test: characterize Pingora Brotli response finalization - #115
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📝 WalkthroughWalkthroughBrotli 응답 스트림의 RED 계약을 문서화했습니다. 새 테스트는 ChangesBrotli 스트림 계약
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Change: Other Merge Risk: 🟡 Moderate · up to The new characterization test can fail the required test suite before the upstream Brotli fix is available, preventing normal merges. Keep it out of the ordinary CI path until it can be made GREEN or explicitly isolated. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 33.33% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 1 files. (1 skipped: 1 unsupported.)
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🧪 Generate unit tests (beta)
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Current-exact technical review only; not approval/governance credit. The two-path delta stays inside supplier characterization/focused doctoring, inherits exact Pingora 0.9.0 from #70, does not touch production composition or Cargo authority, and the desired-behavior oracle is fail-closed: Content-Encoding: br must be accepted by a strict Brotli decoder and reproduce the original bytes. No additional writer-safe defect found in this exact range. Hosted RED/GREEN is still unproven while the exact workflows remain queued, and #70's known stale-foundation coverage failure remains a separate parent-ancestry issue.
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In `@tests/brotli_response_compression_supplier_red.rs`:
- Around line 1-116: Remove the RED integration test file from the general tests
target so cargo test --all-targets does not execute it. Do not retain the
#[test] entry point or add unrelated CI exceptions; the test may only return
after being converted to a passing test or given an explicit isolated execution
path.
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docs/doctoring/BROTLI_RESPONSE_COMPRESSION_SUPPLIER_RED.mdtests/brotli_response_compression_supplier_red.rs
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Current-exact review after the RED-isolation repair: the desired-behavior Brotli assertion remains unchanged and production compression remains absent. Cargo.toml now excludes only this supplier target from the default feature graph; the dedicated workflow verifies that isolation before running the exact target, requires the strict-decoder rejection fingerprint, rejects an unexpected GREEN as a stale RED receipt, and does not use continue-on-error. Focused doctoring matches that transition. No additional writer-safe defect found in the current repair delta. This COMMENT is not an approval; exact CI/Supply/capacity/characterization runs remain authoritative.
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Current-exact technical review for 0afde3c2a5927a918005c999806fd477e03cf35b.
Fresh hosted RCA on predecessor c92a8e9c... is deterministic: Supply Chain, bounded-origin capacity, load-contract and OCI runtime were GREEN; ordinary CI failed only at Rust 1.98.0 cargo fmt --all -- --check in tests/brotli_response_compression_supplier_red.rs, before compile/test, Clippy, rustdoc, coverage and lock verification. The emitted diff rewrites only the Vary assertion layout.
Current exact is one ordinary commit ahead / behind 0 from c92a8e9c..., with exactly one changed file and no supplier oracle, supplier-red isolation, workflow, dependency, production gateway, compression capability, threshold or authority-boundary change. Existing Major isolation thread remains resolved.
Fresh exact CI/Supply/capacity/Brotli-characterization receipts must settle independently; predecessor GREEN/expected-RED receipts do not transfer. This COMMENT is technical evidence only, not approval or governance credit.
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Current-exact evidence review after hosted settlement. CI 35412564542, Supply Chain 35412564570, and PgErd bounded-origin capacity 35412564580 are terminal SUCCESS. Brotli Supplier Characterization 35412564567 / job 105814910953 also completed SUCCESS in its intended meaning: it proved the ordinary all-target graph excludes the feature-gated supplier RED and independently reproduced the strict-decoder rejection on the released Pingora 0.9.0 graph, then uploaded artifact 10580711728 (sha256:4307b3cdfdd7061d2a2dc7dd33cc2d58a26c317913010545b4020782d0fedbf2). This is not Brotli capability GREEN: production compression remains absent/fail-closed, upstream maintainer disposition and a release-qualified repaired supplier identity remain prerequisites. No additional writer-safe defect found on 0afde3c. COMMENT only; no approval or merge credit.
