# mypy: allow-untyped-defs
"""Python test discovery, setup and run of test functions."""
import abc
from collections import Counter
from collections import defaultdict
import dataclasses
import enum
import fnmatch
from functools import partial
import inspect
import itertools
import os
from pathlib import Path
import types
from typing import Any
from typing import Callable
from typing import Dict
from typing import final
from typing import Generator
from typing import Iterable
from typing import Iterator
from typing import List
from typing import Literal
from typing import Mapping
from typing import Optional
from typing import Pattern
from typing import Sequence
from typing import Set
from typing import Tuple
from typing import TYPE_CHECKING
from typing import Union
import warnings
import _pytest
from _pytest import fixtures
from _pytest import nodes
from _pytest._code import filter_traceback
from _pytest._code import getfslineno
from _pytest._code.code import ExceptionInfo
from _pytest._code.code import TerminalRepr
from _pytest._code.code import Traceback
from _pytest._io.saferepr import saferepr
from _pytest.compat import ascii_escaped
from _pytest.compat import get_default_arg_names
from _pytest.compat import get_real_func
from _pytest.compat import getimfunc
from _pytest.compat import is_async_function
from _pytest.compat import is_generator
from _pytest.compat import LEGACY_PATH
from _pytest.compat import NOTSET
from _pytest.compat import safe_getattr
from _pytest.compat import safe_isclass
from _pytest.config import Config
from _pytest.config import hookimpl
from _pytest.config.argparsing import Parser
from _pytest.deprecated import check_ispytest
from _pytest.fixtures import FixtureDef
from _pytest.fixtures import FixtureRequest
from _pytest.fixtures import FuncFixtureInfo
from _pytest.fixtures import get_scope_node
from _pytest.main import Session
from _pytest.mark import MARK_GEN
from _pytest.mark import ParameterSet
from _pytest.mark.structures import get_unpacked_marks
from _pytest.mark.structures import Mark
from _pytest.mark.structures import MarkDecorator
from _pytest.mark.structures import normalize_mark_list
from _pytest.outcomes import fail
from _pytest.outcomes import skip
from _pytest.pathlib import fnmatch_ex
from _pytest.pathlib import import_path
from _pytest.pathlib import ImportPathMismatchError
from _pytest.pathlib import scandir
from _pytest.scope import _ScopeName
from _pytest.scope import Scope
from _pytest.stash import StashKey
from _pytest.warning_types import PytestCollectionWarning
from _pytest.warning_types import PytestReturnNotNoneWarning
from _pytest.warning_types import PytestUnhandledCoroutineWarning
if TYPE_CHECKING:
from typing import Self
def pytest_addoption(parser: Parser) -> None:
parser.addini(
"python_files",
type="args",
# NOTE: default is also used in AssertionRewritingHook.
default=["test_*.py", "*_test.py"],
help="Glob-style file patterns for Python test module discovery",
)
parser.addini(
"python_classes",
type="args",
default=["Test"],
help="Prefixes or glob names for Python test class discovery",
)
parser.addini(
"python_functions",
type="args",
default=["test"],
help="Prefixes or glob names for Python test function and method discovery",
)
parser.addini(
"disable_test_id_escaping_and_forfeit_all_rights_to_community_support",
type="bool",
default=False,
help="Disable string escape non-ASCII characters, might cause unwanted "
"side effects(use at your own risk)",
)
def pytest_generate_tests(metafunc: "Metafunc") -> None:
for marker in metafunc.definition.iter_markers(name="parametrize"):
metafunc.parametrize(*marker.args, **marker.kwargs, _param_mark=marker)
def pytest_configure(config: Config) -> None:
config.addinivalue_line(
"markers",
"parametrize(argnames, argvalues): call a test function multiple "
"times passing in different arguments in turn. argvalues generally "
"needs to be a list of values if argnames specifies only one name "
"or a list of tuples of values if argnames specifies multiple names. "
"Example: @parametrize('arg1', [1,2]) would lead to two calls of the "
"decorated test function, one with arg1=1 and another with arg1=2."
"see https://pytest.pythonlang.cn/en/stable/how-to/parametrize.html for more info "
"and examples.",
)
config.addinivalue_line(
"markers",
"usefixtures(fixturename1, fixturename2, ...): mark tests as needing "
"all of the specified fixtures. see "
"https://pytest.pythonlang.cn/en/stable/explanation/fixtures.html#usefixtures ",
)
def async_warn_and_skip(nodeid: str) -> None:
msg = "async def functions are not natively supported and have been skipped.\n"
msg += (
"You need to install a suitable plugin for your async framework, for example:\n"
)
msg += " - anyio\n"
msg += " - pytest-asyncio\n"
msg += " - pytest-tornasync\n"
msg += " - pytest-trio\n"
msg += " - pytest-twisted"
warnings.warn(PytestUnhandledCoroutineWarning(msg.format(nodeid)))
skip(reason="async def function and no async plugin installed (see warnings)")
@hookimpl(trylast=True)
def pytest_pyfunc_call(pyfuncitem: "Function") -> Optional[object]:
testfunction = pyfuncitem.obj
if is_async_function(testfunction):
async_warn_and_skip(pyfuncitem.nodeid)
funcargs = pyfuncitem.funcargs
testargs = {arg: funcargs[arg] for arg in pyfuncitem._fixtureinfo.argnames}
result = testfunction(**testargs)
if hasattr(result, "__await__") or hasattr(result, "__aiter__"):
async_warn_and_skip(pyfuncitem.nodeid)
elif result is not None:
warnings.warn(
PytestReturnNotNoneWarning(
f"Expected None, but {pyfuncitem.nodeid} returned {result!r}, which will be an error in a "
"future version of pytest. Did you mean to use `assert` instead of `return`?"
