HyukjinKwon commented on code in PR #48651:
URL: https://github.com/apache/spark/pull/48651#discussion_r1823880564


##########
python/pyspark/sql/tests/test_connect_compatibility.py:
##########
@@ -60,16 +60,23 @@
     from pyspark.sql.connect.streaming.readwriter import DataStreamReader as 
ConnectDataStreamReader
     from pyspark.sql.connect.streaming.readwriter import DataStreamWriter as 
ConnectDataStreamWriter
 
+SPARK_CONNECT_ONLY = "spark_connect_only"
+
 
 class ConnectCompatibilityTestsMixin:
     def get_public_methods(self, cls):
         """Get public methods of a class."""
-        return {
-            name: method
-            for name, method in inspect.getmembers(cls)
-            if (inspect.isfunction(method) or isinstance(method, 
functools._lru_cache_wrapper))
-            and not name.startswith("_")
-        }
+        methods = {}
+        for name, method in inspect.getmembers(cls):
+            if (
+                inspect.isfunction(method) or isinstance(method, 
functools._lru_cache_wrapper)
+            ) and not name.startswith("_"):
+                source_lines = inspect.getsource(method).upper()
+                if "ONLY_SUPPORTED_WITH_SPARK_CONNECT" in source_lines:

Review Comment:
   I don't think we should rely on reading/checking the code itself in the 
test. This isn't what we meant for signature comparison / compatibility test.



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