fix

electron/sound-check.test.ts

@@ -0,0 +1,25 @@
+import assert from 'node:assert/strict'
+import { test } from 'node:test'
+import { soundCheckWav } from './sound-check.js'
+
+test('проверочный WAV содержит два коротких тона с паузой и умеренной амплитудой', () => {
+  assert.equal(soundCheckWav.toString('ascii', 0, 4), 'RIFF')
+  assert.equal(soundCheckWav.toString('ascii', 8, 16), 'WAVEfmt ')
+  assert.equal(soundCheckWav.readUInt32LE(4), soundCheckWav.length - 8)
+  assert.equal(soundCheckWav.readUInt16LE(20), 1)
+  assert.equal(soundCheckWav.readUInt16LE(22), 1)
+  assert.equal(soundCheckWav.readUInt16LE(34), 16)
+  const rate = soundCheckWav.readUInt32LE(24)
+  assert.equal(soundCheckWav.readUInt32LE(40) / (rate * 2), 1)
+  let first = 0
+  let second = 0
+  for (let index = 0; index < rate; index++) {
+    const amplitude = Math.abs(soundCheckWav.readInt16LE(44 + index * 2))
+    assert.ok(amplitude <= 6553)
+    if (index < rate * 0.05 || (index >= rate * 0.45 && index < rate * 0.55) || index >= rate * 0.95)
+      assert.equal(amplitude, 0)
+    if (index < rate * 0.5) first += amplitude
+    else second += amplitude
+  }
+  assert.ok(first > 0 && second > 0)
+})