)
)
return True
def pytest_collect_directory(
path: Path, parent: nodes.Collector
) -> Optional[nodes.Collector]:
pkginit = path / "__init__.py"
if pkginit.is_file():
return Package.from_parent(parent, path=path)
return None
def pytest_collect_file(file_path: Path, parent: nodes.Collector) -> Optional["Module"]:
if file_path.suffix == ".py":
if not parent.session.isinitpath(file_path):
if not path_matches_patterns(
file_path, parent.config.getini("python_files")
):
return None
ihook = parent.session.gethookproxy(file_path)
module: Module = ihook.pytest_pycollect_makemodule(
module_path=file_path, parent=parent
)
return module
return None
def path_matches_patterns(path: Path, patterns: Iterable[str]) -> bool:
"""Return whether path matches any of the patterns in the list of globs given."""
return any(fnmatch_ex(pattern, path) for pattern in patterns)
def pytest_pycollect_makemodule(module_path: Path, parent) -> "Module":
return Module.from_parent(parent, path=module_path)
@hookimpl(trylast=True)
def pytest_pycollect_makeitem(
collector: Union["Module", "Class"], name: str, obj: object
) -> Union[None, nodes.Item, nodes.Collector, List[Union[nodes.Item, nodes.Collector]]]:
assert isinstance(collector, (Class, Module)), type(collector)
# Nothing was collected elsewhere, let's do it here.
if safe_isclass(obj):
if collector.istestclass(obj, name):
return Class.from_parent(collector, name=name, obj=obj)
elif collector.istestfunction(obj, name):
# mock seems to store unbound methods (issue473), normalize it.
obj = getattr(obj, "__func__", obj)
# We need to try and unwrap the function if it's a functools.partial
# or a functools.wrapped.
# We mustn't if it's been wrapped with mock.patch (python 2 only).
if not (inspect.isfunction(obj) or inspect.isfunction(get_real_func(obj))):
filename, lineno = getfslineno(obj)
warnings.warn_explicit(
message=PytestCollectionWarning(
"cannot collect %r because it is not a function." % name
),
category=None,
filename=str(filename),
lineno=lineno + 1,
)
elif getattr(obj, "__test__", True):
if is_generator(obj):
res = Function.from_parent(collector, name=name)
reason = (
f"yield tests were removed in pytest 4.0 - {name} will be ignored"
)
res.add_marker(MARK_GEN.xfail(run=False, reason=reason))
res.warn(PytestCollectionWarning(reason))
return res
else:
return list(collector._genfunctions(name, obj))
return None
class PyobjMixin(nodes.Node):
"""this mix-in inherits from Node to carry over the typing information
as its intended to always mix in before a node
its position in the mro is unaffected"""
_ALLOW_MARKERS = True
@property
def module(self):
"""Python module object this node was collected from (can be None)."""
node = self.getparent(Module)
return node.obj if node is not None else None
@property
def cls(self):
"""Python class object this node was collected from (can be None)."""
node = self.getparent(Class)
return node.obj if node is not None else None
@property
def instance(self):
"""Python instance object the function is bound to.
Returns None if not a test method, e.g. for a standalone test function,
a class or a module.
"""
# Overridden by Function.
return None
@property
def obj(self):
"""Underlying Python object."""
obj = getattr(self, "_obj", None)
if obj is None:
self._obj = obj = self._getobj()
# XXX evil hack
# used to avoid Function marker duplication
if self._ALLOW_MARKERS:
self.own_markers.extend(get_unpacked_marks(self.obj))
# This assumes that `obj` is called before there is a chance
# to add custom keys to `self.keywords`, so no fear of overriding.
self.keywords.update((mark.name, mark) for mark in self.own_markers)
return obj
@obj.setter
def obj(self, value):
self._obj = value
def _getobj(self):
"""Get the underlying Python object. May be overwritten by subclasses."""
# TODO: Improve the type of `parent` such that assert/ignore aren't needed.
assert self.parent is not None
obj = self.parent.obj # type: ignore[attr-defined]
return getattr(obj, self.name)
def getmodpath(self, stopatmodule: bool = True, includemodule: bool = False) -> str:
"""Return Python path relative to the containing module."""
