test: verify downstream scheduler reaches full in-flight cap

2026-09-09 23:52:03 +03:00
parent b65e04f01a
commit 0670c1d3df
1 changed files with 6 additions and 2 deletions
@@ -131,15 +131,19 @@ describe('relay downstream scheduling', () => {
    let acknowledged = 0;
    let maxFlight = 0;
    const pending = Array.from({ length: 400 }, () => scheduler.send(body(1)));
-    for (let round = 0; round < 8; round++) {
+    for (let round = 0; round < 12; round++) {
+      // Keep enough queued output to exercise growth all the way to the cap.
+      while (pending.length < sent.length + 400) pending.push(scheduler.send(body(1)));
      await tick();
      const delivered = sent.reduce((sum, frame) => sum + frame.length, 0);
      maxFlight = Math.max(maxFlight, delivered - acknowledged);
+      expect(delivered - acknowledged).toBeLessThanOrEqual(1024 * 1024);
      advance(200);
      scheduler.acknowledge(delivered);
      acknowledged = delivered;
    }
-    expect(maxFlight).toBeGreaterThan(256 * 1024);
+    // Reach the cap with a backlogged sender, allowing for whole-frame sizing.
+    expect(maxFlight).toBeGreaterThan(1024 * 1024 - body(1).length);
    // Keep the sender backlogged while ACK latency jumps to a second.
    for (let round = 0; round < 12; round++) {
      for (let i = 0; i < 30; i++) pending.push(scheduler.send(body(1)));