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memory-leak-heap.spec.js
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memory-leak-heap.spec.js
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const puppeteer = require('puppeteer');
// Inspiration: https://github.com/trentmwillis/devtools-protocol-demos/blob/master/testing-demos/memory-leak-by-heap.js
beforeAll(async () => {
this.browser = await puppeteer.launch();
});
afterAll(async () => {
await this.browser.close();
});
test('asserts memory leak by heap on the main page', async() => {
const page = await this.browser.newPage();
await page.goto('https://pptr.dev');
const protocol = await page.target().createCDPSession();
await protocol.send('HeapProfiler.enable');
await protocol.send('HeapProfiler.collectGarbage');
const startMetrics = await page.metrics();
// Do memory regressions here by interacting with the page
await protocol.send('Input.synthesizeScrollGesture', {
x: 100,
y: 100,
yDistance: -400,
repeatCount: 3
});
// Or just keep your app open for a certain amoun of time
await page.waitForTimeout(5000);
await protocol.send('HeapProfiler.collectGarbage');
const endMetrics = await page.metrics();
expect(endMetrics.JSHeapUsedSize < startMetrics.JSHeapUsedSize * 1.1).toBeTruthy();
await page.close();
}, 30000);