parts = []
for node in self.iter_parents():
name = node.name
if isinstance(node, Module):
name = os.path.splitext(name)[0]
if stopatmodule:
if includemodule:
parts.append(name)
break
parts.append(name)
parts.reverse()
return ".".join(parts)
def reportinfo(self) -> Tuple[Union["os.PathLike[str]", str], Optional[int], str]:
# XXX caching?
path, lineno = getfslineno(self.obj)
modpath = self.getmodpath()
return path, lineno, modpath
# As an optimization, these builtin attribute names are pre-ignored when
# iterating over an object during collection -- the pytest_pycollect_makeitem
# hook is not called for them.
# fmt: off
class _EmptyClass: pass # noqa: E701
IGNORED_ATTRIBUTES = frozenset.union(
frozenset(),
# Module.
dir(types.ModuleType("empty_module")),
# Some extra module attributes the above doesn't catch.
{"__builtins__", "__file__", "__cached__"},
# Class.
dir(_EmptyClass),
# Instance.
dir(_EmptyClass()),
)
del _EmptyClass
# fmt: on
class PyCollector(PyobjMixin, nodes.Collector, abc.ABC):
def funcnamefilter(self, name: str) -> bool:
return self._matches_prefix_or_glob_option("python_functions", name)
def isnosetest(self, obj: object) -> bool:
"""Look for the __test__ attribute, which is applied by the
@nose.tools.istest decorator.
"""
# We explicitly check for "is True" here to not mistakenly treat
# classes with a custom __getattr__ returning something truthy (like a
# function) as test classes.
return safe_getattr(obj, "__test__", False) is True
def classnamefilter(self, name: str) -> bool:
return self._matches_prefix_or_glob_option("python_classes", name)
def istestfunction(self, obj: object, name: str) -> bool:
if self.funcnamefilter(name) or self.isnosetest(obj):
if isinstance(obj, (staticmethod, classmethod)):
# staticmethods and classmethods need to be unwrapped.
obj = safe_getattr(obj, "__func__", False)
return callable(obj) and fixtures.getfixturemarker(obj) is None
else:
return False
def istestclass(self, obj: object, name: str) -> bool:
return self.classnamefilter(name) or self.isnosetest(obj)
def _matches_prefix_or_glob_option(self, option_name: str, name: str) -> bool:
"""Check if the given name matches the prefix or glob-pattern defined
in ini configuration."""
for option in self.config.getini(option_name):
if name.startswith(option):
return True
# Check that name looks like a glob-string before calling fnmatch
# because this is called for every name in each collected module,
# and fnmatch is somewhat expensive to call.
elif ("*" in option or "?" in option or "[" in option) and fnmatch.fnmatch(
name, option
):
return True
return False
def collect(self) -> Iterable[Union[nodes.Item, nodes.Collector]]:
if not getattr(self.obj, "__test__", True):
return []
# Avoid random getattrs and peek in the __dict__ instead.
dicts = [getattr(self.obj, "__dict__", {})]
if isinstance(self.obj, type):
for basecls in self.obj.__mro__:
dicts.append(basecls.__dict__)
# In each class, nodes should be definition ordered.
# __dict__ is definition ordered.
seen: Set[str] = set()
dict_values: List[List[Union[nodes.Item, nodes.Collector]]] = []
ihook = self.ihook
for dic in dicts:
values: List[Union[nodes.Item, nodes.Collector]] = []
# Note: seems like the dict can change during iteration -
# be careful not to remove the list() without consideration.
for name, obj in list(dic.items()):
if name in IGNORED_ATTRIBUTES:
continue
if name in seen:
continue
seen.add(name)
res = ihook.pytest_pycollect_makeitem(
collector=self, name=name, obj=obj
)
if res is None:
continue
elif isinstance(res, list):
values.extend(res)
else:
values.append(res)
dict_values.append(values)
# Between classes in the class hierarchy, reverse-MRO order -- nodes
# inherited from base classes should come before subclasses.
result = []
for values in reversed(dict_values):
result.extend(values)
return result
def _genfunctions(self, name: str, funcobj) -> Iterator["Function"]:
modulecol = self.getparent(Module)
assert modulecol is not None
module = modulecol.obj
clscol = self.getparent(Class)
cls = clscol and clscol.obj or None
definition = FunctionDefinition.from_parent(self, name=name, callobj=funcobj)
fixtureinfo = definition._fixtureinfo
# pytest_generate_tests impls call metafunc.parametrize() which fills
# metafunc._calls, the outcome of the hook.
metafunc = Metafunc(
definition=definition,
fixtureinfo=fixtureinfo,
config=self.config,
cls=cls,
module=module,
_ispytest=True,
)
methods = []
if hasattr(module, "pytest_generate_tests"):
methods.append(module.pytest_generate_tests)
if cls is not None and hasattr(cls, "pytest_generate_tests"):
methods.append(cls().pytest_generate_tests)
self.ihook.pytest_generate_tests.call_extra(methods, dict(metafunc=metafunc))
if not metafunc._calls:
yield Function.from_parent(self, name=name, fixtureinfo=fixtureinfo)
else:
# Direct parametrizations taking place in module/class-specific
# `metafunc.parametrize` calls may have shadowed some fixtures, so make sure
# we update what the function really needs a.k.a its fixture closure. Note that
# direct parametrizations using `@pytest.mark.parametrize` have already been considered
# into making the closure using `ignore_args` arg to `getfixtureclosure`.
fixtureinfo.prune_dependency_tree()
for callspec in metafunc._calls:
subname = f"{name}[{callspec.id}]"
yield Function.from_parent(
self,
name=subname,
callspec=callspec,
fixtureinfo=fixtureinfo,
keywords={callspec.id: True},
originalname=name,
)
def importtestmodule(
path: Path,
config: Config,
):
