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'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...
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 trying to run a test that is meant to check if my React component's Add button gets clicked, so that a spy can catch that the appropriate method is being called and pass the test.  However I am encountering an error with ReactTestUtils.Simul...
I am trying to stub a library function with Sinon. Sorry can't post exact code but it looks something like the code below.  The library I am trying to stub library.js   async function a(input) {     // make some api calls here     returns input;...
I'm trying to attain the coverage of my function as below.  function behaveDiff(obj, 'name',function(){       obj.xyz.call(obj,'name'); })    The test case for this I have written which is working fine, but in my code coverage its...
here's the situation that i'm dealing with:  in helpers.js  import {funcA, funcB, funcC} from './utils';  function foo(){   .... } module.exports = {foo: foo}   in barActions.js:  import {foo} from '../js/helpers';  function b...
I have condition where i need to mock or stub data.      var array =['add','divide']     var add =listMehtod[0];     if(add instanceof Calculator){  // how to test this ?        // some logic      }   basically i have to write some te...
Here is my code I'm testing:  const CardWarsComponent = props => {     const onSubmitCardMove = () => {         props.floopThePig()     }     return <Button id="FloopButtonId" onClick={onSubmitCardMove}>FLOOP IT</Button>...
please, help me. How check catch in unit test with error instanceof StatusCodeError?  await this.httpClientGet(request)             .catch(error => {                 if (error instanceof StatusCodeError && error.statusCode == 401) {...

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