hhhizzz commented on PR #9118:
URL: https://github.com/apache/arrow-rs/pull/9118#issuecomment-3752369923

   > > Here's the exists test:
   > > 
https://github.com/apache/arrow-rs/blob/13d497af2be5d91c1c57775b8a57487ca05babe3/parquet/src/arrow/async_reader/mod.rs#L1218
   > > 
   > > I think we can just add one more UT to test the skipping page with 
`RowSelectionPolicy` set to `Mask` instead of `Auto`
   > 
   > Shouldn't these test resolve to `Mask` by default? Can't assert it in the 
tests right now, because the `ReaderBuilder` is not exposed there.
   
   This test doesn’t cover the `Mask` strategy directly. Its purpose is to 
verify that `Mask` can fall back to `Selector` when page skipping is involved 
and the policy is `Auto`. Since the fallback has been removed, we need 
additional tests. I added more in this PR: 
[https://github.com/sdf-jkl/arrow-rs/pull/1](https://github.com/sdf-jkl/arrow-rs/pull/1)
 — feel free to review and merge any parts you want to keep.


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