test(writer): property + mutation coverage for Delta/AlpRd encoders#106
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Add seeded-random round-trip property tests for the fastlanes.delta and vortex.alprd encoders, and bring both under the writer pitest scope. - Delta: cover all eight integer ptypes and sizes 0/1/5/1024/1025/3000, exercising the multi-chunk loop, cross-chunk transpose and offset-slice tail that the prior <16-element cases never reached; assert the zone-map min/max stats (signed int64 + unsigned uint64 ordering) and the empty no-stats guard. - AlpRd: bit-exact round-trip over random finite f32/f64 across the same sizes, hitting the exception-heavy and multi-chunk paths. - Add accepts() coverage for both sides. Pitest: Delta survivors 22->8, writer test strength 82%->85%. The remaining survivors are round-trip-invariant (Delta internal base/padding representation; AlpRd dictionary-selection heuristic) and are pinned by the Rust interop and file-size integration tests, not by Java round-trips. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Adds seeded-random round-trip property tests for the
fastlanes.deltaandvortex.alprdencoders, and brings both under the writer pitest scope.FL_CHUNK_SIZE=1024). Asserts zone-map min/max stats (signed int64 + unsigned uint64 ordering) and the empty no-stats guard.accepts()coverage for both sides.Pitest: Delta survivors 22→8, writer test strength 82%→85%. Remaining survivors are round-trip-invariant (Delta internal base/padding representation; AlpRd dictionary-selection heuristic) and are pinned by the Rust interop + file-size integration tests, not Java round-trips.
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