1 files changed, 64 insertions, 14 deletions
diff --git a/tests/test_ext_autodoc_importer.py b/tests/test_ext_autodoc_importer.py
index 108d06d7c..08920cc7e 100644
--- a/tests/test_ext_autodoc_importer.py
+++ b/tests/test_ext_autodoc_importer.py
@@ -1,15 +1,34 @@
-# -*- coding: utf-8 -*-
 """
     test_ext_autodoc_importer
     ~~~~~~~~~~~~~~~~~~~~~~~~~
 
     Test the autodoc extension.
 
-    :copyright: Copyright 2007-2018 by the Sphinx team, see AUTHORS.
+    :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.ext.autodoc.importer import _MockObject, _MockModule
+import abc
+import sys
+
+import pytest
+
+from sphinx.ext.autodoc.importer import _MockModule, _MockObject, mock
+
+
+def test_MockModule():
+    mock = _MockModule('mocked_module', None)
+    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():
@@ -32,16 +51,47 @@ def test_MockObject():
     assert isinstance(obj.other_method(), SubClass)
 
 
-def test_MockModule():
-    mock = _MockModule('mocked_module', None)
-    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)
+def test_mock():
+    modname = 'sphinx.unknown'
+    submodule = modname + '.submodule'
+    assert modname not in sys.modules
+    with pytest.raises(ImportError):
+        __import__(modname)
 
-    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'
+    with mock([modname]):
+        __import__(modname)
+        assert modname in sys.modules
+        assert isinstance(sys.modules[modname], _MockModule)
 
-    assert repr(mock) == 'mocked_module'
+        # submodules are also mocked
+        __import__(submodule)
+        assert submodule in sys.modules
+        assert isinstance(sys.modules[submodule], _MockModule)
+
+    assert modname not in sys.modules
+    with pytest.raises(ImportError):
+        __import__(modname)
+
+
+def test_mock_does_not_follow_upper_modules():
+    with mock(['sphinx.unknown.module']):
+        with pytest.raises(ImportError):
+            __import__('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)