Chai test array of objects to “contain something like” an object submatch

Question

Ok. I\'ve tried to read other questions here but still didn\'t find a straightforward answer.

How can I assert a partial object match in an array using chai? Something

Answer 1

ES6+

Clean, functional and without dependencies, simply use a map to filter the key you want to check

something like:

const data = [ { name: 'test', value: 'bananas' } ];
expect(data.map(e=>e.name)).to.include("test");

and if you want to test multiple keys:

expect(data.map(e=>({name:e.name}))).to.include({name:"test"});

https://www.chaijs.com/api/bdd/

Answer 2

Not sure why you dismissed chai-subset as this seems to work:

expect(data).to.be.an("array").to.containSubset([{ name: "test" }]);

Answer 3

Since chai-like@0.2.14 the following approch will work:

var chai = require('chai'),
    expect = chai.expect;

chai.use(require('chai-like'));
chai.use(require('chai-things')); // Don't swap these two

expect(data).to.be.an('array').that.contains.something.like({name: 'test'});