pitrou commented on code in PR #45549:
URL: https://github.com/apache/arrow/pull/45549#discussion_r1957954279
##########
python/pyarrow/tests/parquet/test_metadata.py:
##########
@@ -794,3 +794,28 @@ def
test_column_chunk_key_value_metadata(parquet_test_datadir):
assert key_value_metadata1 == {b'foo': b'bar', b'thisiskeywithoutvalue':
b''}
key_value_metadata2 = metadata.row_group(0).column(1).metadata
assert key_value_metadata2 is None
+
+
+def test_internal_class_instantiation():
+ def msg(c):
+ return f"Can't instantiate internal class {c}"
+
+ with pytest.raises(TypeError) as excinfo:
+ pq.Statistics()
+ assert excinfo.value == msg("Statistics")
Review Comment:
For the record, you could also use the `match` parameter. Though checking
`excinfo.value` is fine as well.
```suggestion
with pytest.raises(TypeError, match=msg("Statistics")) as excinfo:
pq.Statistics()
```
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