test(e2e): wait for what the spec asserts, not for something written before it - #1222
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…before it Three specs have been failing intermittently on the thread-per-core leg, a different one each run, and all three assert on something no wait ever covered. `ratelimit-e2e` seeded its rate-limit policy AFTER the caller key and gated on the key, so the policy could still be in flight when the first burst ran and both calls came back 200. `upstream-header-context-e2e` gated on the first of two caller keys and then asserted with the second, which is seeded after it — a 401. Both are the race `tests/e2e/AGENTS.md` already names: a readiness gate proves only that everything written up to the gated resource has landed. The policy now precedes the key, and the gate is the later key. `client-cancel-usage-1571-e2e` read `app.output()` once, immediately after the request, looking for that request's access-log line. The gateway hands every event to a bounded queue drained by a dedicated writer thread so the request path never blocks on the log descriptor, and the harness then drains the child's pipe from its own event loop; neither hop is ordered against the HTTP response. The failure dump shows the captured output ending at the previous test's line. Four specs had already grown their own private polling helper for that second race, with the same comment on each. This adds one `waitForLogLine` / `waitForLogLines` to the harness, replaces the four copies, and converts the remaining sites that read a line their own request produced: the drain-complete assertions (the exit event can precede the last of the pipe), the cooldown exclusion and attempt-failure lines, the custom-guardrail diagnostic, the guardrail-index rebuild counts and the cache-degradation warning. A single `output()` read is still correct for a line written before `spawnApp` resolved, and the specs that only assert those are left alone. No product change: the data plane publishes the snapshot before it advances anything that reports it, so no surface ever claimed a configuration it was not already serving.
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📝 WalkthroughWalkthroughThe E2E harness now waits for complete, asynchronously delivered log lines and exposes response request IDs. E2E cases use shared waits and FIFO barriers for log assertions. Selected setup tests wait for policy or configuration propagation. ChangesE2E synchronization updates
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Other Merge Risk: 🔵 Low · up to The cancellation E2E test can scan logs before its synchronization barrier is reached, leaving a narrow source of flaky or inaccurate test results. Tighten the predicate before merging. 🚥 Pre-merge checks | ✅ 5 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (5 passed)
Full details: E2e Test Quality ReviewExplanation Major issue: the new Resolution Replace ✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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Inline comments:
In `@tests/e2e/src/cases/cooldown-opt-in-e2e.test.ts`:
- Around line 295-298: In the cooldown opt-in test, replace the one-shot
app.output() filtering and failure-count assertion with waitForLogLine for the
request-generated “routing target attempt failed” entry. Import and use
waitForLogLine, then assert the returned line contains “excl-primary” and
“fallback_on_statuses=[418]”, preserving the existing log validation.
In `@tests/e2e/src/harness/logs.test.ts`:
- Line 33: Replace the wall-clock assertion in the waitForLogLine test with an
output() call count, and assert that the immediate path invokes output exactly
once. Remove the Date.now()/started timing logic while preserving the existing
log-line behavior.
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📒 Files selected for processing (19)
tests/e2e/AGENTS.mdtests/e2e/src/cases/cache-hit-attribution-1571-e2e.test.tstests/e2e/src/cases/cache-redis-outage-e2e.test.tstests/e2e/src/cases/client-cancel-usage-1571-e2e.test.tstests/e2e/src/cases/cooldown-opt-in-e2e.test.tstests/e2e/src/cases/graceful-drain-e2e.test.tstests/e2e/src/cases/graceful-drain-h2-e2e.test.tstests/e2e/src/cases/graceful-drain-sse-e2e.test.tstests/e2e/src/cases/guardrail-aliyun-request-id-e2e.test.tstests/e2e/src/cases/guardrail-custom-verdict-diagnostics-e2e.test.tstests/e2e/src/cases/guardrail-index-invalidation-e2e.test.tstests/e2e/src/cases/mcp-request-logging-e2e.test.tstests/e2e/src/cases/provider-request-id-logging-e2e.test.tstests/e2e/src/cases/ratelimit-e2e.test.tstests/e2e/src/cases/realtime-ws-e2e.test.tstests/e2e/src/cases/upstream-header-context-e2e.test.tstests/e2e/src/harness/index.tstests/e2e/src/harness/logs.test.tstests/e2e/src/harness/logs.ts
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Review findings on the first commit, all of the same shape as the bug it fixes: a wait that settles earlier than the claim it is supposed to support. `waitForLogLines(…, n, …)` returns the instant the nth line is visible, so it bounds a count from below and never from above — three assertions of the form "exactly n" were therefore incapable of failing. The cache-degradation one was worse: the WARN it waited for was written six requests earlier, so the wait was satisfied before the requests the count is actually about had reached the log at all. The barrier that settles all of them is a later request's own access-log line — everything its predecessors wrote is ahead of it in a queue that is FIFO end to end. `ProxyClient` now returns the gateway's request id so a spec can name that line, `cache-redis-outage` pins its last request, `client-cancel-usage-1571` issues one plain request after the abandoned stream, and `guardrail-index-invalidation` gets it from its own `chat` helper — which also fixes the reverse direction there, where the AISIX-Cloud#1542 assertion (thirty unrelated writes must rebuild nothing) was reading a count the rebuild line may not have reached yet. Two more from the same pass: `waitForLogLine` was matching against a buffer with no line framing, so a predicate anchored on an early field could return a half-delivered line whose later fields are simply missing — a false pass for the specs that assert a field is absent. It now considers only newline-terminated lines. And the helper's own test asserted a wall-clock bound; it counts `output()` calls instead. `tests/e2e/AGENTS.md` states the upper-bound rule and the FIFO exemption it rests on, so the next spec does not re-derive either.