# We assume we are only called once per module.
importmode = config.getoption("--import-mode")
try:
mod = import_path(
path,
mode=importmode,
root=config.rootpath,
consider_namespace_packages=config.getini("consider_namespace_packages"),
)
except SyntaxError as e:
raise nodes.Collector.CollectError(
ExceptionInfo.from_current().getrepr(style="short")
) from e
except ImportPathMismatchError as e:
raise nodes.Collector.CollectError(
"import file mismatch:\n"
"imported module {!r} has this __file__ attribute:\n"
" {}\n"
"which is not the same as the test file we want to collect:\n"
" {}\n"
"HINT: remove __pycache__ / .pyc files and/or use a "
"unique basename for your test file modules".format(*e.args)
) from e
except ImportError as e:
exc_info = ExceptionInfo.from_current()
if config.getoption("verbose") < 2:
exc_info.traceback = exc_info.traceback.filter(filter_traceback)
exc_repr = (
exc_info.getrepr(style="short")
if exc_info.traceback
else exc_info.exconly()
)
formatted_tb = str(exc_repr)
raise nodes.Collector.CollectError(
f"ImportError while importing test module '{path}'.\n"
"Hint: make sure your test modules/packages have valid Python names.\n"
"Traceback:\n"
f"{formatted_tb}"
) from e
except skip.Exception as e:
if e.allow_module_level:
raise
raise nodes.Collector.CollectError(
"Using pytest.skip outside of a test will skip the entire module. "
"If that's your intention, pass `allow_module_level=True`. "
"If you want to skip a specific test or an entire class, "
"use the @pytest.mark.skip or @pytest.mark.skipif decorators."
) from e
config.pluginmanager.consider_module(mod)
return mod
[docs]
class Module(nodes.File, PyCollector):
"""Collector for test classes and functions in a Python module."""
def _getobj(self):
return importtestmodule(self.path, self.config)
[docs]
def collect(self) -> Iterable[Union[nodes.Item, nodes.Collector]]:
self._register_setup_module_fixture()
self._register_setup_function_fixture()
self.session._fixturemanager.parsefactories(self)
return super().collect()
def _register_setup_module_fixture(self) -> None:
"""Register an autouse, module-scoped fixture for the collected module object
that invokes setUpModule/tearDownModule if either or both are available.
Using a fixture to invoke this methods ensures we play nicely and unsurprisingly with
other fixtures (#517).
"""
setup_module = _get_first_non_fixture_func(
self.obj, ("setUpModule", "setup_module")
)
teardown_module = _get_first_non_fixture_func(
self.obj, ("tearDownModule", "teardown_module")
)
if setup_module is None and teardown_module is None:
return
def xunit_setup_module_fixture(request) -> Generator[None, None, None]:
module = request.module
if setup_module is not None:
_call_with_optional_argument(setup_module, module)
yield
if teardown_module is not None:
_call_with_optional_argument(teardown_module, module)
self.session._fixturemanager._register_fixture(
# Use a unique name to speed up lookup.
name=f"_xunit_setup_module_fixture_{self.obj.__name__}",
func=xunit_setup_module_fixture,
nodeid=self.nodeid,
scope="module",
autouse=True,
)
def _register_setup_function_fixture(self) -> None:
"""Register an autouse, function-scoped fixture for the collected module object
that invokes setup_function/teardown_function if either or both are available.
Using a fixture to invoke this methods ensures we play nicely and unsurprisingly with
other fixtures (#517).
"""
setup_function = _get_first_non_fixture_func(self.obj, ("setup_function",))
teardown_function = _get_first_non_fixture_func(
self.obj, ("teardown_function",)
)
if setup_function is None and teardown_function is None:
return
def xunit_setup_function_fixture(request) -> Generator[None, None, None]:
if request.instance is not None:
# in this case we are bound to an instance, so we need to let
# setup_method handle this
yield
return
function = request.function
if setup_function is not None:
_call_with_optional_argument(setup_function, function)
yield
if teardown_function is not None:
_call_with_optional_argument(teardown_function, function)
self.session._fixturemanager._register_fixture(
# Use a unique name to speed up lookup.
name=f"_xunit_setup_function_fixture_{self.obj.__name__}",
func=xunit_setup_function_fixture,
nodeid=self.nodeid,
scope="function",
autouse=True,
)
[docs]
class Package(nodes.Directory):
"""Collector for files and directories in a Python packages -- directories
with an `__init__.py` file.
.. note::
Directories without an `__init__.py` file are instead collected by
:class:`~pytest.Dir` by default. Both are :class:`~pytest.Directory`
collectors.
.. versionchanged:: 8.0
Now inherits from :class:`~pytest.Directory`.
