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test(smoketests): log why concurrent HTTP/2 requests were rejected #847

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test(smoketests): log why concurrent HTTP/2 requests were rejected #847

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15 changes: 14 additions & 1 deletion tests/smoketests/scripts/verify-http2.mjs
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Original file line number Diff line number Diff line change
Expand Up @@ -93,10 +93,23 @@ try {
const N = 25;
const before = connectCount;
const client = newClient({ http2: true });
const results = await Promise.allSettled(Array.from({ length: N }, () => client.devboxes.list({ limit: 1 })));
const results = await Promise.allSettled(
Array.from({ length: N }, () => client.devboxes.list({ limit: 1 })),
);
const ok = results.filter((r) => r.status === 'fulfilled').length;
const opened = connectCount - before;
check(ok === N, `h2: ${N} concurrent requests all resolved (${ok}/${N})`);
// Print why requests were rejected, once per distinct reason, so a failure explains itself.
const reasons = new Map();
for (const r of results) {
if (r.status !== 'rejected') continue;
const e = r.reason;
const reason = [e?.constructor?.name, e?.status, e?.code ?? e?.cause?.code, e?.message ?? String(e)]
.filter((part) => part != null)
.join(' ');
reasons.set(reason, (reasons.get(reason) ?? 0) + 1);
}
for (const [reason, count] of reasons) console.log(` rejected x${count}: ${reason}`);
check(opened <= 4, `h2: ${N} concurrent requests multiplexed over <= 4 connections (opened ${opened})`);
} catch (e) {
check(false, `h2: concurrent multiplexing pass threw ${e?.constructor?.name}: ${e?.message}`);
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