HyukjinKwon commented on a change in pull request #31429:
URL: https://github.com/apache/spark/pull/31429#discussion_r568326045
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File path: python/pyspark/sql/tests/test_pandas_map.py
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@@ -112,6 +112,14 @@ def func(iterator):
expected = df.collect()
self.assertEqual(actual, expected)
+ def test_self_join(self):
+ # SPARK-34319: self-join with MapInPandas
+ df1 = self.spark.range(10)
+ df2 = df1.mapInPandas(lambda iter: iter, 'id long')
+ actual = df2.join(df2).collect()
+ expected = df1.join(df1).collect()
+ self.assertEqual(actual, expected)
Review comment:
```suggestion
self.assertEqual(sorted(actual), sorted(expected))
```
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