"""
def __init__(
self,
fspath: Optional[LEGACY_PATH],
parent: nodes.Collector,
# NOTE: following args are unused:
config=None,
session=None,
nodeid=None,
path: Optional[Path] = None,
) -> None:
# NOTE: Could be just the following, but kept as-is for compat.
# super().__init__(self, fspath, parent=parent)
session = parent.session
super().__init__(
fspath=fspath,
path=path,
parent=parent,
config=config,
session=session,
nodeid=nodeid,
)
def setup(self) -> None:
init_mod = importtestmodule(self.path / "__init__.py", self.config)
# Not using fixtures to call setup_module here because autouse fixtures
# from packages are not called automatically (#4085).
setup_module = _get_first_non_fixture_func(
init_mod, ("setUpModule", "setup_module")
)
if setup_module is not None:
_call_with_optional_argument(setup_module, init_mod)
teardown_module = _get_first_non_fixture_func(
init_mod, ("tearDownModule", "teardown_module")
)
if teardown_module is not None:
func = partial(_call_with_optional_argument, teardown_module, init_mod)
self.addfinalizer(func)
[docs]
def collect(self) -> Iterable[Union[nodes.Item, nodes.Collector]]:
# Always collect __init__.py first.
def sort_key(entry: "os.DirEntry[str]") -> object:
return (entry.name != "__init__.py", entry.name)
config = self.config
col: Optional[nodes.Collector]
cols: Sequence[nodes.Collector]
ihook = self.ihook
for direntry in scandir(self.path, sort_key):
if direntry.is_dir():
path = Path(direntry.path)
if not self.session.isinitpath(path, with_parents=True):
if ihook.pytest_ignore_collect(collection_path=path, config=config):
continue
col = ihook.pytest_collect_directory(path=path, parent=self)
if col is not None:
yield col
elif direntry.is_file():
path = Path(direntry.path)
if not self.session.isinitpath(path):
if ihook.pytest_ignore_collect(collection_path=path, config=config):
continue
cols = ihook.pytest_collect_file(file_path=path, parent=self)
yield from cols
def _call_with_optional_argument(func, arg) -> None:
"""Call the given function with the given argument if func accepts one argument, otherwise
calls func without arguments."""
arg_count = func.__code__.co_argcount
if inspect.ismethod(func):
arg_count -= 1
if arg_count:
func(arg)
else:
func()
def _get_first_non_fixture_func(obj: object, names: Iterable[str]) -> Optional[object]:
"""Return the attribute from the given object to be used as a setup/teardown
xunit-style function, but only if not marked as a fixture to avoid calling it twice.
"""
for name in names:
meth: Optional[object] = getattr(obj, name, None)
if meth is not None and fixtures.getfixturemarker(meth) is None:
return meth
return None
[docs]
class Class(PyCollector):
"""Collector for test methods (and nested classes) in a Python class."""
[docs]
@classmethod
def from_parent(cls, parent, *, name, obj=None, **kw) -> "Self": # type: ignore[override]
"""The public constructor."""
return super().from_parent(name=name, parent=parent, **kw)
def newinstance(self):
return self.obj()
[docs]
def collect(self) -> Iterable[Union[nodes.Item, nodes.Collector]]:
if not safe_getattr(self.obj, "__test__", True):
return []
if hasinit(self.obj):
assert self.parent is not None
self.warn(
PytestCollectionWarning(
f"cannot collect test class {self.obj.__name__!r} because it has a "
f"__init__ constructor (from: {self.parent.nodeid})"
)
)
return []
elif hasnew(self.obj):
assert self.parent is not None
self.warn(
PytestCollectionWarning(
f"cannot collect test class {self.obj.__name__!r} because it has a "
f"__new__ constructor (from: {self.parent.nodeid})"
)
)
return []
self._register_setup_class_fixture()
self._register_setup_method_fixture()
self.session._fixturemanager.parsefactories(self.newinstance(), self.nodeid)
return super().collect()
def _register_setup_class_fixture(self) -> None:
"""Register an autouse, class scoped fixture into the collected class object
that invokes setup_class/teardown_class if either or both are available.
Using a fixture to invoke this methods ensures we play nicely and unsurprisingly with
other fixtures (#517).
"""
setup_class = _get_first_non_fixture_func(self.obj, ("setup_class",))
teardown_class = _get_first_non_fixture_func(self.obj, ("teardown_class",))
if setup_class is None and teardown_class is None:
return
def xunit_setup_class_fixture(request) -> Generator[None, None, None]:
cls = request.cls
if setup_class is not None:
func = getimfunc(setup_class)
_call_with_optional_argument(func, cls)
yield
if teardown_class is not None:
func = getimfunc(teardown_class)
_call_with_optional_argument(func, cls)
self.session._fixturemanager._register_fixture(
# Use a unique name to speed up lookup.
name=f"_xunit_setup_class_fixture_{self.obj.__qualname__}",
func=xunit_setup_class_fixture,
nodeid=self.nodeid,
scope="class",
autouse=True,
)
def _register_setup_method_fixture(self) -> None:
"""Register an autouse, function scoped fixture into the collected class object
that invokes setup_method/teardown_method if either or both are available.
Using a fixture to invoke these methods ensures we play nicely and unsurprisingly with
other fixtures (#517).
"""
setup_name = "setup_method"
setup_method = _get_first_non_fixture_func(self.obj, (setup_name,))
teardown_name = "teardown_method"
teardown_method = _get_first_non_fixture_func(self.obj, (teardown_name,))
if setup_method is None and teardown_method is None:
return
def xunit_setup_method_fixture(request) -> Generator[None, None, None]:
instance = request.instance
method = request.function
if setup_method is not None:
func = getattr(instance, setup_name)
_call_with_optional_argument(func, method)
yield
if teardown_method is not None:
func = getattr(instance, teardown_name)
_call_with_optional_argument(func, method)
self.session._fixturemanager._register_fixture(
# Use a unique name to speed up lookup.
name=f"_xunit_setup_method_fixture_{self.obj.__qualname__}",
func=xunit_setup_method_fixture,
nodeid=self.nodeid,
scope="function",
autouse=True,
)
def hasinit(obj: object) -> bool:
init: object = getattr(obj, "__init__", None)
if init:
return init != object.__init__
return False
def hasnew(obj: object) -> bool:
new: object = getattr(obj, "__new__", None)
if new:
return new != object.__new__
return False
@final
@dataclasses.dataclass(frozen=True)
class IdMaker:
"""Make IDs for a parametrization."""
