A beginner's guide to using Jasmine to test $http requests in AngularJS

I'm struggling with testing the data received from an $http request in my controller as I don't have much experience with Angular.

Whenever I try to access $scope, it always comes back as undefined. Additionally, fetching the data from the test also seems to fail. What am I doing wrong?

Here is the code for the controller:

'use strict';

var myApp = angular.module('myApp.view1', ['ngRoute']);

myApp.config(['$routeProvider', function($routeProvider) {
  $routeProvider.when('/view1', {
    templateUrl: 'view1/view1.html',
    controller: 'View1Ctrl'
  });
}]);


myApp.controller('View1Ctrl', [

  '$scope',
  '$http',

  function($scope, $http) {
    $http.get('view1/data.json')
    .then(function(res){
      $scope.data = res.data.data
    });
}]);

And here's a snippet of the test:

'use strict';

describe('myApp.view1 module', function() {

  beforeEach(module('myApp.view1'));


  describe('view1 controller', function(){

    var scope, testCont;

      beforeEach(inject(function($rootScope, $controller) {
          scope = $rootScope.$new();
          testCont = $controller('View1Ctrl', {$scope: scope});
      }));

    it('should....', function(){
      expect($scope.data).toBeDefined();
    });

  });
});

Answer №1

To ensure that the HTTP requests are triggered, make sure to invoke $httpBackend.flush().

For additional details and resources, visit: http://docs.angularjs.org/api/ngMock.$httpBackend

Unit Test Example:

'use strict';

describe('myApp.view1 module', function() {
var $httpBackend, $rootScope, createController, jsonHandler;
beforeEach(module('myApp.view1'));


describe('view1 controller', function(){

var scope, testCont;

  beforeEach(inject(function($rootScope, $controller, $injector) {
   // Setting up mock http service responses
   $httpBackend = $injector.get('$httpBackend');
   // defining backend for all tests
   jsonHandler= $httpBackend.when('GET', '/view1/data.json')
                            .respond({data: '[XXX,XXX,XXX]'});
    // Obtaining a scope (root scope)
    $rootScope = $injector.get('$rootScope');
    // Using $controller service to instantiate controllers
    var $controller = $injector.get('$controller');

    createController = function() {
        return $controller('View1Ctrl', {'$scope' : $rootScope });
    };

  }));

it('should....', function(){

   $httpBackend.expectGET('/view1/data.json');
   var controller = createController();
    $httpBackend.flush();
});

});
});

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Updating the HTML class with JavaScript

My HTML class has two classes $(document).ready(function() { $(".container").hover(function() { $('.green').addClass('display-on'); }); $(".container").mouseleave(function() { $('.black&apos ...

AngularJS: Controller causing an unchecked error

I'm a beginner to AngularJS and I'm struggling to understand why I'm not getting a response when clicking the button. Any help would be greatly appreciated. I've reviewed other examples of controllers being used but I can't seem to ...

Is there a way for me to modify this carousel so that it only stops when a user hovers over one of the boxes?

I am currently working to modify some existing code to fit my website concept. One aspect I am struggling with is how to make the 'pause' function activate only when a user hovers over one of the li items, preventing the carousel from looping end ...

Is there a way to trigger a "click" on a webpage without physically clicking? So that I can preview the response message before actually clicking

Is it possible to generate a "mock" request to a server through a website in order to examine the response before sending the actual request? Let me clarify with an example: if I were to click on a button on a website, it displays a certain message. I am ...

What is the best way to show inline icons within menu items?

Issue Upon selecting an option from the menu, I encounter a problem where the icon (represented by a question mark inside a speech bubble) appears on a different line than the text ("Question"). Fig. 1. Display of menu after selection with the icon and t ...

Having trouble with AJAX calling an ASP.NET web method

When attempting to call an asp.net web method in my ajax request, the defined web method is structured like this: [WebMethod()] public static int DropDownIndexChanged(string selectedText) { int a = 5; // This is just for testing purposes return a; } ...

