Merged in ticosax/pytest/mock-unittest-252 (pull request #184)

Injection of fixture doesn't work when decorated with unittest.mock.patch

_pytest/python.py

@@ -1861,6 +1861,29 @@ class FixtureDef:
         return ("<FixtureDef name=%r scope=%r baseid=%r >" %
                 (self.argname, self.scope, self.baseid))
 
+def handle_mock_module_patching(function, startindex):
+    """
+    Special treatment when test_function is decorated
+    by mock.patch
+    """
+    for candidate_module_name in ('mock', 'unittest.mock'):
+        # stdlib comes last, because mock might be also installed
+        # as a third party with upgraded version compare to
+        # unittest.mock
+        try:
+            mock = sys.modules[candidate_module_name]
+        except KeyError:
+            pass
+        else:
+            for patching in getattr(function, "patchings", []):
+                if (not patching.attribute_name
+                        and patching.new is mock.DEFAULT):
+                    startindex += 1
+            break
+    else:
+        startindex += len(getattr(function, "patchings", []))
+    return startindex
+
 def getfuncargnames(function, startindex=None):
     # XXX merge with main.py's varnames
     #assert not inspect.isclass(function)
@@ -1870,13 +1893,7 @@ def getfuncargnames(function, startindex=None):
     if startindex is None:
         startindex = inspect.ismethod(function) and 1 or 0
     if realfunction != function:
-        mock = sys.modules.get('mock')
-        if mock is not None:
-            for patching in getattr(function, "patchings", []):
-                if not patching.attribute_name and patching.new is mock.DEFAULT:
-                    startindex += 1
-        else:
-            startindex += len(getattr(function, "patchings", []))
+        startindex = handle_mock_module_patching(function, startindex)
         function = realfunction
     argnames = inspect.getargs(py.code.getrawcode(function))[0]
     defaults = getattr(function, 'func_defaults',

testing/python/integration.py

@@ -112,6 +112,26 @@ class TestMockDecoration:
         reprec = testdir.inline_run()
         reprec.assertoutcome(passed=1)
 
+    def test_unittest_mock_and_fixture(self, testdir):
+        pytest.importorskip("unittest.mock")
+        testdir.makepyfile("""
+            import os.path
+            import unittest.mock
+            import pytest
+
+            @pytest.fixture
+            def inject_me():
+                pass
+
+            @unittest.mock.patch.object(os.path, "abspath",
+                                        new=unittest.mock.MagicMock)
+            def test_hello(inject_me):
+                import os
+                os.path.abspath("hello")
+        """)
+        reprec = testdir.inline_run()
+        reprec.assertoutcome(passed=1)
+
     def test_mock(self, testdir):
         pytest.importorskip("mock", "1.0.1")
         testdir.makepyfile("""