47 lines
1.6 KiB
JavaScript
47 lines
1.6 KiB
JavaScript
const e = require('../core/elements');
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const { sleep } = require('../core/helpers');
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const { LOOP_INTERVAL, ELEMENT_WAIT_LONGER_TIME } = require('../core/constants');
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// loop 5 times, every LOOP_INTERVAL milliseconds, and check that all
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// videos displayed are changing by comparing a hash of their
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// displayed contents
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async function webcamContentCheck(test) {
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await test.waitForSelector(e.webcamVideoItem);
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await test.wasRemoved(e.webcamConnecting, ELEMENT_WAIT_LONGER_TIME);
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const repeats = 5;
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let check;
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for (let i = repeats; i >= 1; i--) {
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console.log(`loop ${i}`);
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const checkCameras = async () => {
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const videos = document.querySelectorAll('video');
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const lastVideoHash = document.lastVideoHash || {};
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document.lastVideoHash = lastVideoHash;
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for (let v = 0; v < videos.length; v++) {
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const video = videos[v];
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const canvas = document.createElement('canvas');
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const context = canvas.getContext('2d');
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context.drawImage(video, 0, 0, video.videoWidth, video.videoHeight);
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const pixel = context.getImageData(0, 0, video.videoWidth, video.videoHeight).data;
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const pixelHash = await window.crypto.subtle.digest('SHA-1', pixel);
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if (lastVideoHash[v]) {
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if (lastVideoHash[v] == pixelHash) {
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return false;
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}
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}
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lastVideoHash[v] = pixelHash;
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}
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return true;
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};
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check = await test.page.evaluate(checkCameras);
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if (!check) return false;
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await sleep(LOOP_INTERVAL);
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}
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return check === true;
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}
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exports.webcamContentCheck = webcamContentCheck;
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