pitrou commented on code in PR #47249:
URL: https://github.com/apache/arrow/pull/47249#discussion_r2281695488
##########
python/pyarrow/tests/test_compute.py:
##########
@@ -1952,6 +1952,48 @@ def test_fill_null_chunked_array(arrow_type):
assert result.equals(expected)
+def test_fill_null_windows_regression1():
+ arr = pa.array([True, False, False, False, False, None])
+ s = pa.scalar(True, type=pa.bool_())
+
+ result = pa.compute.call_function("coalesce", [arr, s])
+ expected = pa.array([True, False, False, False, False, True])
+
+ assert result.equals(expected)
+
+
+def test_fill_null_windows_regression2():
+ arr = pa.array([True, False, False, False, False, None])
+ s = True
+
+ result = pa.compute.call_function("coalesce", [arr, s])
+ expected = pa.array([True, False, False, False, False, True])
+
+ assert result.equals(expected)
+
+
+def test_fill_null_windows_regression4():
+ ty = pa.int64()
+ arr = pa.array([1, 2, 2, 2, 2, None], type=ty)
+ s = pa.scalar(1, type=ty)
+
+ result = pa.compute.call_function("coalesce", [arr, s])
+ expected = pa.array([1, 2, 2, 2, 2, 1], type=ty)
Review Comment:
```suggestion
arr = pa.array([1, 2, 3, 4, 5, None], type=ty)
s = pa.scalar(42, type=ty)
result = pa.compute.call_function("coalesce", [arr, s])
expected = pa.array([1, 2, 3, 4, 5, 42], type=ty)
```
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