artillery/dist/lib/util/await-on-ee.js

Cloud-scale load testing. https://www.artillery.io

import sleep from "./sleep.js";
// Waits for an event, polling. Returns the event arguments, or null
// when maxWaitMs elapses first. NOTE: the timeout leaves the listener
// attached and does not reject - see modernization plan F17.
async function awaitOnEE(ee, message, pollMs = 1000, maxWaitMs = Infinity) {
    let messageFired = false;
    let args = null;
    let waitedMs = 0;
    ee.once(message, (...eventArgs) => {
        messageFired = true;
        args = eventArgs;
    });
    while (true && waitedMs < maxWaitMs) {
        if (messageFired) {
            break;
        }
        await sleep(pollMs);
        waitedMs += pollMs;
    }
    return args;
}
export default awaitOnEE;