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test: assert fmt is idempotent in the integration queries #6199

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Merged
max-sixty merged 1 commit into from
Aug 17, 2026
Merged

test: assert fmt is idempotent in the integration queries #6199

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7 changes: 5 additions & 2 deletions prqlc/prqlc/tests/integration/queries.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -128,8 +128,11 @@ mod fmt {
assert_snapshot!(test_name, &formatted, &prql)
});

// Check the formatted queries can still compile
prqlc::prql_to_pl(&formatted).unwrap();
// Formatting is idempotent: re-parsing & re-formatting the output must
// reproduce it exactly. This also covers the weaker property that the
// formatted query still parses.
let reformatted = prqlc::pl_to_prql(&prqlc::prql_to_pl(&formatted).unwrap()).unwrap();
similar_asserts::assert_eq!(formatted, reformatted);
}
}

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