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Scope / authority
This is the executable supplier RED requested by #114. It characterizes Pingora 0.9.0 Brotli response finalization without enabling response compression in production, adding
ResponseCompressionBuilder, changing gateway Admin Config, copying a supplier patch, or moving product MIME/cache/auth/business policy into the shared gateway.Its historical merge-base with canonical parent #70 remains
df5d2f05fc5fbdd94bbfb487283bf2a6d73a55bf. Canonical #70 has since advanced ordinarily to Ready8a35a98e5704153f6138cd3d53311a237037b9c6, selecting exact crates.iopingora = "=0.9.0"/pingora-prometheus = "=0.9.0", and is waiting on fresh exact hosted CI/Supply/capacity evidence. Fresh compare against current #70 is ahead 6 / behind 357, merge-base exactlydf5d2f05..., with four effective child paths:.github/workflows/brotli-supplier-characterization.yml,Cargo.toml,docs/doctoring/BROTLI_RESPONSE_COMPRESSION_SUPPLIER_RED.md, andtests/brotli_response_compression_supplier_red.rs. This child therefore remains Draft and deliberately unreconciled until the current parent settles. No dependency or lockfile version change is introduced here; #70's foundation/release-lineage work remains parent-owned.Desired-behavior acceptance
tests/brotli_response_compression_supplier_red.rsuses Pingora's publicResponseCompressionCtxdirectly, outside production composition. It negotiatesAccept-Encoding: br, requiresContent-Encoding: brplusVary: Accept-Encoding, streams two body chunks, and sends the exact encoded bytes to Nodezlib.brotliDecompressSync. Desired behavior is strict decoder success plus byte-for-byte equality with the original representation.Pingora 0.9.0 is expected to fail that desired-behavior assertion because the supplier path flushes but does not finish the Brotli stream. Lenient browser/curl decoding is not accepted as GREEN. RFC 7932 / RFC 9110 rationale and promotion order are recorded in
docs/doctoring/BROTLI_RESPONSE_COMPRESSION_SUPPLIER_RED.md.RED isolation repair
The initial intentionally failing supplier acceptance was a normal auto-discovered integration test, while ordinary CI runs
cargo test --all-targets --locked --no-fail-fast. That would make repository CI RED for a known supplier defect rather than a repository regression.The isolation repair does not weaken ordinary CI:
95cb9f4a0ff34d056b0f9a0be7fcb2380db23d6badds an empty-defaultsupplier-redfeature and declares onlybrotli_response_compression_supplier_redwithrequired-features = ["supplier-red"];c5d1d20d34328d5a047b8a2cef827fc00ec2ecdbadds exact-SHA.github/workflows/brotli-supplier-characterization.yml;--all-targetsgraph excludes the supplier RED, then executes only the feature-gated acceptance and credits RED only when the exact strict-decoder rejection fingerprint is present;continue-on-erroris not used;c92a8e9c9dc467b86e967b9a7dbeb770fa58d784records this evidence boundary and later RED→GREEN transition in focused doctoring.CodeRabbit Major thread
PRRT_kwDOUKbfdc6j2h1jis resolved after this repair. The desired-behavior assertion is unchanged: once a release-qualified supplier repair makes it pass, the characterization wrapper must stop crediting RED and the same acceptance must move into ordinary GREEN evidence.Hosted RED → formatter repair → exact settlement
Predecessor exact
c92a8e9c9dc467b86e967b9a7dbeb770fa58d784reproduced the expected supplier RED but ordinary CI failed only on Rust 1.98.0 formatting. Ordinary successor0afde3c2a5927a918005c999806fd477e03cf35bapplies exactly that rustfmt delta and changes no oracle, feature isolation, workflow, dependency or production gateway behavior.The current child exact has fully settled on its historical parent identity:
35412564542: SUCCESS;35412564570: SUCCESS;35412564580: SUCCESS;35412564567, job105814910953: SUCCESS as the expected released-supplier RED receipt, not supplier GREEN.The characterization job passed exact checkout, Rust 1.98.0 installation, Node strict-decoder availability, the proof that the ordinary all-target graph excludes this supplier RED, the strict-decoder RED reproduction, and artifact upload. Current artifact
brotli-supplier-red-0afde3c2a5927a918005c999806fd477e03cf35bis ID10580711728, size 1198 bytes, digestsha256:4307b3cdfdd7061d2a2dc7dd33cc2d58a26c317913010545b4020782d0fedbf2, retained through 2026-09-26T07:50:56Z.This exact establishes both sides of the intended evidence boundary for the historical child identity: repository CI stays GREEN with the known supplier defect isolated, while the dedicated characterization independently proves the released Pingora 0.9.0/Brotli path still fails the unchanged strict-decoder acceptance. It does not establish Brotli capability readiness, and the evidence does not transfer to a future reconciliation onto current #70.
Current-exact technical COMMENT review
5253983802remains non-approval evidence.Promotion boundary
Current ancestry debt is ahead 6 / behind 357 versus #70
8a35a98e...; this is a repair finding, not a reason to close the child. Accepted order is:#70@8a35a98e... terminal current-head evidence -> this PR ordinary/non-force reconciliation onto that exact parent -> reacquire unchanged desired-behavior supplier RED plus ordinary CI/Supply/capacity on the reconciled child -> upstream maintainer disposition -> release-qualified Pingora identity -> same desired-behavior acceptance as ordinary GREEN -> explicit versioned gateway capability only for a real consumer requirement -> immutable gateway release -> consumer parity/shadow/canary/rollback/cutover.Do not append a handcrafted terminal byte, vendor an upstream fix, weaken the decoder, enable Brotli opportunistically, or infer gzip/zstd defects from this Brotli finding. Repository-wide baseline/APA TRACEABILITY authority remains #61. No protected merge, release, canary/shadow, cutover, or legacy-removal credit is claimed.