Recover analyzer DSP and realtime pipeline corrections

scripts/test_websocket_runtime.mjs

@@ -0,0 +1,36 @@
+import assert from 'node:assert/strict';
+
+const base = process.env.PHOENIX_TEST_WS_BASE || 'ws://127.0.0.1:8789';
+
+function openSocket(path) {
+  return new Promise((resolve, reject) => {
+    const socket = new WebSocket(`${base}${path}`);
+    socket.addEventListener('open', () => resolve(socket), { once: true });
+    socket.addEventListener('error', () => reject(new Error(`failed to open ${path}`)), { once: true });
+  });
+}
+
+const sockets = await Promise.all([
+  openSocket('/api/v1/metrics/ws'),
+  openSocket('/api/v1/spectro/ws'),
+  openSocket('/api/v1/visuals/ws'),
+]);
+const [metrics] = sockets;
+let count = 0;
+let lastSeq = 0;
+let invalidPayload = false;
+metrics.addEventListener('message', (event) => {
+  const frame = JSON.parse(String(event.data));
+  const seq = Number(frame.seq);
+  if (seq <= lastSeq || 'spectro' in frame || 'wave_env' in frame || 'xy_l' in frame || 'wave_l' in frame) {
+    invalidPayload = true;
+  }
+  lastSeq = seq;
+  count += 1;
+});
+
+await new Promise((resolve) => setTimeout(resolve, 1100));
+sockets.forEach((socket) => socket.close());
+assert.equal(invalidPayload, false, 'metrics must be ordered and contain no large visual payloads');
+assert.ok(count >= 50 && count <= 75, `expected about 60 metrics/s, received ${count}`);
+console.log(`runtime websocket test passed (${count} metrics in 1.1 s; all three streams opened)`);