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JavaScript JavaScript Unit Testing Behavior Driven Development with Mocha & Chai A Testing Test!

Anusha Singh
PLUS
Anusha Singh
Courses Plus Student 22,106 Points
Posted by Anusha Singh
Anusha Singh
Courses Plus Student 22,106 Points

I didn't understand the question. Can anyone give my answer?

The question is { Write a test spec that proves the clone function in clone.js returns an object where all properties match. HINT: it might help to check the Chai docs. } Please help.

clone_spec.js 
var expect = require('chai').expect

describe('clone', function () {
    var clone = require('./clone.js')
    it('some description string', function () {

        // YOUR CODE HERE

    })
})
clone.js 
function clone (objectForCloning) {
    return Object.assign({}, objectForCloning)
}

module.exports = clone
Anusha Singh
Anusha Singh
Courses Plus Student 22,106 Points
Anusha Singh
Anusha Singh
Courses Plus Student 22,106 Points

I have already posted this question once, I have posted it again as no one replied

Jill Marszalek
Jill Marszalek
11,325 Points

Soma -

I tried a bunch of different things then searched the internet and found this:

expect(clone({ foo: 1, bar: 2 })).to.have.any.keys('foo', 'baz');

It doesn't look like anything from the video, but I copied and pasted it in and it got me through. Hope it works for you too!

1 Answer

Miguel Canas
seal-mask
.a{fill-rule:evenodd;}techdegree
Miguel Canas
Python Development Techdegree Student 11,470 Points
Miguel Canas
.a{fill-rule:evenodd;}techdegree
Miguel Canas
Python Development Techdegree Student 11,470 Points

Hi Soma,

The exercise is asking you to prove that the clone() method in clone.js works correctly by writing a test case, using ChaiJS.

It has done a lot of the work for you, just use the expect api from ChaiJS to write assertions where it says // YOUR CODE HERE.

What you want to assert is that if you have clone({ a: 1}) that the return value you get back should be an exact copy of that object.

Take a look at Chai's expect documentation for help on writing your assertions.

Good luck!

~ Miguel