chai

I having trouble figuring out why this test is not passing. var expect = require('chai').expect; describe('HelloComponent', function() { it('passes a quite simple test', function() { expect(1 + 4).to.equal(5); }); }); produces this error: DEBUG [web-server]: serving: /Users/ivan/dev/react-starter/node_modules/karma/static/context.html DEBUG [web-server]: serving (cached): /Users/ivan/dev/react-starter/node_modules/mocha/mocha.js DEBUG [web-server]: serving (cached): /Users/ivan/dev/react-starter/node_modules/karma-mocha/lib/adapter.js DEBUG [web-server]: serving (cached): /Users/ivan/dev/react

I'm using Mocha for unit testing and Chai for assertions. I'd like to find an easy to use solution to check if an object has the structure and properties as defined in my comparison object. But I don't need the objects to be completely equal. The subject under test should contain at least all the properties in my test object, but it might also contain other properties which are not under test at that moment. So, I want to test a unit to check if the object it returns has at least a property named 'foo', which itself is an object that at least contains the property 'bar' with value 10. So, I

Background: I'm currently reading " Web Development with Node and Express " by Ethan Brown (great book by the way for those learning node and express) and I got stuck on Chapter 5 - Quality Insurance. Everything was running smooth. First I ran the following: npm install --save-dev mocha npm install -g mocha npm install --save-dev chai npm install --save-dev zombie Problem: Then I ran (as the book instructed): mocha -u tdd -R spec qa/tests-crosspage.js 2>/dev/null But this wasn't doing anything. So then I ran: mocha -u tdd -R spec qa/tests-crosspage.js And then this error appeared: /Users

I'm pretty new to Javascript, and I have a quick question regarding the Chai library for making unit tests. When I was studying some materials on the Chai library, I saw a statement saying equal "Asserts that the target is strictly equal (===) to value" and eql "Asserts that the target is deeply equal to value.". But I'm confused about what the difference is between strictly and deeply. Strictly equal (or === ) means that your are comparing exactly the same object to itself: var myObj = { testProperty: 'testValue' }; var anotherReference = myObj; expect(myObj).to.equal(anotherReference); //

I'm testing out a simple application (from the Mocha tutorial code here https://marcofranssen.nl/using-mocha-chai-sinon-to-test-node-js/ ) to try to get Istanbul to work. My problem is that Istanbul works fine to give me a coverage summary, but then spits out an error for some reason and I'm not sure why. My tests all pass so they're hopefully not the problem. Here is how I run Istanbul: $ istanbul cover test.js ============================================================================= Writing coverage object [C:\Users\path\test\coverage\coverage.json] Writing coverage reports at [C:\Users

This question already has an answer here: chai test array equality doesn't work as expected 3 answers it('GET /customers/ with wrong id', (done) => { request .get(`/customers/${wrongId}`) .end((err, res) => { expect(res.body).to.equals({}); expect(res).to.have.status(404); done(); }); }); 1) Customers CRUD GET /customers/ with wrong id: Uncaught AssertionError: expected {} to equal {} + expected - actual You want to use deep if you're trying to compare objects: expect(res.body).to.deep.equal({}); Or use the eql method: expect(res.body).to.eql({}); 来源： https://stackoverflow.com/questions

This question already has an answer here: How does the chai expect function work? 2 answers expect(true).to.be.true; In this code, all the 'to', 'be', 'true' seems to be an attribute of the object response from 'expect(true)'. How can these attributes work so that they can raise an exception? You can check the source code: [ 'to', 'be', 'been' , 'is', 'and', 'has', 'have' , 'with', 'that', 'which', 'at' , 'of', 'same', 'but', 'does' ].forEach(function (chain) { Assertion.addProperty(chain); }); and there is a addProperty in utils : https://github.com/chaijs/chai/blob/master/lib/chai/utils