49 lines
1.8 KiB
JavaScript
49 lines
1.8 KiB
JavaScript
'use strict';
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const { CameraSwitch } = require('../src/cameraSwitch');
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// Testet die Entscheidungslogik von grabSnapshot() ohne Hardware:
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// _captureAt (FFmpeg) und _spawnLive sind gemockt.
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function makeSwitch(opts = {}) {
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const sw = new CameraSwitch({ id: 'camT', device: '/dev/null', liveSize: '640x480', ...opts });
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sw._captureAt = jest.fn(() => Promise.resolve(Buffer.from([0xFF, 0xD8, 9])));
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sw._spawnLive = jest.fn(() => { sw.proc = {}; sw.state = 'live'; });
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return sw;
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}
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describe('CameraSwitch.grabSnapshot', () => {
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test('Live läuft (latest gesetzt) → liefert latest, kein Capture', async () => {
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const sw = makeSwitch({ stream: true });
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sw.latest = Buffer.from([1, 2, 3]);
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const f = await sw.grabSnapshot();
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expect(f).toBe(sw.latest);
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expect(sw._captureAt).not.toHaveBeenCalled();
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});
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test('stream:false ohne latest → one-shot _captureAt an liveSize', async () => {
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const sw = makeSwitch({ stream: false });
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sw.latest = null;
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const f = await sw.grabSnapshot();
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expect(Buffer.isBuffer(f)).toBe(true);
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expect(sw._captureAt).toHaveBeenCalledTimes(1);
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expect(sw._captureAt.mock.calls[0][0]).toBe('640x480'); // size = liveSize
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expect(sw._spawnLive).not.toHaveBeenCalled(); // kein Dauer-Stream
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});
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test('Lock wird nach dem one-shot wieder freigegeben', async () => {
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const sw = makeSwitch({ stream: false });
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sw.latest = null;
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await sw.grabSnapshot();
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expect(sw.lock).toBe(false);
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expect(sw.state).toBe('stopped');
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});
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test('belegtes Gerät (lock) → Fehler, kein zweiter Capture', async () => {
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const sw = makeSwitch({ stream: false });
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sw.latest = null;
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sw.lock = true;
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await expect(sw.grabSnapshot()).rejects.toThrow(/belegt/i);
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expect(sw._captureAt).not.toHaveBeenCalled();
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});
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});
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