Can anyone help me with testing of following function function onload(cb){ const image = 'http://placehold.it/350x150' const img = new Image() img.src = image img.onload = () => { cb() } ...

I am trying to do unit testing for a simple function which sends a get request, receives a response and then returns a promise object with the success or the failure message. Following is the funct...

I need to test this function : //user.js function getUser(req, res, next){ helper.get_user(param1, param2, (err, file) => { if (err) return next(err); } This is my test function : it (&qu...

There seems to be so many different ways to do this, but I am trying to use just sinon, sinon-test, chai/mocha, axios, httpmock modules. I am not able to successfully mock a GET call made using axi...

I am trying to write unit tests but am having trouble stubbing the AWS S3 getobject method. Here is my code: describe('testExecuteSuccess()', function () { it('Test execution with id is successfu...

I am trying to test the parameters of an axios call using sinon / chai / mocha, to confirm the existence of certain parameters (and ideally that they are valid dates with moment). Example code (in...

Function I'm spying on, receives object as an argument. I need to assert that the function been called with certain properties of the object. e.g: my SUT has: function kaboom() { fn({ foo: ...

I'm trying to test a function that calls the module cors. I want to test that cors would be called. For that, I'd have to stub/mock it. Here is the function cors.js const cors = require("cors")...

Sinon doesn't seem to be stubbing a method from an imported file. Is it to do with exporting consts? I see "Received ORIGINAL MESSAGE" in the console.log. Main.js import * as otherActions from '...

I have been learning Sinon JS for unit testing, and I am trying to get this example code working. I have a simple "external" library created: class MyLib { simpleMethod () { return 'some respo...

I have a middleware function which checks a session token to see if the user is an admin user. The function does not return anything if all checks pass but simply calls next(). How can I wait for...

I'm having problems writing tests in JavaScript with Sinon and Chai. I'm trying to check if a function is called on a spy and get I get "Error: Invalid Chai property: calledOnce" I'm do...

I am trying to use Sinon to test a JS component which looks a bit like this... import Bootbox from "../helpers/bootbox"; import Guard from "../helpers/guard"; import UrlHelper from "../helpers/url...

I am trying to test localStorage using sinon. Basically I am very new to unit testing so this might be very basic. Update I managed to come up with this but now its giving me a new error Should w...

I want to use a sinon stub to asynchronously test an event emitter. I want the stub to call a callback after it is called. I thought stub.yields was what I want but not. Is there a neat way to do ...