Source code for _pytest.mark

"""Generic mechanism for marking and selecting python functions."""
from typing import AbstractSet
from typing import Collection
from typing import List
from typing import Optional
from typing import TYPE_CHECKING
from typing import Union

import attr

from .expression import Expression
from .expression import ParseError
from .structures import EMPTY_PARAMETERSET_OPTION
from .structures import get_empty_parameterset_mark
from .structures import Mark
from .structures import MARK_GEN
from .structures import MarkDecorator
from .structures import MarkGenerator
from .structures import ParameterSet
from _pytest.config import Config
from _pytest.config import ExitCode
from _pytest.config import hookimpl
from _pytest.config import UsageError
from _pytest.config.argparsing import Parser
from _pytest.stash import StashKey

if TYPE_CHECKING:
    from _pytest.nodes import Item


__all__ = [
    "MARK_GEN",
    "Mark",
    "MarkDecorator",
    "MarkGenerator",
    "ParameterSet",
    "get_empty_parameterset_mark",
]


old_mark_config_key = StashKey[Optional[Config]]()


[docs]def param( *values: object, marks: Union[MarkDecorator, Collection[Union[MarkDecorator, Mark]]] = (), id: Optional[str] = None, ) -> ParameterSet: """Specify a parameter in `pytest.mark.parametrize`_ calls or :ref:`parametrized fixtures <fixture-parametrize-marks>`. .. code-block:: python @pytest.mark.parametrize( "test_input,expected", [ ("3+5", 8), pytest.param("6*9", 42, marks=pytest.mark.xfail), ], ) def test_eval(test_input, expected): assert eval(test_input) == expected :param values: Variable args of the values of the parameter set, in order. :keyword marks: A single mark or a list of marks to be applied to this parameter set. :keyword str id: The id to attribute to this parameter set. """ return ParameterSet.param(*values, marks=marks, id=id)
def pytest_addoption(parser: Parser) -> None: group = parser.getgroup("general") group._addoption( "-k", action="store", dest="keyword", default="", metavar="EXPRESSION", help="Only run tests which match the given substring expression. " "An expression is a Python evaluatable expression " "where all names are substring-matched against test names " "and their parent classes. Example: -k 'test_method or test_" "other' matches all test functions and classes whose name " "contains 'test_method' or 'test_other', while -k 'not test_method' " "matches those that don't contain 'test_method' in their names. " "-k 'not test_method and not test_other' will eliminate the matches. " "Additionally keywords are matched to classes and functions " "containing extra names in their 'extra_keyword_matches' set, " "as well as functions which have names assigned directly to them. " "The matching is case-insensitive.", ) group._addoption( "-m", action="store", dest="markexpr", default="", metavar="MARKEXPR", help="Only run tests matching given mark expression. " "For example: -m 'mark1 and not mark2'.", ) group.addoption( "--markers", action="store_true", help="show markers (builtin, plugin and per-project ones).", ) parser.addini("markers", "Markers for test functions", "linelist") parser.addini(EMPTY_PARAMETERSET_OPTION, "Default marker for empty parametersets") @hookimpl(tryfirst=True) def pytest_cmdline_main(config: Config) -> Optional[Union[int, ExitCode]]: import _pytest.config if config.option.markers: config._do_configure() tw = _pytest.config.create_terminal_writer(config) for line in config.getini("markers"): parts = line.split(":", 1) name = parts[0] rest = parts[1] if len(parts) == 2 else "" tw.write("@pytest.mark.%s:" % name, bold=True) tw.line(rest) tw.line() config._ensure_unconfigure() return 0 return None @attr.s(slots=True, auto_attribs=True) class KeywordMatcher: """A matcher for keywords. Given a list of names, matches any substring of one of these names. The string inclusion check is case-insensitive. Will match on the name of colitem, including the names of its parents. Only matches names of items which are either a :class:`Class` or a :class:`Function`. Additionally, matches on names in the 'extra_keyword_matches' set of any item, as well as names directly assigned to test functions. """ _names: AbstractSet[str] @classmethod def from_item(cls, item: "Item") -> "KeywordMatcher": mapped_names = set() # Add the names of the current item and any parent items. import pytest for node in item.listchain(): if not isinstance(node, pytest.Session): mapped_names.add(node.name) # Add the names added as extra keywords to current or parent items. mapped_names.update(item.listextrakeywords()) # Add the names attached to the current function through direct assignment. function_obj = getattr(item, "function", None) if function_obj: mapped_names.update(function_obj.__dict__) # Add the markers to the keywords as we no longer handle them correctly. mapped_names.update(mark.name for mark in item.iter_markers()) return cls(mapped_names) def __call__(self, subname: str) -> bool: subname = subname.lower() names = (name.lower() for name in self._names) for name in names: if subname in name: return True return False def deselect_by_keyword(items: "List[Item]", config: Config) -> None: keywordexpr = config.option.keyword.lstrip() if not keywordexpr: return expr = _parse_expression(keywordexpr, "Wrong expression passed to '-k'") remaining = [] deselected = [] for colitem in items: if not expr.evaluate(KeywordMatcher.from_item(colitem)): deselected.append(colitem) else: remaining.append(colitem) if deselected: config.hook.pytest_deselected(items=deselected) items[:] = remaining @attr.s(slots=True, auto_attribs=True) class MarkMatcher: """A matcher for markers which are present. Tries to match on any marker names, attached to the given colitem. """ own_mark_names: AbstractSet[str] @classmethod def from_item(cls, item: "Item") -> "MarkMatcher": mark_names = {mark.name for mark in item.iter_markers()} return cls(mark_names) def __call__(self, name: str) -> bool: return name in self.own_mark_names def deselect_by_mark(items: "List[Item]", config: Config) -> None: matchexpr = config.option.markexpr if not matchexpr: return expr = _parse_expression(matchexpr, "Wrong expression passed to '-m'") remaining: List[Item] = [] deselected: List[Item] = [] for item in items: if expr.evaluate(MarkMatcher.from_item(item)): remaining.append(item) else: deselected.append(item) if deselected: config.hook.pytest_deselected(items=deselected) items[:] = remaining def _parse_expression(expr: str, exc_message: str) -> Expression: try: return Expression.compile(expr) except ParseError as e: raise UsageError(f"{exc_message}: {expr}: {e}") from None def pytest_collection_modifyitems(items: "List[Item]", config: Config) -> None: deselect_by_keyword(items, config) deselect_by_mark(items, config) def pytest_configure(config: Config) -> None: config.stash[old_mark_config_key] = MARK_GEN._config MARK_GEN._config = config empty_parameterset = config.getini(EMPTY_PARAMETERSET_OPTION) if empty_parameterset not in ("skip", "xfail", "fail_at_collect", None, ""): raise UsageError( "{!s} must be one of skip, xfail or fail_at_collect" " but it is {!r}".format(EMPTY_PARAMETERSET_OPTION, empty_parameterset) ) def pytest_unconfigure(config: Config) -> None: MARK_GEN._config = config.stash.get(old_mark_config_key, None)