implementacao de interrupcao em audio streming

tests/js/vad.test.mjs

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+
+import assert from "node:assert/strict";
+import { test } from "node:test";
+import { VoiceActivityDetector } from "../../src/voice_assistant/audio_gateway/web/vad.js";
+
+test("detects speech start after minimum duration", () => {
+  let starts = 0;
+
+  const vad = new VoiceActivityDetector({
+    minSpeechMs: 250,
+    onSpeechStart: () => starts++,
+  });
+
+  vad.start();
+
+  vad.process(0.04, 0);
+  vad.process(0.04, 100);
+
+  assert.equal(starts, 0);
+
+  vad.process(0.04, 260);
+
+  assert.equal(starts, 1);
+});
+
+test("detects speech end after silence", () => {
+  let ends = 0;
+
+  const vad = new VoiceActivityDetector({
+    minSpeechMs: 100,
+    silenceMs: 800,
+    onSpeechEnd: () => ends++,
+  });
+
+  vad.start();
+
+  vad.process(0.04, 0);
+  vad.process(0.04, 120);
+  vad.process(0.04, 300);
+
+  vad.process(0.001, 600);
+  vad.process(0.001, 1000);
+
+  assert.equal(ends, 0);
+
+  vad.process(0.001, 1101);
+
+  assert.equal(ends, 1);
+});
+
+test("ignores short noise spikes", () => {
+  let starts = 0;
+
+  const vad = new VoiceActivityDetector({
+    minSpeechMs: 250,
+    onSpeechStart: () => starts++,
+  });
+
+  vad.start();
+
+  vad.process(0.05, 0);
+  vad.process(0.001, 80);
+  vad.process(0.001, 300);
+
+  assert.equal(starts, 0);
+});
+
+test("stop disables detection", () => {
+  let starts = 0;
+
+  const vad = new VoiceActivityDetector({
+    minSpeechMs: 100,
+    onSpeechStart: () => starts++,
+  });
+
+  vad.start();
+  vad.stop();
+
+  vad.process(0.05, 0);
+  vad.process(0.05, 200);
+
+  assert.equal(starts, 0);
+});