Testing code with promises about leakage HOT 3 CLOSED

const Leakage =  require('leakage');
var assert = require('assert');

describe('leaks', function() {

    let expected, actual;

    beforeEach(function() {
        expected = 0;
        actual = 0;
    });

    afterEach(function() {
        if (!expected || expected == actual) return;
          var err = new Error('expected ' + expected + ' assertions, got ' + actual);
          this.currentTest.emit('error', err);
    });

    it('leak test', function() {
        this.timeout(100000);
        expected = 181;

         return Leakage.iterate.async(async () => {
            let dummyPromise = new Promise((resolve) => {
               setTimeout(() => resolve('ok'), 1);
            });

            try {
                const result = await dummyPromise;
                assert.equal(result, 'ok');
                actual++;
            } catch (e) {
                throw 'this should not happen ' + e;
            }
        });
    })
});