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import collections.abc import dataclasses import inspect import warnings from typing import Any from typing import Callable from typing import Collection from typing import Iterable from typing import Iterator from typing import List from typing import Mapping from typing import MutableMapping from typing import NamedTuple from typing import Optional from typing import overload from typing import Sequence from typing import Set from typing import Tuple from typing import Type from typing import TYPE_CHECKING from typing import TypeVar from typing import Union from .._code import getfslineno from ..compat import ascii_escaped from ..compat import final from ..compat import NOTSET from ..compat import NotSetType from _pytest.config import Config from _pytest.deprecated import check_ispytest from _pytest.outcomes import fail from _pytest.warning_types import PytestUnknownMarkWarning if TYPE_CHECKING: from ..nodes import Node EMPTY_PARAMETERSET_OPTION = "empty_parameter_set_mark" def istestfunc(func) -> bool: return callable(func) and getattr(func, "__name__", "<lambda>") != "<lambda>" def get_empty_parameterset_mark( config: Config, argnames: Sequence[str], func ) -> "MarkDecorator": from ..nodes import Collector fs, lineno = getfslineno(func) reason = "got empty parameter set %r, function %s at %s:%d" % ( argnames, func.__name__, fs, lineno, ) requested_mark = config.getini(EMPTY_PARAMETERSET_OPTION) if requested_mark in ("", None, "skip"): mark = MARK_GEN.skip(reason=reason) elif requested_mark == "xfail": mark = MARK_GEN.xfail(reason=reason, run=False) elif requested_mark == "fail_at_collect": f_name = func.__name__ _, lineno = getfslineno(func) raise Collector.CollectError( "Empty parameter set in '%s' at line %d" % (f_name, lineno + 1) ) else: raise LookupError(requested_mark) return mark class ParameterSet(NamedTuple): values: Sequence[Union[object, NotSetType]] marks: Collection[Union["MarkDecorator", "Mark"]] id: Optional[str] @classmethod def param( cls, *values: object, marks: Union["MarkDecorator", Collection[Union["MarkDecorator", "Mark"]]] = (), id: Optional[str] = None, ) -> "ParameterSet": if isinstance(marks, MarkDecorator): marks = (marks,) else: assert isinstance(marks, collections.abc.Collection) if id is not None: if not isinstance(id, str): raise TypeError(f"Expected id to be a string, got {type(id)}: {id!r}") id = ascii_escaped(id) return cls(values, marks, id) @classmethod def extract_from( cls, parameterset: Union["ParameterSet", Sequence[object], object], force_tuple: bool = False, ) -> "ParameterSet": """Extract from an object or objects. :param parameterset: A legacy style parameterset that may or may not be a tuple, and may or may not be wrapped into a mess of mark objects. :param force_tuple: Enforce tuple wrapping so single argument tuple values don't get decomposed and break tests. """ if isinstance(parameterset, cls): return parameterset if force_tuple: return cls.param(parameterset) else: # TODO: Refactor to fix this type-ignore. Currently the following # passes type-checking but crashes: # # @pytest.mark.parametrize(('x', 'y'), [1, 2]) # def test_foo(x, y): pass return cls(parameterset, marks=[], id=None) # type: ignore[arg-type] @staticmethod def _parse_parametrize_args( argnames: Union[str, Sequence[str]], argvalues: Iterable[Union["ParameterSet", Sequence[object], object]], *args, **kwargs, ) -> Tuple[Sequence[str], bool]: if isinstance(argnames, str): argnames = [x.strip() for x in argnames.split(",") if x.strip()] force_tuple = len(argnames) == 1 else: force_tuple = False return argnames, force_tuple @staticmethod def _parse_parametrize_parameters( argvalues: Iterable[Union["ParameterSet", Sequence[object], object]], force_tuple: bool, ) -> List["ParameterSet"]: return [ ParameterSet.extract_from(x, force_tuple=force_tuple) for x in argvalues ] @classmethod def _for_parametrize( cls, argnames: Union[str, Sequence[str]], argvalues: Iterable[Union["ParameterSet", Sequence[object], object]], func, config: Config, nodeid: str, ) -> Tuple[Sequence[str], List["ParameterSet"]]: argnames, force_tuple = cls._parse_parametrize_args(argnames, argvalues) parameters = cls._parse_parametrize_parameters(argvalues, force_tuple) del