From 7b48d02933639c91ebd957b2326d8c352d8eddec Mon Sep 17 00:00:00 2001
From: Nikita Sobolev <mail@sobolevn.me>
Date: Sun, 16 Oct 2022 07:18:59 +0300
Subject: [PATCH] gh-94808: Cover `PyFunction_GetCode`,
 `PyFunction_GetGlobals`, `PyFunction_GetModule` (#98158)

---
 Lib/test/test_capi.py     | 35 +++++++++++++++++++++++++++++++++++
 Modules/_testcapimodule.c | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 74 insertions(+)

diff --git a/Lib/test/test_capi.py b/Lib/test/test_capi.py
index ae434c05baf..a2183cfb0fd 100644
--- a/Lib/test/test_capi.py
+++ b/Lib/test/test_capi.py
@@ -895,6 +895,41 @@ 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):
 
diff --git a/Modules/_testcapimodule.c b/Modules/_testcapimodule.c
index 76e619d11f9..624e878b20d 100644
--- a/Modules/_testcapimodule.c
+++ b/Modules/_testcapimodule.c
@@ -5658,6 +5658,42 @@ test_macros(PyObject *self, PyObject *Py_UNUSED(args))
     Py_RETURN_NONE;
 }
 
+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*);
@@ -5942,6 +5978,9 @@ static PyMethodDef TestMethods[] = {
     {"watch_dict", watch_dict, METH_VARARGS, NULL},
     {"unwatch_dict", unwatch_dict, METH_VARARGS, NULL},
     {"get_dict_watcher_events", get_dict_watcher_events, METH_NOARGS, 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 */
 };