Enable file downloading for Headless Chrome using TestCafe internal API

test.js

import path from 'path';
import { Selector } from 'testcafe';

async function enableDownloadForHeadlessChrome (t) {
    const browserConnection = t.testRun.browserConnection;
    const client            = browserConnection.provider.plugin.openedBrowsers[browserConnection.id].client;
    const { Network, Page } = client;

    await Promise.all([
        Network.enable(),
        Page.enable()
    ]);

    Network.requestWillBeSent((param) => {
        // console.log("Network.requestWillBeSent: " + JSON.stringify(param));
    });

    Network.responseReceived((param) => {
        // console.log("Network.responseReceived: " + JSON.stringify(param));
    });

    await Page.setDownloadBehavior({
        behavior:     'allow',
        downloadPath: path.resolve(__dirname, 'downloaded')
    });
}

fixture`test`
    .page`https://github.com/DevExpress/testcafe/`;

test('test', async t => {
    await enableDownloadForHeadlessChrome(t);
    await t.click(Selector('summary').withText('Clone or download'));
    await t.click(Selector('a').withText('Download ZIP'));

    //NOTE: please replace with string with your function which detects that the file exists
    await t.wait(60000);
})

await browser.browserClient.getActiveClient();
returns undefined.