__slots__ = (
"argnames",
"parametersets",
"idfn",
"ids",
"config",
"nodeid",
"func_name",
)
# The argnames of the parametrization.
argnames: Sequence[str]
# The ParameterSets of the parametrization.
parametersets: Sequence[ParameterSet]
# Optionally, a user-provided callable to make IDs for parameters in a
# ParameterSet.
idfn: Optional[Callable[[Any], Optional[object]]]
# Optionally, explicit IDs for ParameterSets by index.
ids: Optional[Sequence[Optional[object]]]
# Optionally, the pytest config.
# Used for controlling ASCII escaping, and for calling the
# :hook:`pytest_make_parametrize_id` hook.
config: Optional[Config]
# Optionally, the ID of the node being parametrized.
# Used only for clearer error messages.
nodeid: Optional[str]
# Optionally, the ID of the function being parametrized.
# Used only for clearer error messages.
func_name: Optional[str]
def make_unique_parameterset_ids(self) -> List[str]:
"""Make a unique identifier for each ParameterSet, that may be used to
identify the parametrization in a node ID.
Format is <prm_1_token>-...-<prm_n_token>[counter], where prm_x_token is
- user-provided id, if given
- else an id derived from the value, applicable for certain types
- else <argname><parameterset index>
The counter suffix is appended only in case a string wouldn't be unique
otherwise.
"""
resolved_ids = list(self._resolve_ids())
# All IDs must be unique!
if len(resolved_ids) != len(set(resolved_ids)):
# Record the number of occurrences of each ID.
id_counts = Counter(resolved_ids)
# Map the ID to its next suffix.
id_suffixes: Dict[str, int] = defaultdict(int)
# Suffix non-unique IDs to make them unique.
for index, id in enumerate(resolved_ids):
if id_counts[id] > 1:
suffix = ""
if id and id[-1].isdigit():
suffix = "_"
new_id = f"{id}{suffix}{id_suffixes[id]}"
while new_id in set(resolved_ids):
id_suffixes[id] += 1
new_id = f"{id}{suffix}{id_suffixes[id]}"
resolved_ids[index] = new_id
id_suffixes[id] += 1
assert len(resolved_ids) == len(
set(resolved_ids)
), f"Internal error: {resolved_ids=}"
return resolved_ids
def _resolve_ids(self) -> Iterable[str]:
"""Resolve IDs for all ParameterSets (may contain duplicates)."""
for idx, parameterset in enumerate(self.parametersets):
if parameterset.id is not None:
# ID provided directly - pytest.param(..., id="...")
yield parameterset.id
elif self.ids and idx < len(self.ids) and self.ids[idx] is not None:
# ID provided in the IDs list - parametrize(..., ids=[...]).
yield self._idval_from_value_required(self.ids[idx], idx)
else:
# ID not provided - generate it.
yield "-".join(
self._idval(val, argname, idx)
for val, argname in zip(parameterset.values, self.argnames)
)
def _idval(self, val: object, argname: str, idx: int) -> str:
"""Make an ID for a parameter in a ParameterSet."""
idval = self._idval_from_function(val, argname, idx)
if idval is not None:
return idval
idval = self._idval_from_hook(val, argname)
if idval is not None:
return idval
idval = self._idval_from_value(val)
if idval is not None:
return idval
return self._idval_from_argname(argname, idx)
def _idval_from_function(
self, val: object, argname: str, idx: int
) -> Optional[str]:
"""Try to make an ID for a parameter in a ParameterSet using the
user-provided id callable, if given."""
if self.idfn is None:
return None
try:
id = self.idfn(val)
except Exception as e:
prefix = f"{self.nodeid}: " if self.nodeid is not None else ""
msg = "error raised while trying to determine id of parameter '{}' at position {}"
msg = prefix + msg.format(argname, idx)
raise ValueError(msg) from e
if id is None:
return None
return self._idval_from_value(id)
def _idval_from_hook(self, val: object, argname: str) -> Optional[str]:
"""Try to make an ID for a parameter in a ParameterSet by calling the
:hook:`pytest_make_parametrize_id` hook."""
if self.config:
id: Optional[str] = self.config.hook.pytest_make_parametrize_id(
config=self.config, val=val, argname=argname
)
return id
return None
def _idval_from_value(self, val: object) -> Optional[str]:
"""Try to make an ID for a parameter in a ParameterSet from its value,
if the value type is supported."""
