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"""mock for autodoc"""
from __future__ import annotations
import contextlib
import os
import sys
from importlib.abc import Loader, MetaPathFinder
from importlib.machinery import ModuleSpec
from types import MethodType, ModuleType
from typing import Any, Generator, Iterator, Sequence
from sphinx.util import logging
from sphinx.util.inspect import isboundmethod, safe_getattr
logger = logging.getLogger(__name__)
class _MockObject:
"""Used by autodoc_mock_imports."""
__display_name__ = '_MockObject'
__name__ = ''
__sphinx_mock__ = True
__sphinx_decorator_args__: tuple[Any, ...] = ()
def __new__(cls, *args: Any, **kwargs: Any) -> Any:
if len(args) == 3 and isinstance(args[1], tuple):
superclass = args[1][-1].__class__
if superclass is cls:
# subclassing MockObject
return _make_subclass(args[0], superclass.__display_name__,
superclass=superclass, attributes=args[2])
return super().__new__(cls)
def __init__(self, *args: Any, **kwargs: Any) -> None:
self.__qualname__ = self.__name__
def __len__(self) -> int:
return 0
def __contains__(self, key: str) -> bool:
return False
def __iter__(self) -> Iterator:
return iter([])
def __mro_entries__(self, bases: tuple) -> tuple:
return (self.__class__,)
def __getitem__(self, key: Any) -> _MockObject:
return _make_subclass(str(key), self.__display_name__, self.__class__)()
def __getattr__(self, key: str) -> _MockObject:
return _make_subclass(key, self.__display_name__, self.__class__)()
def __call__(self, *args: Any, **kwargs: Any) -> Any:
call = self.__class__()
call.__sphinx_decorator_args__ = args
return call
def __repr__(self) -> str:
return self.__display_name__
def _make_subclass(name: str, module: str, superclass: Any = _MockObject,
attributes: Any = None, decorator_args: tuple = ()) -> Any:
attrs = {'__module__': module,
'__display_name__': module + '.' + name,
'__name__': name,
'__sphinx_decorator_args__': decorator_args}
attrs.update(attributes or {})
return type(name, (superclass,), attrs)
class _MockModule(ModuleType):
"""Used by autodoc_mock_imports."""
__file__ = os.devnull
__sphinx_mock__ = True
def __init__(self, name: str) -> None:
super().__init__(name)
self.__all__: list[str] = []
self.__path__: list[str] = []
def __getattr__(self, name: str) -> _MockObject:
return _make_subclass(name, self.__name__)()
def __repr__(self) -> str:
return self.__name__
class MockLoader(Loader):
"""A loader for mocking."""
def __init__(self, finder: MockFinder) -> None:
super().__init__()
self.finder = finder
def create_module(self, spec: ModuleSpec) -> ModuleType:
logger.debug('[autodoc] adding a mock module as %s!', spec.name)
self.finder.mocked_modules.append(spec.name)
return _MockModule(spec.name)
def exec_module(self, module: ModuleType) -> None:
pass # nothing to do
class MockFinder(MetaPathFinder):
"""A finder for mocking."""
def __init__(self, modnames: list[str]) -> None:
super().__init__()
self.modnames = modnames
self.loader = MockLoader(self)
self.mocked_modules: list[str] = []
def find_spec(self, fullname: str, path: Sequence[bytes | str] | None,
target: ModuleType = None) -> ModuleSpec | None:
for modname in self.modnames:
# check if fullname is (or is a descendant of) one of our targets
if modname == fullname or fullname.startswith(modname + '.'):
return ModuleSpec(fullname, self.loader)
return None
def invalidate_caches(self) -> None:
"""Invalidate mocked modules on sys.modules."""
for modname in self.mocked_modules:
sys.modules.pop(modname, None)
@contextlib.contextmanager
def mock(modnames: list[str]) -> Generator[None, None, None]:
"""Insert mock modules during context::
with mock(['target.module.name']):
# mock modules are enabled here
...
"""
try:
finder = MockFinder(modnames)
sys.meta_path.insert(0, finder)
yield
finally:
sys.meta_path.remove(finder)
finder.invalidate_caches()
def ismockmodule(subject: Any) -> bool:
"""Check if the object is a mocked module."""
return isinstance(subject, _MockModule)
def ismock(subject: Any) -> bool:
"""Check if the object is mocked."""
# check the object has '__sphinx_mock__' attribute
try:
if safe_getattr(subject, '__sphinx_mock__', None) is None:
return False
except AttributeError:
return False
# check the object is mocked module
if isinstance(subject, _MockModule):
return True
# check the object is bound method
if isinstance(subject, MethodType) and isboundmethod(subject):
tmp_subject = subject.__func__
else:
tmp_subject = subject
try:
# check the object is mocked object
__mro__ = safe_getattr(type(tmp_subject), '__mro__', [])
if len(__mro__) > 2 and __mro__[-2] is _MockObject:
# A mocked object has a MRO that ends with (..., _MockObject, object).
return True
except AttributeError:
pass
return False
def undecorate(subject: _MockObject) -> Any:
"""Unwrap mock if *subject* is decorated by mocked object.
If not decorated, returns given *subject* itself.
"""
if ismock(subject) and subject.__sphinx_decorator_args__:
return subject.__sphinx_decorator_args__[0]
else:
return subject
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