add test

pola-rs · Aug 9, 2024 · 3be3ac0 · 3be3ac0
1 parent 8ac4760
commit 3be3ac0
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/py-polars/tests/unit/io/test_parquet.py b/py-polars/tests/unit/io/test_parquet.py
@@ -1400,3 +1400,14 @@ def test_write_sliced_lists_18069() -> None:
     after = pl.read_parquet(f)
 
     assert_frame_equal(before, after)
+
+
+def test_null_array_dict_pages_18085() -> None:
+    test = pd.DataFrame(
+        [{"A": np.NaN, "B": 3, "C": None}, {"A": np.NaN, "B": None, "C": None}]
+    )
+
+    f = io.BytesIO()
+    test.to_parquet(f)
+    f.seek(0)
+    pl.read_parquet(f)