argvalues if parameters: # Check all parameter sets have the correct number of values. for param in parameters: if len(param.values) != len(argnames): msg = ( '{nodeid}: in "parametrize" the number of names ({names_len}):\n' " {names}\n" "must be equal to the number of values ({values_len}):\n" " {values}" ) fail( msg.format( nodeid=nodeid, values=param.values, names=argnames, names_len=len(argnames), values_len=len(param.values), ), pytrace=False, ) else: # Empty parameter set (likely computed at runtime): create a single # parameter set with NOTSET values, with the "empty parameter set" mark applied to it. mark = get_empty_parameterset_mark(config, argnames, func) parameters.append( ParameterSet(values=(NOTSET,) * len(argnames), marks=[mark], id=None) ) return argnames, parameters @final @dataclasses.dataclass(frozen=True) class Mark: """A pytest mark.""" #: Name of the mark. name: str #: Positional arguments of the mark decorator. args: Tuple[Any, ...] #: Keyword arguments of the mark decorator. kwargs: Mapping[str, Any] #: Source Mark for ids with parametrize Marks. _param_ids_from: Optional["Mark"] = dataclasses.field(default=None, repr=False) #: Resolved/generated ids with parametrize Marks. _param_ids_generated: Optional[Sequence[str]] = dataclasses.field( default=None, repr=False ) def __init__( self, name: str, args: Tuple[Any, ...], kwargs: Mapping[str, Any], param_ids_from: Optional["Mark"] = None, param_ids_generated: Optional[Sequence[str]] = None, *, _ispytest: bool = False, ) -> None: """:meta private:""" check_ispytest(_ispytest) # Weirdness to bypass frozen=True. object.__setattr__(self, "name", name) object.__setattr__(self, "args", args) object.__setattr__(self, "kwargs", kwargs) object.__setattr__(self, "_param_ids_from", param_ids_from) object.__setattr__(self, "_param_ids_generated", param_ids_generated) def _has_param_ids(self) -> bool: return "ids" in self.kwargs or len(self.args) >= 4 def combined_with(self, other: "Mark") -> "Mark": """Return a new Mark which is a combination of this Mark and another Mark. Combines by appending args and merging kwargs. :param Mark other: The mark to combine with. :rtype: Mark """ assert self.name == other.name # Remember source of ids with parametrize Marks. param_ids_from: Optional[Mark] = None if self.name == "parametrize": if other._has_param_ids(): param_ids_from = other elif self._has_param_ids(): param_ids_from = self return Mark( self.name, self.args + other.args, dict(self.kwargs, **other.kwargs), param_ids_from=param_ids_from, _ispytest=True, ) # A generic parameter designating an object to which a Mark may # be applied -- a test function (callable) or class. # Note: a lambda is not allowed, but this can't be represented. Markable = TypeVar("Markable", bound=Union[Callable[..., object], type]) @dataclasses.dataclass class MarkDecorator: """A decorator for applying a mark on test functions and classes. ``MarkDecorators`` are created with ``pytest.mark``:: mark1 = pytest.mark.NAME # Simple MarkDecorator mark2 = pytest.mark.NAME(name1=value) # Parametrized MarkDecorator and can then be applied as decorators to test functions:: @mark2 def test_function(): pass When a ``MarkDecorator`` is called, it does the following: 1. If called with a single class as its only positional argument and no additional keyword arguments, it attaches the mark to the class so it gets applied automatically to all test cases found in that class. 2. If called with a single function as its only positional argument and no additional keyword arguments, it attaches the mark to the function, containing all the arguments already stored internally in the ``MarkDecorator``. 