chore: import upstream snapshot with attribution

tests/testing_utils.py

@@ -0,0 +1,50 @@
+# Copyright (c) 2026 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.
+
+from pathlib import Path
+
+TEST_DATA_DIR = Path(__file__).parent / "test_files"
+
+
+def check_simple_inference_result(result, *, expected_length=1):
+    assert result is not None
+    assert isinstance(result, list)
+    assert len(result) == expected_length
+    for res in result:
+        assert isinstance(res, dict)
+
+
+def check_wrapper_simple_inference_param_forwarding(
+    monkeypatch,
+    wrapper,
+    wrapped_obj_attr_name,
+    input,
+    params,
+):
+    def _dummy_predict(input, **params):
+        yield params
+
+    monkeypatch.setattr(
+        getattr(wrapper, wrapped_obj_attr_name), "predict", _dummy_predict
+    )
+
+    result = getattr(wrapper, "predict")(
+        input,
+        **params,
+    )
+
+    assert isinstance(result, list)
+    assert len(result) == 1
+    for k, v in params.items():
+        assert result[0][k] == v