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

Posted by Presica Mathew
Presica Mathew
Courses Plus Student 2,752 Points

How to write an expectation that an object returned by a function have all properties match?

I tried by using the following,

var obj = {x: {a: 1}}; expect(clone(obj).to.deep.equal(obj);

//where clone() will return a cloned obj

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

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

        // YOUR CODE HERE
        var obj = {x: {a: 1}};
        expect(clone(obj)).to.have.property('a').but.not.own.property('a'); 
        //expect(clone(obj)).to.deep.equal(obj);
    });
});
clone.js 
function clone (objectForCloning) {
    return Object.assign({}, objectForCloning)
}

module.exports.clone = clone

1 Answer

Presica Mathew
Presica Mathew
Courses Plus Student 2,752 Points

The test spec for finding if the properties of an object are same can be verified with the below piece of code.

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