test_ext_autodoc_mock.py

"""
    test_ext_autodoc_mock
    ~~~~~~~~~~~~~~~~~~~~~

    Test the autodoc extension.

    :copyright: Copyright 2007-2020 by the Sphinx team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

import abc
import sys
from importlib import import_module
from typing import TypeVar

import pytest

from sphinx.ext.autodoc.mock import _MockModule, _MockObject, ismock, mock


def test_MockModule():
    mock = _MockModule('mocked_module')
    assert isinstance(mock.some_attr, _MockObject)
    assert isinstance(mock.some_method, _MockObject)
    assert isinstance(mock.attr1.attr2, _MockObject)
    assert isinstance(mock.attr1.attr2.meth(), _MockObject)

    assert repr(mock.some_attr) == 'mocked_module.some_attr'
    assert repr(mock.some_method) == 'mocked_module.some_method'
    assert repr(mock.attr1.attr2) == 'mocked_module.attr1.attr2'
    assert repr(mock.attr1.attr2.meth) == 'mocked_module.attr1.attr2.meth'

    assert repr(mock) == 'mocked_module'


def test_MockObject():
    mock = _MockObject()
    assert isinstance(mock.some_attr, _MockObject)
    assert isinstance(mock.some_method, _MockObject)
    assert isinstance(mock.attr1.attr2, _MockObject)
    assert isinstance(mock.attr1.attr2.meth(), _MockObject)

    # subclassing
    class SubClass(mock.SomeClass):
        """docstring of SubClass"""

        def method(self):
            return "string"

    obj = SubClass()
    assert SubClass.__doc__ == "docstring of SubClass"
    assert isinstance(obj, SubClass)
    assert obj.method() == "string"
    assert isinstance(obj.other_method(), SubClass)

    # parametrized type
    T = TypeVar('T')

    class SubClass2(mock.SomeClass[T]):
        """docstring of SubClass"""

    obj2 = SubClass2()
    assert SubClass2.__doc__ == "docstring of SubClass"
    assert isinstance(obj2, SubClass2)


def test_mock():
    modname = 'sphinx.unknown'
    submodule = modname + '.submodule'
    assert modname not in sys.modules
    with pytest.raises(ImportError):
        import_module(modname)

    with mock([modname]):
        import_module(modname)
        assert modname in sys.modules
        assert isinstance(sys.modules[modname], _MockModule)

        # submodules are also mocked
        import_module(submodule)
        assert submodule in sys.modules
        assert isinstance(sys.modules[submodule], _MockModule)

    assert modname not in sys.modules
    with pytest.raises(ImportError):
        import_module(modname)


def test_mock_does_not_follow_upper_modules():
    with mock(['sphinx.unknown.module']):
        with pytest.raises(ImportError):
            import_module('sphinx.unknown')


@pytest.mark.skipif(sys.version_info < (3, 7), reason='Only for py37 or above')
def test_abc_MockObject():
    mock = _MockObject()

    class Base:
        @abc.abstractmethod
        def __init__(self):
            pass

    class Derived(Base, mock.SubClass):
        pass

    obj = Derived()
    assert isinstance(obj, Base)
    assert isinstance(obj, _MockObject)
    assert isinstance(obj.some_method(), Derived)


def test_mock_decorator():
    mock = _MockObject()

    @mock.function_deco
    def func():
        """docstring"""

    class Foo:
        @mock.method_deco
        def meth(self):
            """docstring"""

    @mock.class_deco
    class Bar:
        """docstring"""

    assert func.__doc__ == "docstring"
    assert Foo.meth.__doc__ == "docstring"
    assert Bar.__doc__ == "docstring"


def test_ismock():
    with mock(['sphinx.unknown']):
        mod1 = import_module('sphinx.unknown')
        mod2 = import_module('sphinx.application')

        class Inherited(mod1.Class):
            pass

        assert ismock(mod1) is True
        assert ismock(mod1.Class) is True
        assert ismock(Inherited) is False

        assert ismock(mod2) is False
        assert ismock(mod2.Sphinx) is False