Verify that an exception is thrown using Mocha / Chai and async/await

Question

I\'m struggling to work out the best way to verify that a promise is rejected in a Mocha test while using async/await.

Here\'s an example that works, but I dislike t

Answer 1

You can use async/await and should for simple verification

it('should not throw an error', async () => {
  try {
    let r = await wins();
    r.should.equal('Winner');
  } catch (error) {
    error.should.be.null(); //should.not.exist(error) can also be used
  }
});

it('throws an error', async () => {
  try {
    await fails();
  } catch (error) {
    error.should.be.Error();
    error.should.have.value("message", "Contrived Error");
  }
});