How to test Nodejs API endpoints with Jasmine

I am trying to test my code with jasmine only. I have my route separated from the controller as seen below. The endpoints call model's functions which hit the database. I want to avoid hitting the database during testing. So, I was thinking of a way to mock the model's functions that the endpoints depend on but I don't know how to do so. Also, I don't know if there is a better way to test my endpoints without hitting the database.

jasmine test: UserController.spec.ts

/* eslint-disable no-undef */
import Request from 'request';
import { server } from '../../src/server';
import * as User from '../../src/api/models/User';

const urlAddress = 'http://localhost:3000';

describe('Server', () => {
  afterAll(() => {
    server.close();
  });
  describe('GET all users /', () => {
    const data = {};
    beforeAll((done) => {
      Request.get(`${urlAddress}/users`, (_error, response, body) => {
        data.status = response.statusCode;
        data.body = body;
        done();
      });
    });
    it('Status 200', () => {
      expect(data.status).toBe(200);
    });
  });
});

controller: UserController.ts

import { Router } from 'express';
import * as User from '../models/User';

export const UserController: Router = Router();

UserController.get('/', User.getUsers);

model: User.ts

import { Response, Request, NextFunction } from 'express';
import bcrypt from 'bcrypt';
import { pool, parseError } from '../db';

// define table
const table: string = 'users';

// set error message
// pool.on('error', (err, client) => `Error, ${err},  occured on ${client}`);

// select all users
const getUsers = (req: Request, res: Response, next: NextFunction) => {
  pool.query(`SELECT * FROM ${table};`, (error, results) => {
    if (error) {
      parseError(error);
      next(error);
    } else {
      res.status(200).json(results.rows);
    }
  });
};

router: routes.ts

import { Application, Router } from 'express';

import { UserController } from './controllers/UserController';

const _routes: [string, Router][] = [
  ['/users', UserController]
];

export const routes = (app: Application) => {
  _routes.forEach((route) => {
    const [url, controller] = route;
    app.use(url, controller);
  });
};