Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves - mocha.js

Question

I have tried to insert the value in db in my mocha test i am getting this error i tried few of the following ways but nothing work out.
var assert=require('chai').assert;
const user=require('../model/user')
i tried both way
describe('insertDataLasone',()=>{
it('should save the value ',(done)=>{
var User = new user({fname:'test'});
User.save().then(done=>{
done()
}).catch(done=>done())
})
})
describe('User', function() {
describe('#save()', function() {
// this.timeout(5000)
it('should save without error', function(done) {
var User5 = new user({fname:'test'});
User5.save(function(done) {
if (err) done(err);
else setTimeout(done,3000);
});
});
});
});

Answer 1

This error occurs when done() is not called in a test. Make sure you are calling done().
var assert = require('chai').assert;
const User = require('../model/user');
describe('insertDataLasone', () => {
it('should save the value ', done => {
var user = new User({ fname: 'test' });
user.save().then(() => {
done();
})
.catch(done); // mocha done accepts Error instance
});
});
or
var assert = require('chai').assert;
const User = require('../model/user');
describe('User', function() {
describe('#save()', function() {
it('should save without error', function(done) {
var user5 = new User({ fname: 'test' });
user5.save(function(err) {
if (err) done(err);
else done();
});
});
});
});
Read https://mochajs.org/#asynchronous-code carefully