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Diffstat (limited to 'lib/spack/external/pytest-fallback/_pytest/mark.py')
| -rw-r--r-- | lib/spack/external/pytest-fallback/_pytest/mark.py | 465 |
1 files changed, 465 insertions, 0 deletions
diff --git a/lib/spack/external/pytest-fallback/_pytest/mark.py b/lib/spack/external/pytest-fallback/_pytest/mark.py new file mode 100644 index 0000000000..454722ca2c --- /dev/null +++ b/lib/spack/external/pytest-fallback/_pytest/mark.py @@ -0,0 +1,465 @@ +""" generic mechanism for marking and selecting python functions. """ +from __future__ import absolute_import, division, print_function + +import inspect +import warnings +from collections import namedtuple +from operator import attrgetter +from .compat import imap +from .deprecated import MARK_PARAMETERSET_UNPACKING + + +def alias(name, warning=None): + getter = attrgetter(name) + + def warned(self): + warnings.warn(warning, stacklevel=2) + return getter(self) + + return property(getter if warning is None else warned, doc='alias for ' + name) + + +class ParameterSet(namedtuple('ParameterSet', 'values, marks, id')): + @classmethod + def param(cls, *values, **kw): + marks = kw.pop('marks', ()) + if isinstance(marks, MarkDecorator): + marks = marks, + else: + assert isinstance(marks, (tuple, list, set)) + + def param_extract_id(id=None): + return id + + id = param_extract_id(**kw) + return cls(values, marks, id) + + @classmethod + def extract_from(cls, parameterset, legacy_force_tuple=False): + """ + :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 legacy_force_tuple: + enforce tuple wrapping so single argument tuple values + don't get decomposed and break tests + + """ + + if isinstance(parameterset, cls): + return parameterset + if not isinstance(parameterset, MarkDecorator) and legacy_force_tuple: + return cls.param(parameterset) + + newmarks = [] + argval = parameterset + while isinstance(argval, MarkDecorator): + newmarks.append(MarkDecorator(Mark( + argval.markname, argval.args[:-1], argval.kwargs))) + argval = argval.args[-1] + assert not isinstance(argval, ParameterSet) + if legacy_force_tuple: + argval = argval, + + if newmarks: + warnings.warn(MARK_PARAMETERSET_UNPACKING) + + return cls(argval, marks=newmarks, id=None) + + @property + def deprecated_arg_dict(self): + return dict((mark.name, mark) for mark in self.marks) + + +class MarkerError(Exception): + + """Error in use of a pytest marker/attribute.""" + + +def param(*values, **kw): + return ParameterSet.param(*values, **kw) + + +def pytest_addoption(parser): + 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. " + "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." + ) + + group._addoption( + "-m", + action="store", dest="markexpr", default="", metavar="MARKEXPR", + help="only run tests matching given mark expression. " + "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') + + +def pytest_cmdline_main(config): + import _pytest.config + if config.option.markers: + config._do_configure() + tw = _pytest.config.create_terminal_writer(config) + for line in config.getini("markers"): + name, rest = line.split(":", 1) + tw.write("@pytest.mark.%s:" % name, bold=True) + tw.line(rest) + tw.line() + config._ensure_unconfigure() + return 0 + + +pytest_cmdline_main.tryfirst = True + + +def pytest_collection_modifyitems(items, config): + keywordexpr = config.option.keyword.lstrip() + matchexpr = config.option.markexpr + if not keywordexpr and not matchexpr: + return + # pytest used to allow "-" for negating + # but today we just allow "-" at the beginning, use "not" instead + # we probably remove "-" altogether soon + if keywordexpr.startswith("-"): + keywordexpr = "not " + keywordexpr[1:] + selectuntil = False + if keywordexpr[-1:] == ":": + selectuntil = True + keywordexpr = keywordexpr[:-1] + + remaining = [] + deselected = [] + for colitem in items: + if keywordexpr and not matchkeyword(colitem, keywordexpr): + deselected.append(colitem) + else: + if selectuntil: + keywordexpr = None + if