chore: import upstream snapshot with attribution

test/compat/test__C_api.py

@@ -0,0 +1,34 @@
+# Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import unittest
+
+import paddle
+
+
+class TestCAPI(unittest.TestCase):
+    def test_glibcxx_use_cxx11_abi(self):
+        val = paddle._C._GLIBCXX_USE_CXX11_ABI
+        self.assertIsInstance(
+            val, bool, "_GLIBCXX_USE_CXX11_ABI should return a bool"
+        )
+
+    def test_get_custom_class_python_wrapper_not_found(self):
+        with self.assertRaises(Exception) as cm:
+            paddle._C._get_custom_class_python_wrapper("fake_ns", "FakeClass")
+        self.assertIn("not found", str(cm.exception).lower())
+
+
+if __name__ == "__main__":
+    unittest.main()