[3.11] gh-94808: Cover PyFunction_GetCode, PyFunction_GetGlobals,… (#98317)

[3.11] gh-94808: Cover `PyFunction_GetCode`, `PyFunction_GetGlobals`, `PyFunction_GetModule` (GH-98158).
(cherry picked from commit 7b48d02)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>

Author: JelleZijlstra

Lib/test/test_capi.py

@@ -739,6 +739,41 @@ def method_example(self): ...
         self.assertEqual(_testcapi.eval_get_func_name(sum), "sum")  # c function
         self.assertEqual(_testcapi.eval_get_func_name(A), "type")
 
+    def test_function_get_code(self):
+        import types
+
+        def some():
+            pass
+
+        code = _testcapi.function_get_code(some)
+        self.assertIsInstance(code, types.CodeType)
+        self.assertEqual(code, some.__code__)
+
+        with self.assertRaises(SystemError):
+            _testcapi.function_get_code(None)  # not a function
+
+    def test_function_get_globals(self):
+        def some():
+            pass
+
+        globals_ = _testcapi.function_get_globals(some)
+        self.assertIsInstance(globals_, dict)
+        self.assertEqual(globals_, some.__globals__)
+
+        with self.assertRaises(SystemError):
+            _testcapi.function_get_globals(None)  # not a function
+
+    def test_function_get_module(self):
+        def some():
+            pass
+
+        module = _testcapi.function_get_module(some)
+        self.assertIsInstance(module, str)
+        self.assertEqual(module, some.__module__)
+
+        with self.assertRaises(SystemError):
+            _testcapi.function_get_module(None)  # not a function
+
 
 class TestPendingCalls(unittest.TestCase):
 

Modules/_testcapimodule.c

@@ -6081,6 +6081,43 @@ settrace_to_record(PyObject *self, PyObject *list)
 }
 
 static PyObject *negative_dictoffset(PyObject *, PyObject *);
+
+static PyObject *
+function_get_code(PyObject *self, PyObject *func)
+{
+    PyObject *code = PyFunction_GetCode(func);
+    if (code != NULL) {
+        Py_INCREF(code);
+        return code;
+    } else {
+        return NULL;
+    }
+}
+
+static PyObject *
+function_get_globals(PyObject *self, PyObject *func)
+{
+    PyObject *globals = PyFunction_GetGlobals(func);
+    if (globals != NULL) {
+        Py_INCREF(globals);
+        return globals;
+    } else {
+        return NULL;
+    }
+}
+
+static PyObject *
+function_get_module(PyObject *self, PyObject *func)
+{
+    PyObject *module = PyFunction_GetModule(func);
+    if (module != NULL) {
+        Py_INCREF(module);
+        return module;
+    } else {
+        return NULL;
+    }
+}
+
 static PyObject *test_buildvalue_issue38913(PyObject *, PyObject *);
 static PyObject *getargs_s_hash_int(PyObject *, PyObject *, PyObject*);
 static PyObject *getargs_s_hash_int2(PyObject *, PyObject *, PyObject*);
@@ -6382,6 +6419,9 @@ static PyMethodDef TestMethods[] = {
     {"get_feature_macros", get_feature_macros, METH_NOARGS, NULL},
     {"test_code_api", test_code_api, METH_NOARGS, NULL},
     {"settrace_to_record", settrace_to_record, METH_O, NULL},
+    {"function_get_code", function_get_code, METH_O, NULL},
+    {"function_get_globals", function_get_globals, METH_O, NULL},
+    {"function_get_module", function_get_module, METH_O, NULL},
     {NULL, NULL} /* sentinel */
 };