TESTS WILL PASS. Are you"
" using python -O?"
)
else:
warning_text = (
"assertions not in test modules or"
" plugins will be ignored"
" because assert statements are not executed "
"by the underlying Python interpreter "
"(are you using python -O?)\n"
)
self.issue_config_time_warning(
PytestConfigWarning(warning_text),
stacklevel=3,
)
def _warn_about_skipped_plugins(self) -> None:
for module_name, msg in self.pluginmanager.skipped_plugins:
self.issue_config_time_warning(
PytestConfigWarning(f"skipped plugin {module_name!r}: {msg}"),
stacklevel=2,
)
def _assertion_supported() -> bool:
try:
assert False
except AssertionError:
return True
else:
return False # type: ignore[unreachable]
def create_terminal_writer(
config: Config, file: Optional[TextIO] = None
) -> TerminalWriter:
"""Create a TerminalWriter instance configured according to the options
in the config object.
Every code which requires a TerminalWriter object and has access to a
config object should use this function.
"""
tw = TerminalWriter(file=file)
if config.option.color == "yes":
tw.hasmarkup = True
elif config.option.color == "no":
tw.hasmarkup = False
if config.option.code_highlight == "yes":
tw.code_highlight = True
elif config.option.code_highlight == "no":
tw.code_highlight = False
return tw
def _strtobool(val: str) -> bool:
"""Convert a string representation of truth to True or False.
True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values
are 'n', 'no', 'f', 'false', 'off', and '0'. Raises ValueError if
'val' is anything else.
.. note:: Copied from distutils.util.
"""
val = val.lower()
if val in ("y", "yes", "t", "true", "on", "1"):
return True
elif val in ("n", "no", "f", "false", "off", "0"):
return False
else:
raise ValueError(f"invalid truth value {val!r}")
@lru_cache(maxsize=50)
def parse_warning_filter(
arg: str, *, escape: bool
) -> Tuple["warnings._ActionKind", str, Type[Warning], str, int]:
"""Parse a warnings filter string.
This is copied from warnings._setoption with the following changes:
* Does not apply the filter.
* Escaping is optional.
* Raises UsageError so we get nice error messages on failure.
"""
__tracebackhide__ = True
error_template = dedent(
f"""\
while parsing the following warning configuration:
{arg}
This error occurred:
{{error}}
"""
)
parts = arg.split(":")
if len(parts) > 5:
doc_url = (
"https://docs.python.org/3/library/warnings.html#describing-warning-filters"
)
error = dedent(
f"""\
Too many fields ({len(parts)}), expected at most 5 separated by colons:
action:message:category:module:line
For more information please consult: {doc_url}
"""
)
raise UsageError(error_template.format(error=error))
while len(parts) < 5:
parts.append("")
action_, message, category_, module, lineno_ = (s.strip() for s in parts)
try:
action: "warnings._ActionKind" = warnings._getaction(action_) # type: ignore[attr-defined]
except warnings._OptionError as e:
raise UsageError(error_template.format(error=str(e)))
try:
category: Type[Warning] = _resolve_warning_category(category_)
except Exception:
exc_info = ExceptionInfo.from_current()
exception_text = exc_info.getrepr(style="native")
raise UsageError(error_template.format(error=exception_text))
if message and escape:
message = re.escape(message)
if module and escape:
module = re.escape(module) + r"\Z"
if lineno_:
try:
lineno = int(lineno_)
if lineno < 0:
raise ValueError("number is negative")
except ValueError as e:
raise UsageError(
error_template.format(error=f"invalid lineno {lineno_!r}: {e}")
)
else:
lineno = 0
return action, message, category, module, lineno
def _resolve_warning_category(category: str) -> Type[Warning]:
"""
Copied from warnings._getcategory, but changed so it lets exceptions (specially ImportErrors)
propagate so we can get access to their tracebacks (#9218).
"""
__tracebackhide__ = True
if not category:
return Warning
if "." not in category:
import builtins as m
klass = category
else:
module, _, klass = category.rpartition(".")
m = __import__(module, None, None, [klass])
cat = getattr(m, klass)
if not issubclass(cat, Warning):
raise UsageError(f"{cat} is not a Warning subclass")
return cast(Type[Warning], cat)
def apply_warning_filters(
config_filters: Iterable[str], cmdline_filters: Iterable[str]
) -> None:
"""Applies pytest-configured filters to the warnings module"""
# Filters should have this precedence: cmdline options, config.
# Filters should be applied in the inverse order of precedence.
for arg in config_filters:
warnings.filterwarnings(*parse_warning_filter(arg, escape=False))
for arg in cmdline_filters:
warnings.filterwarnings(*parse_warning_filter(arg, escape=True))
