add test

Author: kevinjqliu

tests/table/test_init.py

@@ -1154,3 +1154,10 @@ def test_serialize_commit_table_request() -> None:
 
     deserialized_request = CommitTableRequest.model_validate_json(request.model_dump_json())
     assert request == deserialized_request
+
+
+def test_table_update_have_corresponding_dispatch() -> None:
+    from pyiceberg.table import TableUpdate, _apply_table_update
+    # every TableUpdate should have a corresponding `_apply_table_update` dispatch function
+
+    assert len(_apply_table_update.registry) == len(TableUpdate.__origin__.__args__)  # type: ignore