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kwasimensah avatar kwasimensah commented on June 10, 2024

I figured out my actual issue. Both extensions do proxying on equal/equals. If chaiAsPromised isn't last, the proxy from chaiExclude drops information about the subject being a promise. Runkit at https://runkit.com/kwasimensah/5efdfbea19e9950013f020e0

const chai = require("chai")
const chaiAsPromised = require("chai-as-promised");
const chaiExclude = require("chai-exclude")

//Passes in this order
chai.use(chaiExclude);
chai.use(chaiAsPromised);

// Causes UnhandledPromiseRejectionWarning in this order
//chai.use(chaiAsPromised);
//chai.use(chaiExclude);


const expect = chai.expect;

const promiseA = new Promise((resolve) => {
    setTimeout(()=>{
    resolve(null);
    }, 1000);
});

async function  main(){
    const bug = expect(promiseA).to.eventually.equal(6)
    console.trace(bug.then);
    await bug;
}

main().catch(err=>{});

More specifically, chai-excludes's assertEqual returns undefined, which means overwritingMethodWrapper creates newAssertion which drops the then attribute that transferPromisness added to the current assertion.

from chai-as-promised.

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