if isinstance(val, (str, bytes)):
return _ascii_escaped_by_config(val, self.config)
elif val is None or isinstance(val, (float, int, bool, complex)):
return str(val)
elif isinstance(val, Pattern):
return ascii_escaped(val.pattern)
elif val is NOTSET:
# Fallback to default. Note that NOTSET is an enum.Enum.
pass
elif isinstance(val, enum.Enum):
return str(val)
elif isinstance(getattr(val, "__name__", None), str):
# Name of a class, function, module, etc.
name: str = getattr(val, "__name__")
return name
return None
def _idval_from_value_required(self, val: object, idx: int) -> str:
"""Like _idval_from_value(), but fails if the type is not supported."""
id = self._idval_from_value(val)
if id is not None:
return id
# Fail.
if self.func_name is not None:
prefix = f"In {self.func_name}: "
elif self.nodeid is not None:
prefix = f"In {self.nodeid}: "
else:
prefix = ""
msg = (
f"{prefix}ids contains unsupported value {saferepr(val)} (type: {type(val)!r}) at index {idx}. "
"Supported types are: str, bytes, int, float, complex, bool, enum, regex or anything with a __name__."
)
fail(msg, pytrace=False)
@staticmethod
def _idval_from_argname(argname: str, idx: int) -> str:
"""Make an ID for a parameter in a ParameterSet from the argument name
and the index of the ParameterSet."""
return str(argname) + str(idx)
@final
@dataclasses.dataclass(frozen=True)
class CallSpec2:
"""A planned parameterized invocation of a test function.
Calculated during collection for a given test function's Metafunc.
Once collection is over, each callspec is turned into a single Item
and stored in item.callspec.
"""
# arg name -> arg value which will be passed to a fixture or pseudo-fixture
# of the same name. (indirect or direct parametrization respectively)
params: Dict[str, object] = dataclasses.field(default_factory=dict)
# arg name -> arg index.
indices: Dict[str, int] = dataclasses.field(default_factory=dict)
# Used for sorting parametrized resources.
_arg2scope: Mapping[str, Scope] = dataclasses.field(default_factory=dict)
# Parts which will be added to the item's name in `[..]` separated by "-".
_idlist: Sequence[str] = dataclasses.field(default_factory=tuple)
# Marks which will be applied to the item.
marks: List[Mark] = dataclasses.field(default_factory=list)
def setmulti(
self,
*,
argnames: Iterable[str],
valset: Iterable[object],
id: str,
marks: Iterable[Union[Mark, MarkDecorator]],
scope: Scope,
param_index: int,
) -> "CallSpec2":
params = self.params.copy()
indices = self.indices.copy()
arg2scope = dict(self._arg2scope)
for arg, val in zip(argnames, valset):
if arg in params:
raise ValueError(f"duplicate parametrization of {arg!r}")
params[arg] = val
indices[arg] = param_index
arg2scope[arg] = scope
return CallSpec2(
params=params,
indices=indices,
_arg2scope=arg2scope,
_idlist=[*self._idlist, id],
marks=[*self.marks, *normalize_mark_list(marks)],
)
def getparam(self, name: str) -> object:
try:
return self.params[name]
except KeyError as e:
raise ValueError(name) from e
@property
def id(self) -> str:
return "-".join(self._idlist)
def get_direct_param_fixture_func(request: FixtureRequest) -> Any:
return request.param
# Used for storing pseudo fixturedefs for direct parametrization.
name2pseudofixturedef_key = StashKey[Dict[str, FixtureDef[Any]]]()
def _find_parametrized_scope(
argnames: Sequence[str],
arg2fixturedefs: Mapping[str, Sequence[fixtures.FixtureDef[object]]],
indirect: Union[bool, Sequence[str]],
) -> Scope:
"""Find the most appropriate scope for a parametrized call based on its arguments.
When there's at least one direct argument, always use "function" scope.
When a test function is parametrized and all its arguments are indirect
(e.g. fixtures), return the most narrow scope based on the fixtures used.
Related to issue #1832, based on code posted by @Kingdread.
"""
if isinstance(indirect, Sequence):
all_arguments_are_fixtures = len(indirect) == len(argnames)
else:
all_arguments_are_fixtures = bool(indirect)
if all_arguments_are_fixtures:
fixturedefs = arg2fixturedefs or {}
used_scopes = [
fixturedef[-1]._scope
for name, fixturedef in fixturedefs.items()
if name in argnames
]
# Takes the most narrow scope from used fixtures.
return min(used_scopes, default=Scope.Function)
return Scope.Function
def _ascii_escaped_by_config(val: Union[str, bytes], config: Optional[Config]) -> str:
if config is None:
escape_option = False
else:
escape_option = config.getini(
"disable_test_id_escaping_and_forfeit_all_rights_to_community_support"
)
# TODO: If escaping is turned off and the user passes bytes,
# will return a bytes. For now we ignore this but the
# code *probably* doesn't handle this case.
return val if escape_option else ascii_escaped(val) # type: ignore
[docs]
class Function(PyobjMixin, nodes.Item):
"""Item responsible for setting up and executing a Python test function.
:param name:
The full function name, including any decorations like those
added by parametrization (``my_func[my_param]``).
:param parent:
The parent Node.
:param config:
The pytest Config object.
:param callspec:
If given, this function has been parametrized and the callspec contains
meta information about the parametrization.
:param callobj:
If given, the object which will be called when the Function is invoked,
otherwise the callobj will be obtained from ``parent`` using ``originalname``.
:param keywords:
Keywords bound to the function object for "-k" matching.
