const emailModel = new Email();
await emailModel.sendSignupMail(user, 'en');

let email = new Email();
beforeEach(() => {
    chai.spy.on(Template.prototype, 'load');
    chai.spy.on(mail, 'sendEmail', () => {});
    stubSendMail = sinon.stub(email, 'sendSignupMail').resolves();
})

afterEach(() => {
    chai.spy.restore();
    if (stubSendMail) stubSendMail.restore();
})

it('should return a 200 if success', async () => {
  await userLoginController.signup(req, res, next);
  expect(res.statusCode).to.equal(200);
});

POST /v2/user/signup
  should return a 200 if success:

  AssertionError: expected 500 to equal 200
  + expected - actual

  -500
  +200