test: live AITUNNEL integration test, skipped without AITUNNEL_API_KEY

Refs #5

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QKHeGuAYh4W1jNdjMConZa

tests/integration/aitunnel.test.ts

@@ -0,0 +1,39 @@
+import { readFileSync } from 'node:fs';
+import { describe, expect, it } from 'vitest';
+import { DEFAULT_OPENAI, OpenAiTranscriber } from '../../src/core/openai';
+import type { HttpClient } from '../../src/core/ports';
+
+// Ключ — только из окружения, никогда в репозитории.
+const KEY = process.env.AITUNNEL_API_KEY ?? '';
+
+// Под Node нет requestUrl: тот же порт на fetch. contentType уходит заголовком.
+const fetchHttp: HttpClient = {
+  async post(req) {
+    const res = await fetch(req.url, {
+      method: 'POST',
+      headers: { ...req.headers, 'Content-Type': req.contentType },
+      body: req.body,
+    });
+    return { status: res.status, text: await res.text() };
+  },
+};
+
+// Характерные слова эталона tests/fixtures/test-01.txt.
+const WORDS = ['тестовая', 'запись', 'проверки', 'распознавания', 'речи', 'whisper'];
+
+describe.skipIf(!KEY)('AITUNNEL gpt-4o-transcribe (live)', () => {
+  it('transcribes test-01.m4a', { timeout: 120_000 }, async () => {
+    const audio = new Uint8Array(readFileSync(new URL('../fixtures/test-01.m4a', import.meta.url))).buffer;
+    const reference = readFileSync(new URL('../fixtures/test-01.txt', import.meta.url), 'utf8').toLowerCase();
+    for (const word of WORDS) expect(reference).toContain(word);
+
+    const t = new OpenAiTranscriber(fetchHttp, () => ({ ...DEFAULT_OPENAI, apiKey: KEY }), Math.random);
+    const result = await t.transcribe(audio, 'audio/mp4', new AbortController().signal);
+
+    expect(result).toMatchObject({ ok: true });
+    const text = result.ok ? result.text.toLowerCase() : '';
+    expect(text.trim()).not.toBe('');
+    const hits = WORDS.filter((w) => text.includes(w));
+    expect(hits.length, `распознано: ${text}`).toBeGreaterThanOrEqual(4);
+  });
+});