How can I duplicate or extract all the formatting applied to a specific text selection in Ckeditor?

I am currently utilizing CKEditor version 3.6 within my Asp.net MVC 3 Application. One of my tasks involves creating a Paint format option similar to Google Docs. I am looking to integrate this feature into CKEditor. Is there a way in CKEditor to transfe ...

Guide on how to validate react-multiselect with the use of Yup validation schema

If the multiselect field is empty, the validation message 'Product is required' is not being displayed. How can I validate this field? Here is the validation schema: validationSchema={ Yup.object().shape({ productID: Yup.string().requi ...

Can someone please advise me on how to output the value of a var_dump for an array using console.log?

After writing the code in this manner, it functions properly and returns a JSON object. public function getElementsAction() { $currency = App::$app->getProperty('currency'); if(!empty($_POST)) { $sql = 'SELECT name, p ...

Ways to receive alerts when a marker enters a polygon

Looking for a way to receive notifications if my marker enters any of the polygons on the map. Having trouble implementing it correctly, here is my current code: <!DOCTYPE html> <html> <head> <script src="http://ajax.googleapis.com ...

Analyzing Varied Date Formats

I'm looking to create a function in AngularJS that checks if a given date is after today: $scope.isAfterToday= function(inputDate){ if(inputDate > Date.now().toString()){ return true; } else { return false; } } The iss ...

Tips for resolving the issue of receiving a warning about passing "onClick" to a "<Link>" component with an `href` of `#` while having "legacyBehavior" enabled in Next.js

My current project is displaying a lot of warnings in the browser console and I'm unsure about the reasons behind it. The warnings include: "onClick" was passed to with href of /discovery/edit but "legacyBehavior" was set. The l ...

Integrate third-party code into your Angular application

I've been working on an Angular project and I wanted to spice things up by adding a confetti animation. I found this cool animation that I'd like to incorporate into my project: http://jsfiddle.net/vxP5q/61/?utm_source=website&utm_medium=emb ...

How can I clear all jQuery toggled classes that have been added across the entire webpage in an Angular project?

Upon clicking a link within an element, the following CSS is applied: <a class="vehicleinfo avai-vehicle-info-anc-tag" ng-click="vehicleInfo($event)">Vehicle Info <span class="s-icon red-down-arrow"> </span> </a> $scope.vehic ...

The issue I am facing is that the MDCSelect:change event does not seem to be functioning properly

Is there a way to get MDCSelect:change to work properly before appending all options? If I put MDCSelect:change after the list append, it works but the UI doesn't look right. Question: How can I make MDCSelect:change work without affecting the UI ap ...

Setting up a specific print media query for the body element through JavaScript

I'm facing an issue with my web page that has a bootstrap modal which pops up when a button is clicked. I've added a print media query to print the content of the modal, but it's causing a problem. When I include the media query in the CSS, ...

Tips for personalizing the Today button on Kendo Scheduler

Currently, my focus is on enhancing the functionality of the kendo.ui.Scheduler. One aspect I am particularly interested in customizing is the Today button. Rather than having it navigate to the current date of the local system upon clicking, I want it t ...

The issue of a malfunctioning react TypeScript map when used in conjunction with useContext

I am attempting to retrieve data from the TVMaze API using React, TypeScript, and useContext. Although I can display the data, the useContext does not update with the return value, so when I use the map function, nothing is displayed. Any advice on how to ...

Why does the getter consistently generate the previous value?

Check out this code snippet: function User(fullName) { this.fullName = fullName; Object.defineProperties(this, { firstName: { get: function () { return fullName.split(" ")[0]; ...

Ways to boost an array index in JavaScript

I recently developed a JavaScript function that involves defining an array and then appending the values of that array to an HTML table. However, I am facing an issue with increasing the array index dynamically. <script src="https://cdnjs.cloudflare. ...