Issue with should.js using TypeScript

Question

My code is:

Object.keys(res.body.data).should.containEql('id')

The error that TypeScript gives me is

Property 'should' does not exist on type 'string[]'.

So how do I use should with TypeScript?

Let me know if my answer fixed your problem! – Marco Talento Jul 04 '18 at 12:22 — Marco Talento, Jul 04 '18 at 12:22

Marco Talento · Accepted Answer · 2018-07-03T15:43:51.800

5

You are missing the import of should library. Basically you need to import import 'should' to have access to should methods.

I have tested this code and it works! If I comment the import I had the same issue that you have.

import 'should';

describe('test', () => {

    it('should must work', () => {
        Object.keys({ a: 1, b: 2 }).should.containEql('b');
    })
})

edited Jul 03 '18 at 15:43

answered Jul 03 '18 at 15:41

Marco Talento

This doesn’t compile for me (TypeScript 2.9.2). – Aankhen Jul 03 '18 at 15:43
Have you installed the definitions? `npm install @types/should @types/mocha --save-dev` – Marco Talento Jul 03 '18 at 15:44
1

Ah, I didn’t realize this was running under Mocha. Now it works. Nice! – Aankhen Jul 03 '18 at 15:45

1 Answers1