3. When called in any other case, it returns a new ``MarkDecorator`` instance with the original ``MarkDecorator``'s content updated with the arguments passed to this call. Note: The rules above prevent a ``MarkDecorator`` from storing only a single function or class reference as its positional argument with no additional keyword or positional arguments. You can work around this by using `with_args()`. """ mark: Mark def __init__(self, mark: Mark, *, _ispytest: bool = False) -> None: """:meta private:""" check_ispytest(_ispytest) self.mark = mark @property def name(self) -> str: """Alias for mark.name.""" return self.mark.name @property def args(self) -> Tuple[Any, ...]: """Alias for mark.args.""" return self.mark.args @property def kwargs(self) -> Mapping[str, Any]: """Alias for mark.kwargs.""" return self.mark.kwargs @property def markname(self) -> str: """:meta private:""" return self.name # for backward-compat (2.4.1 had this attr) def with_args(self, *args: object, **kwargs: object) -> "MarkDecorator": """Return a MarkDecorator with extra arguments added. Unlike calling the MarkDecorator, with_args() can be used even if the sole argument is a callable/class. """ mark = Mark(self.name, args, kwargs, _ispytest=True) return MarkDecorator(self.mark.combined_with(mark), _ispytest=True) # Type ignored because the overloads overlap with an incompatible # return type. Not much we can do about that. Thankfully mypy picks # the first match so it works out even if we break the rules. @overload def __call__(self, arg: Markable) -> Markable: # type: ignore[misc] pass @overload def __call__(self, *args: object, **kwargs: object) -> "MarkDecorator": pass def __call__(self, *args: object, **kwargs: object): """Call the MarkDecorator.""" if args and not kwargs: func = args[0] is_class = inspect.isclass(func) if len(args) == 1 and (istestfunc(func) or is_class): store_mark(func, self.mark) return func return self.with_args(*args, **kwargs) def get_unpacked_marks( obj: Union[object, type], *, consider_mro: bool = True, ) -> List[Mark]: """Obtain the unpacked marks that are stored on an object. If obj is a class and consider_mro is true, return marks applied to this class and all of its super-classes in MRO order. If consider_mro is false, only return marks applied directly to this class. """ if isinstance(obj, type): if not consider_mro: mark_lists = [obj.__dict__.get("pytestmark", [])] else: mark_lists = [x.__dict__.get("pytestmark", []) for x in obj.__mro__] mark_list = [] for item in mark_lists: if isinstance(item, list): mark_list.extend(item) else: mark_list.append(item) else: mark_attribute = getattr(obj, "pytestmark", []) if isinstance(mark_attribute, list): mark_list = mark_attribute else: mark_list = [mark_attribute] return list(normalize_mark_list(mark_list)) def normalize_mark_list( mark_list: Iterable[Union[Mark, MarkDecorator]] ) -> Iterable[Mark]: """ Normalize an iterable of Mark or MarkDecorator objects into a list of marks by retrieving the `mark` attribute on MarkDecorator instances. :param mark_list: marks to normalize :returns: A new list of the extracted Mark objects """ for mark in mark_list: mark_obj = getattr(mark, "mark", mark) if not isinstance(mark_obj, Mark): raise TypeError(f"got {repr(mark_obj)} instead of Mark") yield mark_obj def store_mark(obj, mark: Mark) -> None: """Store a Mark on an object. This is used to implement the Mark declarations/decorators correctly. """ assert isinstance(mark, Mark), mark # Always reassign name to avoid updating pytestmark in a reference that # was only borrowed. obj.pytestmark = [*get_unpacked_marks(obj, consider_mro=False), mark] # Typing for builtin pytest marks. This is cheating; it gives builtin marks # special privilege, and breaks modularity. But practicality beats purity... if TYPE_CHECKING: from _pytest.scope import _ScopeName class _SkipMarkDecorator(MarkDecorator): @overload # type: ignore[override,misc,no-overload-impl] def __call__(self, arg: Markable) -> Markable: ... @overload def __call__(self, reason: str = ...) -> "MarkDecorator": ... class _SkipifMarkDecorator(MarkDecorator): def __call__( # type: ignore[override] self, condition: Union[str, bool] = ..., *conditions: Union[str, bool], reason: str = ..., ) -> MarkDecorator: ... class _XfailMarkDecorator(MarkDecorator): @overload # type: ignore[override,misc,no-overload-impl] def __call__(self, arg: Markable) -> Markable: ... @overload def __call__( self, condition: Union[str, bool] = ..., *conditions: Union[str, bool], reason: str = ..., run: bool = ..., raises: Union[Type[BaseException], Tuple[Type[BaseException], ...]] = ..., strict: bool = ..., ) -> MarkDecorator: ... class _ParametrizeMarkDecorator(MarkDecorator): def __call__( # type: ignore[override] self, argnames: Union[str, Sequence[str]], argvalues: