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Ethan Arrowood
c3189d436e
Replaces the `for await (const _ of source) {}` discard idiom with
dump(), which says what it does and does not need an eslint-disable
for the unused loop variable. The eslint-disable directives and
comments that become redundant are removed with it.
Only files that already declare --experimental-stream-iter are
converted, so no test gains an experimental flag it did not already
opt into. Files still using the old idiom are left as they are;
converting them would change what those tests run under and belongs
in a separate discussion.
Loops that break early are left alone: those cancel the source rather
than reading it to completion, which is not what dump() does.
Assisted-by: Claude Opus 5
Signed-off-by: Ethan Arrowood <ethan@arrowood.dev>
PR-URL: https://github.com/nodejs/node/pull/65598
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
60 lines
1.9 KiB
JavaScript
60 lines
1.9 KiB
JavaScript
// Flags: --experimental-quic --experimental-stream-iter --no-warnings
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// Test: initialRtt session option is accepted and the session functions
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// correctly with a custom initial RTT estimate.
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import { hasQuic, skip, mustCall } from '../common/index.mjs';
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import assert from 'node:assert';
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import { dump } from 'node:stream/iter';
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if (!hasQuic) {
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skip('QUIC is not enabled');
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}
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const { listen, connect } = await import('../common/quic.mjs');
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const { bytes } = await import('stream/iter');
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const encoder = new TextEncoder();
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const payload = encoder.encode('hello rtt');
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const serverDone = Promise.withResolvers();
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// Use a low initialRtt (1ms) to simulate a low-latency environment.
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// The session should complete successfully and the smoothed RTT in
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// stats should converge to a value well below the default 333ms.
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const serverEndpoint = await listen(mustCall((serverSession) => {
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serverSession.onstream = mustCall(async (stream) => {
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const data = await bytes(stream);
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assert.ok(data.byteLength > 0);
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stream.writer.endSync();
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await stream.closed;
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serverSession.close();
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serverDone.resolve();
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});
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}), {
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initialRtt: 1, // 1ms
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});
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const clientSession = await connect(serverEndpoint.address, {
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initialRtt: 1, // 1ms
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});
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await clientSession.opened;
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const stream = await clientSession.createBidirectionalStream({
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body: payload,
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});
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await dump(stream);
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await stream.closed;
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await serverDone.promise;
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// After data exchange, the smoothed RTT should have converged to a
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// realistic value. On loopback it should be well under 10ms (10,000,000ns).
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// The stat is in nanoseconds.
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const smoothedRtt = clientSession.stats.smoothedRtt;
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assert.ok(smoothedRtt > 0n, 'smoothedRtt should be non-zero after data exchange');
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assert.ok(smoothedRtt < 10_000_000n,
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`smoothedRtt should be under 10ms on loopback, got ${smoothedRtt}ns`);
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await clientSession.close();
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await serverEndpoint.close();
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