Mocha with db-migrate fails to complete tests

Question

I'm having some difficulty figuring out how to properly test this bit of code:

const chai = require('chai')
const chaiHttp = require('chai-http')
const restify = require('restify')
const errs = require('restify-errors')

const expect = chai.expect
chai.use(chaiHttp)

const willerror = true

const server = restify.createServer()
server.get('/', function (req, res, next) {
  if (!willerror) res.send()
  next(willerror ? new errs.InternalServerError() : null)
})

describe('Server test', function () {
  before(async function () {
    const c = {config: {dev: {driver: 'sqlite3', filename: ':memory:'}}}
    const dbm = require('db-migrate').getInstance(true, c)
    dbm.silence(true)
    await dbm.reset().then(() => dbm.up('all', 'all'))
  })
  after(function (done) {
    server.close(done)
  })
  it('posts', function (done) {
    const client = chai.request(server)
    client.get('/')
      .end((err, res) => {
        expect(err).to.be.null
        expect(res).to.have.status(200)
        done()
      })
  })
})

(Note: it requires at least one migration, but it can be empty: db-migrate create one should suffice).

The output I get:

Removing the contents of the before() call (leaving just before(async function(){})) gives what what I'd expect:

Why aren't these tests finishing?

Answer 1

Turns out db-migrate registers an uncaughtException handler.

To defeat it, add throwUncatched: true to the configuration object passed to db-migrate. In my case:

const c = {throwUncatched: true, config: {dev: {driver: 'sqlite3', filename: ':memory:'}}}