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Inline comments:
In `@tests/e2e/src/cases/client-cancel-usage-1571-e2e.test.ts`:
- Line 445: Update the waitForLogLine predicate near the barrier access-log
check to require both the "proxy request completed" marker and the barrierId
request ID, ensuring the completion line is observed before the exact-count
scan.
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📒 Files selected for processing (9)
tests/e2e/AGENTS.mdtests/e2e/src/cases/cache-redis-outage-e2e.test.tstests/e2e/src/cases/client-cancel-usage-1571-e2e.test.tstests/e2e/src/cases/cooldown-opt-in-e2e.test.tstests/e2e/src/cases/guardrail-index-invalidation-e2e.test.tstests/e2e/src/harness/index.tstests/e2e/src/harness/logs.test.tstests/e2e/src/harness/logs.tstests/e2e/src/harness/proxy.ts
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- tests/e2e/src/cases/cooldown-opt-in-e2e.test.ts
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The per-attempt `provider call completed` line renders `request_id` the same way the access log does — deliberately, so an operator greps the two alike (`crates/aisix-obs/src/usage.rs`) — so a predicate that only names the id matches it too, and it is written first. The barrier then means less than its name says.
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Problem
The
e2e (vitest, thread-per-core) + coveragejob has been failingintermittently on
main, a different test each run:client-cancel-usage-1571-e2e› "an ordinary completed request names its target on the line too" —no 200 access-log line for <request_id>ratelimit-e2e› "suspension window pauses the policy; leaving it resumes the same bucket" —expected 200 to be 429upstream-header-context-e2e› "default_headers render request-context variables; unresolved ones are dropped" —expected 401 to be 200All three assert on something that no wait in the spec ever covered. Two
recent changes made the windows wide enough to hit: configuration applies
now run on a background-priority thread, and log events now go through a
queue drained by a dedicated writer thread instead of being written from
the thread that produced them.
Mechanism
The two configuration failures are the race
tests/e2e/AGENTS.mdalready names. Seeded resources reach the gateway as watch events
applied in revision order, so gating on resource N proves only that
everything written up to N has landed.
ratelimit-e2ewrote its rate-limit policy after the caller key andgated on the key. When the policy was still in flight, the burst that
must go
200then429came back200twice.upstream-header-context-e2eseeds two caller keys and asserts withboth, but gated on the first —
TEAMLESS_PLAINTEXTis written after itand had not authenticated yet, so the request was refused with
401.That gate was also a
chat()call, which the same file forbids: itexercises the behaviour under test.
The third is a log-visibility race. The gateway hands every event to a
bounded queue drained by a dedicated writer thread, so the request path
never blocks on the log descriptor (
crates/aisix-obs/src/log_writer.rs),and the harness then drains the child's pipe from its own event loop.
Neither hop is ordered against the HTTP response. The spec read
app.output()once, immediately after the request; the failure dump showsthe captured output ending at the previous test's line.
Fix
Seed order and gates, so each gate implies what its spec asserts: the
rate-limit policy now precedes the caller key, and the header-context gate
is the later of its two keys, moved into
beforeAllas aProxyClient.listModels()probe.For the log race, one shared
waitForLogLine/waitForLogLinesin theharness. Four specs had already grown a private copy of that poll loop,
each carrying the same comment about the delivery lag; those four now use
the shared helper, and the remaining sites that read a line their own
request produced are converted — the drain-complete assertions (the exit
event can precede the last of the pipe), the cooldown exclusion and
attempt-failure lines, the custom-guardrail unknown-action diagnostic, the
guardrail-index rebuild counts, and the cache-degradation warning. A
single
output()read is still correct for a line written beforespawnAppresolved (boot warnings, a configuration rejected at startup),and the specs that assert only those are unchanged.
tests/e2e/AGENTS.mdgains the log-visibility rule next to the readinessone.
Behaviour change
None. This is test-side only. The data plane stores the new snapshot
before anything that reports it advances, so no surface —
/status/config,readiness, the control-plane status report, the
aisix_config_*series —ever claimed a configuration the gateway was not already serving.
Test
waitForLogLine/waitForLogLinesare covered bytests/e2e/src/harness/logs.test.ts, against a gateway whose output gainsthe line only after a delay — the shape a real one always has. Replacing
the poll with the single bare read this PR removes turns two of its four
cases red.
The gate fixes are structural rather than statistical: the assertion that
failed now sits behind a gate that provably implies it, by the ordering
rule the harness documents. The three specs were run locally against a
real binary and etcd under
E2E_THREAD_PER_CORE=true, together with everyother spec this PR touches.
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