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test(http3): verify request encoding with independent QPACK peers - #38
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hatoo
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October 21, 2026 09:54
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An incorrect QPACK name or length can pass tests that pair the request encoder with its own decoding logic. Add an independent pylsqpack oracle that checks all 52 static names, ordered duplicates, empty/UTF-8 values, literal fallback, length boundaries, large fields, and zero dynamic-table state across 437 request blocks.
Seventeen live aioquic cases verify exact headers, every request-body byte, FIN, and bilateral response counts through small flow-control windows. A new h3/quinn integration test checks repeated standard headers and a 70 KB POST through loss, duplication, and reordering. The Python oracle runs in required CI with pinned decoder versions.
Validation: 513 unit tests and 63 integration tests pass in both debug and release; strict all-target Clippy and formatting pass. The independent oracle completes 544 exact responses and validates 2,240,128 request-body bytes. A deliberately corrupted literal name is rejected; the same oracle also rejects an incorrect static index in a separate experimental encoder.
This PR changes tests, an encoder probe, documentation, and CI. Production source, dependencies, and Cargo.lock are unchanged. It makes no performance claim.