matchexpr: + if not matchmark(colitem, matchexpr): + deselected.append(colitem) + continue + remaining.append(colitem) + + if deselected: + config.hook.pytest_deselected(items=deselected) + items[:] = remaining + + +class MarkMapping: + """Provides a local mapping for markers where item access + resolves to True if the marker is present. """ + + def __init__(self, keywords): + mymarks = set() + for key, value in keywords.items(): + if isinstance(value, MarkInfo) or isinstance(value, MarkDecorator): + mymarks.add(key) + self._mymarks = mymarks + + def __getitem__(self, name): + return name in self._mymarks + + +class KeywordMapping: + """Provides a local mapping for keywords. + Given a list of names, map any substring of one of these names to True. + """ + + def __init__(self, names): + self._names = names + + def __getitem__(self, subname): + for name in self._names: + if subname in name: + return True + return False + + +def matchmark(colitem, markexpr): + """Tries to match on any marker names, attached to the given colitem.""" + return eval(markexpr, {}, MarkMapping(colitem.keywords)) + + +def matchkeyword(colitem, keywordexpr): + """Tries to match given keyword expression to given collector item. + + 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. + """ + mapped_names = set() + + # Add the names of the current item and any parent items + import pytest + for item in colitem.listchain(): + if not isinstance(item, pytest.Instance): + mapped_names.add(item.name) + + # Add the names added as extra keywords to current or parent items + for name in colitem.listextrakeywords(): + mapped_names.add(name) + + # Add the names attached to the current function through direct assignment + if hasattr(colitem, 'function'): + for name in colitem.function.__dict__: + mapped_names.add(name) + + mapping = KeywordMapping(mapped_names) + if " " not in keywordexpr: + # special case to allow for simple "-k pass" and "-k 1.3" + return mapping[keywordexpr] + elif keywordexpr.startswith("not ") and " " not in keywordexpr[4:]: + return not mapping[keywordexpr[4:]] + return eval(keywordexpr, {}, mapping) + + +def pytest_configure(config): + config._old_mark_config = MARK_GEN._config + if config.option.strict: + MARK_GEN._config = config + + +def pytest_unconfigure(config): + MARK_GEN._config = getattr(config, '_old_mark_config', None) + + +class MarkGenerator: + """ Factory for :class:`MarkDecorator` objects - exposed as + a ``pytest.mark`` singleton instance. Example:: + + import pytest + @pytest.mark.slowtest + def test_function(): + pass + + will set a 'slowtest' :class:`MarkInfo` object + on the ``test_function`` object. """ + _config = None + + def __getattr__(self, name): + if name[0] == "_": + raise AttributeError("Marker name must NOT start with underscore") + if self._config is not None: + self._check(name) + return MarkDecorator(Mark(name, (), {})) + + def _check(self, name): + try: + if name in self._markers: + return + except AttributeError: + pass + self._markers = values = set() + for line in self._config.getini("markers"): + marker, _ = line.split(":", 1) + marker = marker.rstrip() + x = marker.split("(", 1)[0] + values.add(x) + if name not in self._markers: + raise AttributeError("%r not a registered marker" % (name,)) + + +def istestfunc(func): + return hasattr(func, "__call__") and \ + getattr(func, "__name__", "<lambda>") != "<lambda>" + + +class MarkDecorator: + """ A decorator for test functions and test classes. When applied + it will create :class:`MarkInfo` objects which may be + :ref:`retrieved by hooks as item keywords <excontrolskip>`. + MarkDecorator instances are often created like this:: + + 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 instance 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 itself 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 a MarkInfo object to the + function, containing all the arguments already stored internally in + the MarkDecorator. + 3. When called in any other case, it performs a 'fake construction' call, + i.e. 