Files
mokosh/tests/offscreen/codec-check.test.ts
Mark d7840a811c test(01-02): add RED codec-check tests
Two RED tests pin D-20 (codec strict-mode, no silent fallback):
- 'throws on unsupported vp9 and emits RECORDING_ERROR'
- 'does not throw when vp9 IS supported'

vi.resetModules() between tests is critical: module-load side-effects
(handshake + port connect) happen once per import, so isolation across
the four test files depends on it.

chrome.runtime is stubbed locally (no vitest-chrome dependency added,
per threat T-1-NEW-02-01 — minimize supply chain for four test files).
No 'as any' / no '@ts-ignore'; the cast is 'as unknown as T'.

Plan 03 must export assertCodecSupported() from src/offscreen/recorder.ts.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-15 17:24:18 +02:00

44 lines
1.5 KiB
TypeScript

import { describe, it, expect, vi, beforeEach } from 'vitest';
interface ChromeStub {
runtime: { sendMessage: ReturnType<typeof vi.fn> };
}
interface GlobalWithChrome {
chrome?: ChromeStub;
MediaRecorder?: { isTypeSupported: (mime: string) => boolean };
}
describe('codec strict mode', () => {
beforeEach(() => {
vi.resetModules();
(globalThis as unknown as GlobalWithChrome).chrome = {
runtime: { sendMessage: vi.fn() },
};
});
it('throws on unsupported vp9 and emits RECORDING_ERROR', async () => {
(globalThis as unknown as GlobalWithChrome).MediaRecorder = {
isTypeSupported: vi.fn().mockReturnValue(false),
};
const mod = await import('../../src/offscreen/recorder');
expect(() => mod.assertCodecSupported()).toThrow(/vp9 unsupported/);
const stub = (globalThis as unknown as GlobalWithChrome).chrome!;
expect(stub.runtime.sendMessage).toHaveBeenCalledWith(
expect.objectContaining({ type: 'RECORDING_ERROR' })
);
});
it('does not throw when vp9 IS supported', async () => {
(globalThis as unknown as GlobalWithChrome).MediaRecorder = {
isTypeSupported: vi.fn().mockReturnValue(true),
};
const mod = await import('../../src/offscreen/recorder');
expect(() => mod.assertCodecSupported()).not.toThrow();
const stub = (globalThis as unknown as GlobalWithChrome).chrome!;
expect(stub.runtime.sendMessage).not.toHaveBeenCalledWith(
expect.objectContaining({ type: 'RECORDING_ERROR' })
);
});
});