Iterable[Union[ParameterSet, Sequence[object], object]], *, indirect: Union[bool, Sequence[str]] = ..., ids: Optional[ Union[ Iterable[Union[None, str, float, int, bool]], Callable[[Any], Optional[object]], ] ] = ..., scope: Optional[_ScopeName] = ..., ) -> MarkDecorator: ... class _UsefixturesMarkDecorator(MarkDecorator): def __call__(self, *fixtures: str) -> MarkDecorator: # type: ignore[override] ... class _FilterwarningsMarkDecorator(MarkDecorator): def __call__(self, *filters: str) -> MarkDecorator: # type: ignore[override] ... @final class MarkGenerator: """Factory for :class:`MarkDecorator` objects - exposed as a ``pytest.mark`` singleton instance. Example:: import pytest @pytest.mark.slowtest def test_function(): pass applies a 'slowtest' :class:`Mark` on ``test_function``. """ # See TYPE_CHECKING above. if TYPE_CHECKING: skip: _SkipMarkDecorator skipif: _SkipifMarkDecorator xfail: _XfailMarkDecorator parametrize: _ParametrizeMarkDecorator usefixtures: _UsefixturesMarkDecorator filterwarnings: _FilterwarningsMarkDecorator def __init__(self, *, _ispytest: bool = False) -> None: check_ispytest(_ispytest) self._config: Optional[Config] = None self._markers: Set[str] = set() def __getattr__(self, name: str) -> MarkDecorator: """Generate a new :class:`MarkDecorator` with the given name.""" if name[0] == "_": raise AttributeError("Marker name must NOT start with underscore") if self._config is not None: # We store a set of markers as a performance optimisation - if a mark # name is in the set we definitely know it, but a mark may be known and # not in the set. We therefore start by updating the set! if name not in self._markers: for line in self._config.getini("markers"): # example lines: "skipif(condition): skip the given test if..." # or "hypothesis: tests which use Hypothesis", so to get the # marker name we split on both `:` and `(`. marker = line.split(":")[0].split("(")[0].strip() self._markers.add(marker) # If the name is not in the set of known marks after updating, # then it really is time to issue a warning or an error. if name not in self._markers: if self._config.option.strict_markers or self._config.option.strict: fail( f"{name!r} not found in `markers` configuration option", pytrace=False, ) # Raise a specific error for common misspellings of "parametrize". if name in ["parameterize", "parametrise", "parameterise"]: __tracebackhide__ = True fail(f"Unknown '{name}' mark, did you mean 'parametrize'?") warnings.warn( "Unknown pytest.mark.%s - is this a typo? You can register " "custom marks to avoid this warning - for details, see " "https://docs.pytest.org/en/stable/how-to/mark.html" % name, PytestUnknownMarkWarning, 2, ) return MarkDecorator(Mark(name, (), {}, _ispytest=True), _ispytest=True) MARK_GEN = MarkGenerator(_ispytest=True) @final class NodeKeywords(MutableMapping[str, Any]): __slots__ = ("node", "parent", "_markers") def __init__(self, node: "Node") -> None: self.node = node self.parent = node.parent self._markers = {node.name: True} def __getitem__(self, key: str) -> Any: try: return self._markers[key] except KeyError: if self.parent is None: raise return self.parent.keywords[key] def __setitem__(self, key: str, value: Any) -> None: self._markers[key] = value # Note: we could've avoided explicitly implementing some of the methods # below and use the collections.abc fallback, but that would be slow. def __contains__(self, key: object) -> bool: return ( key in self._markers or self.parent is not None and key in self.parent.keywords ) def update( # type: ignore[override] self, other: Union[Mapping[str, Any], Iterable[Tuple[str, Any]]] = (), **kwds: Any, ) -> None: self._markers.update(other) self._markers.update(kwds) def __delitem__(self, key: str) -> None: raise ValueError("cannot delete key in keywords dict") def __iter__(self) -> Iterator[str]: # Doesn't need to be fast. yield from self._markers if self.parent is not None: for keyword in self.parent.keywords: # self._marks and self.parent.keywords can have duplicates. if keyword not in self._markers: yield keyword def __len__(self) -> int: # Doesn't need to be fast. return sum(1 for keyword in self) def __repr__(self) -> str: return f"<NodeKeywords for node {self.node}>"
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