Human-readable messages should be provided when arrays / objects deep equal assertions fail

[fakiolinho]

I am using jest 19.0.2 and chai 3.5.0 and i am trying to run some assertions for my Redux reducers. I am trying to compare 2 objects by using:

import { expect } from 'chai';
...
expect(...).to.eql(...);

This is the result i am getting:

As you see this is not that declarative and helpful since i cannot spot the exact keys where this assertion fails. Same result i am getting if i use assert.deepEqual(...); and expect(...).to.deep.equal(...);

If i use expect 1.20.2 with exact same setup and run sth like expect(...).toEqual(...); this is the error i am getting:

[meeber]

Hi @fakiolinho. In general, there's a lot of room for improvement in the Chai failed assertion messages. It's on the roadmap (#457) to do a refactor.

With that said, the particular problem you noted might be resolvable by fiddling with the chai.config.truncateThreshold value documented here. Setting it to 0 will disable truncation completely.

[fakiolinho]

Thanks @meeber for getting back to me. Didn't know about that. I 'll definitely start using it!!