1 files changed, 152 insertions, 0 deletions
diff --git a/tests/test_extensions/test_ext_autodoc_mock.py b/tests/test_extensions/test_ext_autodoc_mock.py
new file mode 100644
index 0000000..3b90693
--- /dev/null
+++ b/tests/test_extensions/test_ext_autodoc_mock.py
@@ -0,0 +1,152 @@
+"""Test the autodoc extension."""
+
+from __future__ import annotations
+
+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, undecorate
+
+
+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']):  # NoQA: SIM117
+        with pytest.raises(ImportError):
+            import_module('sphinx.unknown')
+
+
+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():
+        pass
+
+    class Foo:
+        @mock.method_deco
+        def meth(self):
+            pass
+
+        @classmethod
+        @mock.method_deco
+        def class_meth(cls):
+            pass
+
+    @mock.class_deco
+    class Bar:
+        pass
+
+    @mock.funcion_deco(Foo)
+    class Baz:
+        pass
+
+    assert undecorate(func).__name__ == "func"
+    assert undecorate(Foo.meth).__name__ == "meth"
+    assert undecorate(Foo.class_meth).__name__ == "class_meth"
+    assert undecorate(Bar).__name__ == "Bar"
+    assert undecorate(Baz).__name__ == "Baz"
+
+
+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(mod1.submod.Class) is True
+        assert ismock(Inherited) is False
+
+        assert ismock(mod2) is False
+        assert ismock(mod2.Sphinx) is False