Fix #8164: autodoc: Classes that inherit mocked class are not documented

Use ismock() to check a module member is a mocked or not. It allows not
to skip subclasses of mocked class.

5 files changed, 43 insertions, 2 deletions

diff --git a/CHANGES b/CHANGES
index 895293b7f..b23778176 100644
--- a/CHANGES
+++ b/CHANGES
@@ -16,6 +16,8 @@ Features added
 Bugs fixed
 ----------
 
+* #8164: autodoc: Classes that inherit mocked class are not documented
+
 Testing
 --------
 
diff --git a/sphinx/ext/autodoc/__init__.py b/sphinx/ext/autodoc/__init__.py
index 85f9f6de2..a1c642703 100644
--- a/sphinx/ext/autodoc/__init__.py
+++ b/sphinx/ext/autodoc/__init__.py
@@ -28,7 +28,7 @@ from sphinx.deprecation import (RemovedInSphinx40Warning, RemovedInSphinx50Warni
 from sphinx.environment import BuildEnvironment
 from sphinx.ext.autodoc.importer import (get_class_members, get_module_members,
                                          get_object_members, import_object)
-from sphinx.ext.autodoc.mock import mock
+from sphinx.ext.autodoc.mock import ismock, mock
 from sphinx.locale import _, __
 from sphinx.pycode import ModuleAnalyzer, PycodeError
 from sphinx.util import inspect, logging
@@ -731,7 +731,7 @@ class Documenter:
                 isprivate = membername.startswith('_')
 
             keep = False
-            if safe_getattr(member, '__sphinx_mock__', None) is not None:
+            if ismock(member):
                 # mocked module or object
                 pass
             elif self.options.exclude_members and membername in self.options.exclude_members:
diff --git a/tests/roots/test-ext-autodoc/target/need_mocks.py b/tests/roots/test-ext-autodoc/target/need_mocks.py
index 275ce8d5f..bc227f246 100644
--- a/tests/roots/test-ext-autodoc/target/need_mocks.py
+++ b/tests/roots/test-ext-autodoc/target/need_mocks.py
@@ -28,4 +28,9 @@ class TestAutodoc(object):
         return None
 
 
+class Inherited(missing_module.Class):
+    """docstring"""
+    pass
+
+
 sphinx.missing_module4.missing_function(len(missing_name2))
diff --git a/tests/test_ext_autodoc_automodule.py b/tests/test_ext_autodoc_automodule.py
new file mode 100644
index 000000000..2fd20a611
--- /dev/null
+++ b/tests/test_ext_autodoc_automodule.py
@@ -0,0 +1,31 @@
+"""
+    test_ext_autodoc_autocmodule
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Test the autodoc extension.  This tests mainly the Documenters; the auto
+    directives are tested in a test source file translated by test_build.
+
+    :copyright: Copyright 2007-2020 by the Sphinx team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import sys
+
+import pytest
+
+from .test_ext_autodoc import do_autodoc
+
+
+@pytest.mark.sphinx('html', testroot='ext-autodoc',
+                    confoverrides={'autodoc_mock_imports': ['missing_module',
+                                                            'missing_package1',
+                                                            'missing_package2',
+                                                            'missing_package3',
+                                                            'sphinx.missing_module4']})
+@pytest.mark.usefixtures("rollback_sysmodules")
+def test_subclass_of_mocked_object(app):
+    sys.modules.pop('target', None)  # unload target module to clear the module cache
+
+    options = {'members': True}
+    actual = do_autodoc(app, 'module', 'target.need_mocks', options)
+    assert '.. py:class:: Inherited(*args: Any, **kwargs: Any)' in actual
diff --git a/tests/test_ext_autodoc_configs.py b/tests/test_ext_autodoc_configs.py
index ac0a2c11c..979c66d47 100644
--- a/tests/test_ext_autodoc_configs.py
+++ b/tests/test_ext_autodoc_configs.py
@@ -429,7 +429,10 @@ def test_autoclass_content_and_docstring_signature_both(app):
 
 
 @pytest.mark.sphinx('html', testroot='ext-autodoc')
+@pytest.mark.usefixtures("rollback_sysmodules")
 def test_mocked_module_imports(app, warning):
+    sys.modules.pop('target', None)  # unload target module to clear the module cache
+
     # no autodoc_mock_imports
     options = {"members": 'TestAutodoc,decoratedFunction,func'}
     actual = do_autodoc(app, 'module', 'target.need_mocks', options)