ConnectionManager does not work in unit testing

[vlourme]

Hello! I'm facing a problem with TypeORM ConnectionManager and FoalTS Unit Testing.

When running the project with npm run develop, everything works fine. But when trying unit testing, the connection to the DB is not made (using MongoDB).

Here are some files and logs from the project:

ormconfig.js

const { Config } = require('@foal/core');

module.exports = {
  type: 'mongodb',
  url: Config.get('database.url', 'string'),
  useNewUrlParser: true,
  useUnifiedTopology: true,
  logging: true,
  entities: ['./build/app/entities/*.entity.js'],
};

Logs after running npm run test:

[ ... ]
[1]   1) AuthController
[1]        has a "register" method that
[1]          should return an HttpResponseOK.:
[1]      ConnectionNotFoundError: Connection "default" was not found.
[1]       at new ConnectionNotFoundError (src/error/ConnectionNotFoundError.ts:8:9)
[1]       at ConnectionManager.get (src/connection/ConnectionManager.ts:40:19)
[1]       at Object.getMongoRepository (src/index.ts:308:35)
[1]       at Auth.findUser (src/app/services/auth.service.ts:9:24)
[1]       at Auth.userExists (src/app/services/auth.service.ts:20:26)
[1]       at Auth.addUser (src/app/services/auth.service.ts:24:20)
[1]       at AuthController.createUser (src/app/controllers/auth.controller.ts:20:55)
[1]       at Context.<anonymous> (src/app/controllers/auth.controller.spec.ts:36:44)
[1]       at processImmediate (node:internal/timers:464:21)

I'd be happy to create a pull request to fix the problem, I'm just lost actually to find where the issue comes from. Thank you!

[LoicPoullain]

Hi @vlourme

What is your test code? Do you call await createConnection() somewhere in your test ? For example with a before(async () => { await createConnection() });?

[vlourme]

Thank you for your fast answer! It effectively works.

I was able to make it common by adding this into the global test.ts file:

let connection: Connection;

before(async () => {
  console.log('Creating database connection');
  connection = await createConnection();
});

after(async () => {
  console.log('Closing database connection');
  await connection.close();
});