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 MarkDecorator objects from storing only a + single function or class reference as their positional argument with no + additional keyword or positional arguments. + + """ + + def __init__(self, mark): + assert isinstance(mark, Mark), repr(mark) + self.mark = mark + + name = alias('mark.name') + args = alias('mark.args') + kwargs = alias('mark.kwargs') + + @property + def markname(self): + return self.name # for backward-compat (2.4.1 had this attr) + + def __eq__(self, other): + return self.mark == other.mark if isinstance(other, MarkDecorator) else False + + def __repr__(self): + return "<MarkDecorator %r>" % (self.mark,) + + def with_args(self, *args, **kwargs): + """ return a MarkDecorator with extra arguments added + + unlike call this can be used even if the sole argument is a callable/class + + :return: MarkDecorator + """ + + mark = Mark(self.name, args, kwargs) + return self.__class__(self.mark.combined_with(mark)) + + def __call__(self, *args, **kwargs): + """ if passed a single callable argument: decorate it with mark info. + otherwise add *args/**kwargs in-place to mark information. """ + if args and not kwargs: + func = args[0] + is_class = inspect.isclass(func) + if len(args) == 1 and (istestfunc(func) or is_class): + if is_class: + store_mark(func, self.mark) + else: + store_legacy_markinfo(func, self.mark) + store_mark(func, self.mark) + return func + return self.with_args(*args, **kwargs) + + +def get_unpacked_marks(obj): + """ + obtain the unpacked marks that are stored on a object + """ + mark_list = getattr(obj, 'pytestmark', []) + + if not isinstance(mark_list, list): + mark_list = [mark_list] + return [ + getattr(mark, 'mark', mark) # unpack MarkDecorator + for mark in mark_list + ] + + +def store_mark(obj, mark): + """store a Mark on a 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) + [mark] + + +def store_legacy_markinfo(func, mark): + """create the legacy MarkInfo objects and put them onto the function + """ + if not isinstance(mark, Mark): + raise TypeError("got {mark!r} instead of a Mark".format(mark=mark)) + holder = getattr(func, mark.name, None) + if holder is None: + holder = MarkInfo(mark) + setattr(func, mark.name, holder) + else: + holder.add_mark(mark) + + +class Mark(namedtuple('Mark', 'name, args, kwargs')): + + def combined_with(self, other): + assert self.name == other.name + return Mark( + self.name, self.args + other.args, + dict(self.kwargs, **other.kwargs)) + + +class MarkInfo(object): + """ Marking object created by :class:`MarkDecorator` instances. """ + + def __init__(self, mark): + assert isinstance(mark, Mark), repr(mark) + self.combined = mark + self._marks = [mark] + + name = alias('combined.name') + args = alias('combined.args') + kwargs = alias('combined.kwargs') + + def __repr__(self): + return "<MarkInfo {0!r}>".format(self.combined) + + def add_mark(self, mark): + """ add a MarkInfo with the given args and kwargs. """ + self._marks.append(mark) + self.combined = self.combined.combined_with(mark) + + def __iter__(self): + """ yield MarkInfo objects each relating to a marking-call. """ + return imap(MarkInfo, self._marks) + + +MARK_GEN = MarkGenerator() + + +def _marked(func, mark): + """ Returns True if :func: is already marked with :mark:, False otherwise. + This can happen if marker is applied to class and the test file is + invoked more than once. + """ + try: + func_mark = getattr(func, mark.name) + except AttributeError: + return False + return mark.args == func_mark.args and mark.kwargs == func_mark.kwargs + + +def transfer_markers(funcobj, cls, mod): + """ + this function transfers class level markers and module level markers + into function level markinfo objects + + this is the main reason why marks are so broken + the resolution will involve phasing out function level MarkInfo objects + + """ + for obj in (cls, mod): + for mark in get_unpacked_marks(obj): + if not _marked(funcobj, mark): + store_legacy_markinfo(funcobj, mark) |