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[SPARK-55600][PYTHON][TEST][FOLLOW-UP] Fix test to verify row count preservation with 0-column schema #54962

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[SPARK-55600][PYTHON][TEST][FOLLOW-UP] Fix test to verify row count preservation with 0-column schema #54962

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6 changes: 3 additions & 3 deletions python/pyspark/sql/tests/test_conversion.py
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Original file line number Diff line number Diff line change
Expand Up @@ -191,11 +191,11 @@ def test_convert(self):
result = PandasToArrowConversion.convert(df, schema)
self.assertEqual(result.num_rows, 0)

# Empty schema (0 columns)
# TODO(SPARK-55350): Pandas - > PyArrow should preserve row count with 0 columns. It is a bug.
# Empty schema (0 columns) should preserve row count
df = pd.DataFrame({"a": [1, 2, 3], "b": [4.0, 5.0, 6.0]})
result = PandasToArrowConversion.convert(df, StructType([]))
self.assertEqual(result.num_columns, 0)
self.assertEqual(result.num_rows, 0)
self.assertEqual(result.num_rows, 3)

def test_convert_assign_cols_by_name(self):
"""Test assign_cols_by_name reorders columns to match schema."""
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