how to configure testing on a docker node mysql app - mysql

Question

I've created a node/mysql app and i have the following docker-compose.yaml file
version: "3.4"
x-common-variables: &common-variables
MYSQL_USER: sampleuser
MYSQL_PASSWORD: samplepassword
MYSQL_DATABASE: sampledb
services:
mysql-db:
image: mysql:5.7
container_name: mysql_container
environment:
<<: *common-variables
MYSQL_HOST: localhost
MYSQL_ROOT_PASSWORD: root
ports:
- 3308:3306
restart: always
volumes:
- ./db:/docker-entrypoint-initdb.d
phpmyadmin:
depends_on:
- mysql-db
image: phpmyadmin/phpmyadmin
container_name: phpadmin_container
environment:
PMA_HOST: mysql-db
links:
- mysql-db:mysql-db
ports:
- 8080:80
restart: always
server:
build: ./server
container_name: node_server_container
ports:
- 3000:3000
volumes:
- ./server:/app
working_dir: /app
depends_on:
- mysql-db
environment:
<<: *common-variables
MYSQL_HOST_IP: mysql-db
links:
- mysql-db
now, in the server sub directory i have a small node server
require('dotenv').config()
const express = require('express');
const setRouter = require('./routes/routes');
const port = process.env.PORT || 3000;
const app = express();
setRouter(app)
app.set('port', port);
app.use('/', (req, res) => {
return res.status(200).json({ statusCode: 200 })
});
// Listen on provided port, on all network interfaces.
app.listen(port, () => console.log(`API running on localhost:${port}`));
module.exports = app;
which connect to the mysql db:
'use strict';
const mysql = require('mysql2');
const options = {
host: process.env.MYSQL_HOST_IP,
user: process.env.MYSQL_USER,
password: process.env.MYSQL_PASSWORD,
database: process.env.MYSQL_DATABASE,
};
const pool = mysql.createPool(options);
const promisePool = pool.promise();
module.exports = promisePool;
I would like to test my endpoints, and i tried using jest and supertest but i failed miserably.
I'm trying something like this:
const app = require('../app')
const request = require('supertest');
describe('GET /users/:email', function() {
it('responds with json', async function(done) {
const res = await request(app).get('/users/Jupiter#planet.it')
expect(res.headers["Content-Type"]).toMatch(/json/);
});
});
Now, if i don't provide a .env i get a console log in my users route to print the error:
Error: Access denied for user ''#'localhost' (using password: NO)
if I provide a .env
MYSQL_HOST_IP=127.0.0.1:3306
MYSQL_USER=sampleuser
MYSQL_PASSWORD=samplepassword
MYSQL_DATABASE=sampledb
then I this error: Error: getaddrinfo ENOTFOUND 127.0.0.1:3306
How do i get to connect to the running container? (note that i run the test manually from the server folder after stopping the node container, not sure if there's a better solution)
Full repo can be found here