toNotExist() issue

[manurueda]

Hi all,

First of all, congrats for the library. I am having issues with toNotExist(). ie: expect(null).toNotExist() outputs TypeError: expect(...).toNotExist is not a function

Thank you, J

[ljharb]

@jmderueda what version of expect are you using? v21+ is maintained by the jest team; see https://github.com/mjackson/expect#notice

[elgelbo]

Same for me. On v22.0.3. Same test worked with calling alias toBeFalsy

[ljharb]

@elgelbo expect v21+ is maintained by jest; that's not this repo.

[mk2683]

The expect assertion library has changed ownership. It was handed over to the Jest team, who in their infinite wisdom, created a new API.

You must now use 'toBeTruthy()' instead of 'toExist()'. You can still install expect as before, "npm install expect --save-dev", which is currently at version 21.2.1.Most methods names will remain unchanged except for a few, including 'toExist()'.

[ljharb]

@IoanZ1994 that is a very wrong conclusion; that “worked” because it’s a noop - it’s undefined.

Never use noop matchers, only ever use a matcher that terminates in a function call, for this reason.

[ioanzicu]

In expect.js library was made next changes

.toExist() // aka: toBeTruthy()

.toNotExist() // aka: toBeFalsy() From official expect.js page https://devhints.io/expectjs

[tonyfrenzy]

Given testedEntity == null

expect(testedEntity).toBeFalsy() or expect(testedEntity).toBe(null) works as well