mocha async test is timing out - node.js

Question

Hi I am new to testing with Mocha let alone async testing. I keep getting the following error when running this test. I have spend a lot of time researching the resolution on the web but no luck.
Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.
it('Should fail to create new user due to missing email', (done) => {
const user_empty_email = {
name: "First Name",
email: "",
password: "password",
isAdmin: false
}
chai.request(app).post('/v1/users')
.send(user_empty_email)
.then((res) => {
expect(res).to.have.status(400);
done();
}).catch(done)
})
Below is an example response I am getting fir the /v1/users
{
"user": {
"_id": "5de4293d3501dc21d2c5293c",
"name": "Test Person",
"email": "testemail#gmail.com",
"password": "$2a$08$8us1C.thHWsvFw3IRX6o.usskMasZVAyrmccTNBjxpNQ8wrhlBt6q",
"isAdmin": false,
"tokens": [
{
"_id": "5de4293d3501dc21d2c5293d",
"token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI1ZGU0MjkzZDM1MDFkYzIxZDJjNTI5M2MiLCJpYXQiOjE1NzUyMzM4NTN9.mi4YyYcHCvdYrl7OuI5eDwJ8xQyKWDcqgKsXRYtn0kw"
}
],
"__v": 1
},
"token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI1ZGU0MjkzZDM1MDFkYzIxZDJjNTI5M2MiLCJpYXQiOjE1NzUyMzM4NTN9.mi4YyYcHCvdYrl7OuI5eDwJ8xQyKWDcqgKsXRYtn0kw"
}

Answer 1

why don't you try increasing the timeout in (ms), it's normal for tests to run slow especially when your testing network requests.
package.json
"test": "mocha --timeout 10000"

Answer 2

Is there a chance that your endpoint actually takes more than 2 seconds to run? If so, you might want to increase the timeout when running Mocha: Change default timeout for mocha.
Also, does your endpoint return a response? If not, increasing the timeout will not help. Could you add the code of the /v1/users endpoint to your question to look into that possibility?

Answer 3

Not sure about this. But as far as i recall mixing Promises and callback-style (done-callback) can cause such problems in mocha.
Try using Promises only:
remove all done from test
actually return the Promise (return chai.request...)

Answer 4

the issue was this test:
mongoDB-connect.js
It was ran before the others. mongoDB connection was being closed which caused the other tests to timeout. When I removed the close command all tests passed as expected.
"use strict";
// NPM install mongoose and chai. Make sure mocha is globally
// installed
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const chai = require('chai');
const expect = chai.expect;
// Create a new schema that accepts a 'name' object.
// 'name' is a required field
const testSchema = new Schema({
name: { type: String, required: true }
});
// mongoose connect options
var options = {
useNewUrlParser: true,
useUnifiedTopology: true
}
//Create a new collection called 'Name'
const Name = mongoose.model('Name', testSchema);
describe('Database Tests', function() {
//Before starting the test, create a sandboxed database connection
//Once a connection is established invoke done()
before(function (done) {
// mongoose.connect('mongodb://localhost:27017',options);
mongoose.connect('mongodb://ip/testDatabase',options);
const db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error'));
db.once('open', function() {
console.log('We are connected to test database!');
done();
});
});
describe('Test Database', function() {
//Save object with 'name' value of 'Mike"
it('New name saved to test database', function(done) {
var testName = Name({
name: 'Mike'
});
testName.save(done);
});
it('Dont save incorrect format to database', function(done) {
//Attempt to save with wrong info. An error should trigger
var wrongSave = Name({
notName: 'Not Mike'
});
wrongSave.save(err => {
if(err) { return done(); }
throw new Error('Should generate error!');
});
});
it('Should retrieve data from test database', function(done) {
//Look up the 'Mike' object previously saved.
Name.find({name: 'Mike'}, (err, name) => {
if(err) {throw err;}
if(name.length === 0) {throw new Error('No data!');}
done();
});
});
});
//After all tests are finished drop database and close connection
after(function(done){
mongoose.connection.db.dropDatabase(function(){
mongoose.connection.close(done);
});
});
});