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: 'foo',          bar: 'bar&#...
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()   } }   In my test file Image is availabl...
Let say we have a function that returns a function and bounds arguments to it:  function A(x, y){     return function(x, y){...}.bind(this, x, y); }   And now we want to know if function A binds arguments correctly:  var resultedFunction = A(); var s...
I am using sinon.js to test my API.  I would like to test the order from my helper functions that are being called.  controller.js  exports.controllerFunction = async (req, res) => {       const function1Results = await function1(paramm);      con...
I'm trying to write a unit test for setInterval(), but i'm not sure how to spy on the fetchState().  maincode.js:  var pollStatus = function(interval, killPolling) {    // Clear Interval if function is called again     if (killPolling || Stat...
How can I test if a callback function from a event listener is called? For example, I have the following code where app.js initializes the application through the init.js controller.  The main.js file has a class which extends and Event Emitter, maki...
I've currently got an ES6 class with a constructor and two methods. I'm a tad confused as to why using Promise.reject(ex) within the .then() is resolving undefined. If someone wouldn't mind explaining what I'm doing wrong that would b...
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 'filters/actions/Other.actions';...
Recently we started writing test cases for our application , we need help in writing test cases for controllers. We are using Mocha, chai and Snion libraries for writing test cases.  Here is the plunker link which contains our controller code in it....
I am new to unit testing and am using Mocha, Sinon and Chai to test NodeJs code. The problem is that my expectation for stub.calledWith() always fails when it is an object, even though the test error shows two objects which are syntactically identica...

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