doesn't work with jest

[its-dibo]

when running the following code with node file.js it works, but when running the same code with jest it just runs continuously

  console.log('===1===');
  Promise.resolve().then((_data) => {
    console.log('===2===');
    data = _data;
    done = true;
  });
  deasync.loopWhile(() => !done);

console displays '====1===', but doesn't display '===2==='

[victorreinor]

I'm having the same problem, is there any way to solve this or is there a fix already?

[shmuel-krakower]

Same here, any workarounds are welcome

[ttxs25830]

same on me

[radiorz]

any solution ?

[wll8]

In native Node.js tests, it can also result in an infinite loop. For example, the following three code snippets, a and c are the same, but c cannot run successfully because it is inside a test.

node - v18.19.0
os - win10 x64
deasync - 0.1.30

const deasync = require('deasync');
const test = require('node:test');

function async2sync (fn) {
  return (...args) => {
    var done = false;
    var data;
    fn(...args).then((res) => {
      data = res
    }).catch(err => {
      throw err
    }).finally(() => {
      done = true
    })
    deasync.loopWhile(() => !done);
    return data
  }
}


{ // a
  console.log(1)
  console.log(async2sync(async () => 2)())
  console.log(3)
}


{ // b
  test('synchronous passing test', (t) => {
    console.log(1)
    console.log(2)
    console.log(3)
  });
}

{ // c
  test('synchronous passing test', (t) => {
    console.log(1)
    console.log(async2sync(async () => 2)())
    console.log(3)
  });
}

Using this code snippet also faces the same issue.

function async2sync (fn) {
  return (...args) => {
    return deasync(async (cb) => {
      const res = await fn(...args)
      cb(undefined, res)
    })()
  }
}