test(bindings/python): add test for pickle streaming load/write (#5272)

bindings/python/tests/test_pickle.py

@@ -0,0 +1,47 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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 pytest
+import pickle
+from datetime import datetime
+from uuid import uuid4
+
+
+@pytest.mark.need_capability("read", "write", "delete")
+def test_sync_file_pickle(service_name, operator, async_operator):
+    """
+    Test pickle streaming serialization and deserialization using OpenDAL operator.
+    """
+    data = {
+        "a": 1,
+        "b": "hello",
+        "c": [1, 2, 3],
+        "d": {"e": 4},
+        "f": None,
+        "g": b"hello\nworld",
+        "h": set([1, 2, 3]),
+        "i": 1.23,
+        "j": True,
+        "k": datetime.strptime("2024-01-01", "%Y-%m-%d"),
+    }
+
+    filename = f"random_file_{str(uuid4())}"
+    with operator.open(filename, "wb") as f:
+        pickle.dump(data, f)
+
+    with operator.open(filename, "rb") as f:
+        assert pickle.load(f) == data