:param session:
The pytest Session object.
:param fixtureinfo:
Fixture information already resolved at this fixture node..
:param originalname:
The attribute name to use for accessing the underlying function object.
Defaults to ``name``. Set this if name is different from the original name,
for example when it contains decorations like those added by parametrization
(``my_func[my_param]``).
"""
# Disable since functions handle it themselves.
_ALLOW_MARKERS = False
def __init__(
self,
name: str,
parent,
config: Optional[Config] = None,
callspec: Optional[CallSpec2] = None,
callobj=NOTSET,
keywords: Optional[Mapping[str, Any]] = None,
session: Optional[Session] = None,
fixtureinfo: Optional[FuncFixtureInfo] = None,
originalname: Optional[str] = None,
) -> None:
super().__init__(name, parent, config=config, session=session)
if callobj is not NOTSET:
self._obj = callobj
self._instance = getattr(callobj, "__self__", None)
#: Original function name, without any decorations (for example
#: parametrization adds a ``"[...]"`` suffix to function names), used to access
#: the underlying function object from ``parent`` (in case ``callobj`` is not given
#: explicitly).
#:
#: .. versionadded:: 3.0
self.originalname = originalname or name
# Note: when FunctionDefinition is introduced, we should change ``originalname``
# to a readonly property that returns FunctionDefinition.name.
self.own_markers.extend(get_unpacked_marks(self.obj))
if callspec:
self.callspec = callspec
self.own_markers.extend(callspec.marks)
# todo: this is a hell of a hack
# https://github.com/pytest-dev/pytest/issues/4569
# Note: the order of the updates is important here; indicates what
# takes priority (ctor argument over function attributes over markers).
# Take own_markers only; NodeKeywords handles parent traversal on its own.
self.keywords.update((mark.name, mark) for mark in self.own_markers)
self.keywords.update(self.obj.__dict__)
if keywords:
self.keywords.update(keywords)
if fixtureinfo is None:
fm = self.session._fixturemanager
fixtureinfo = fm.getfixtureinfo(self, self.obj, self.cls)
self._fixtureinfo: FuncFixtureInfo = fixtureinfo
self.fixturenames = fixtureinfo.names_closure
self._initrequest()
# todo: determine sound type limitations
[docs]
@classmethod
def from_parent(cls, parent, **kw) -> "Self":
"""The public constructor."""
return super().from_parent(parent=parent, **kw)
def _initrequest(self) -> None:
self.funcargs: Dict[str, object] = {}
self._request = fixtures.TopRequest(self, _ispytest=True)
@property
def function(self):
"""Underlying python 'function' object."""
return getimfunc(self.obj)
@property
def instance(self):
try:
return self._instance
except AttributeError:
if isinstance(self.parent, Class):
# Each Function gets a fresh class instance.
self._instance = self._getinstance()
else:
self._instance = None
return self._instance
def _getinstance(self):
if isinstance(self.parent, Class):
# Each Function gets a fresh class instance.
return self.parent.newinstance()
else:
return None
def _getobj(self):
instance = self.instance
if instance is not None:
parent_obj = instance
else:
assert self.parent is not None
parent_obj = self.parent.obj # type: ignore[attr-defined]
return getattr(parent_obj, self.originalname)
@property
def _pyfuncitem(self):
"""(compatonly) for code expecting pytest-2.2 style request objects."""
return self
[docs]
def runtest(self) -> None:
"""Execute the underlying test function."""
self.ihook.pytest_pyfunc_call(pyfuncitem=self)
def setup(self) -> None:
self._request._fillfixtures()
def _traceback_filter(self, excinfo: ExceptionInfo[BaseException]) -> Traceback:
if hasattr(self, "_obj") and not self.config.getoption("fulltrace", False):
code = _pytest._code.Code.from_function(get_real_func(self.obj))
path, firstlineno = code.path, code.firstlineno
traceback = excinfo.traceback
ntraceback = traceback.cut(path=path, firstlineno=firstlineno)
if ntraceback == traceback:
ntraceback = ntraceback.cut(path=path)
if ntraceback == traceback:
ntraceback = ntraceback.filter(filter_traceback)
if not ntraceback:
ntraceback = traceback
ntraceback = ntraceback.filter(excinfo)
# issue364: mark all but first and last frames to
# only show a single-line message for each frame.
if self.config.getoption("tbstyle", "auto") == "auto":
if len(ntraceback) > 2:
ntraceback = Traceback(
(
ntraceback[0],
*(t.with_repr_style("short") for t in ntraceback[1:-1]),
ntraceback[-1],
)
)
return ntraceback
return excinfo.traceback
# TODO: Type ignored -- breaks Liskov Substitution.
[docs]
def repr_failure( # type: ignore[override]
self,
excinfo: ExceptionInfo[BaseException],
) -> Union[str, TerminalRepr]:
style = self.config.getoption("tbstyle", "auto")
if style == "auto":
style = "long"
return self._repr_failure_py(excinfo, style=style)
[docs]
class FunctionDefinition(Function):
"""This class is a stop gap solution until we evolve to have actual function
definition nodes and manage to get rid of ``metafunc``."""
[docs]
def runtest(self) -> None:
raise RuntimeError("function definitions are not supposed to be run as tests")
setup = runtest
