Github user icexelloss commented on a diff in the pull request:
https://github.com/apache/spark/pull/20217#discussion_r160859938
--- Diff: python/pyspark/sql/tests.py ---
@@ -4147,6 +4170,21 @@ def test_simple(self):
expected =
df.toPandas().groupby('id').apply(foo_udf.func).reset_index(drop=True)
self.assertFramesEqual(expected, result)
+ def test_registerGroupMapUDF(self):
--- End diff --
nit: test_register_group_map_udf
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