Can't save to MongoDB when using beforeEach() in jestjs - mongodb

Question

I was writing a couple of tests to my test database but I can't seem to save a document('add user to database' test) . When I run the test I get the correct length of the number of users but when I actually go to the database I only see one user document(firstUser) and cannot see the newUser document. I think it is an issue with the beforeEach function as when I remove it, everything works with the only issue being the same user being repeatedly added to the database when the test is run.
Test Code
const supertest = require('supertest')
const mongoose = require('mongoose')
const app = require('../app')
const User = require('../models/user')
const bcrypt = require('bcrypt')
const api = supertest(app)
beforeEach(async () => {
await User.deleteMany({})
const passwordHash = await bcrypt.hash('12345',10)
const firstUser = new User(
{
username: "Big Mark",
password: passwordHash,
name:"Mark"
}
)
await firstUser.save()
})
describe('user tests', () => {
// Cannot see this document in mongoDB
test('add user to database', async () => {
const newUser = {
username: 'smart',
password: 'dvsgfd',
name: 'Kevin'
}
const result = await api.post('/api/users').send(newUser).expect(201)
const length = await api.get('/api/users')
expect(length._body).toHaveLength(2)
console.log("length is", length)
})
test('see if fetching works', async () => {
const fetchedUsers = await api.get('/api/users').expect(201)
})
// test('returns 404 error if username already exists', async () => {
// })
})
afterAll(() => {
mongoose.connection.close()
},100000)
Router Code
const userRouter = require('express').Router()
const User = require('../models/user')
const bcrypt = require('bcrypt')
userRouter.post('/', async (request,response) => {
console.log("request body is", request.body)
const {username,password,name} = request.body
const alreadyThere = await User.findOne({username})
if(alreadyThere == null && username.length > 2 && password.length > 2) {
const saltRounds = 10 //How many times password it gonna get hashed (Ex: 2^n times)
const passwordHash = await bcrypt.hash(password,saltRounds)
const user = new User(
{
username,
password: passwordHash,
name
}
)
const savedUser = await user.save()
console.log("SavedUser is", savedUser)
response.status(201).json({savedUser})
}
else {
response.status(404).json({error: "Username must be unique"})
}
})
userRouter.get('/', async(request,response) => {
const users = await User.find({})
response.status(201).json(users)
})
module.exports = userRouter