test(parquet): unit-test ParquetImporter with mapping tests + offline fixture#60
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… fixture The importer was only exercised by network-downloading integration tests. Add fast, offline coverage in the parquet module itself: - Deterministic type-mapping tests (mapDType / filterColumns made package-private) covering every supported physical type, all INT32 widths, signed/unsigned INT64, timestamp units, string-like BYTE_ARRAY annotations, and the unsupported-type / unknown-column error paths. - A committed 11 KB fixture (delta_encoding_optional_column.parquet from apache/parquet-testing, Apache-2.0) drives end-to-end import → VortexReader assertions: schema, row count, column values, projection, and multi-chunk split. Adds vortex-reader + aircompressor-v3 as test-scope deps so the imported Vortex output can be decoded in-module. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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The importer was only exercised by network-downloading integration tests. Add
fast, offline coverage in the parquet module itself:
covering every supported physical type, all INT32 widths, signed/unsigned INT64,
timestamp units, string-like BYTE_ARRAY annotations, and the unsupported-type /
unknown-column error paths.
apache/parquet-testing, Apache-2.0) drives end-to-end import → VortexReader
assertions: schema, row count, column values, projection, and multi-chunk split.
Adds vortex-reader + aircompressor-v3 as test-scope deps so the imported Vortex
output can be decoded in-module.
Co-Authored-By: Claude Opus 4.8 noreply@anthropic.com