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

An unexpected error occurred while attempting to retrieve data from Firebase and display it in another component

An error occurred: Unhandled Runtime Error Error: Element type is invalid - expected a string (for built-in components) or a class/function (for composite components) but got undefined. This could be due to forgetting to export your component from the defi ...

Is it possible to combine EJS compilation and html-loader in the html-webpack-plugin?

I need the html-webpack-plugin to generate my html using my .ejs template that contains <img> tags. The html-loader can update the image URLs in my <img> tags created by Webpack, so I am including it in my configuration: test: /& ...

A tutorial on how to switch classes between two tabs with a click event in Vue.js

I am having an issue with my spans. I want to implement a feature where clicking on one tab changes its color to red while the other remains gray. I have tried using class binding in my logic but it's not working. How can I solve this problem and make ...

Displaying data on the user interface in Angular by populating it with information from the form inputs

I am working on a project where I need to display data on the screen based on user input received via radio buttons, and apply specific conditions. Additionally, I require assistance in retrieving the id of an object when the name attribute is chosen from ...

"Transferring an array of data to a Laravel controller via AJAX: A step-by-step guide

Is there a way to send arrays of data to the back-end all at once? The Problem 1. This is what I'm currently sending: array:5 [ "_token" => "S5s5ZTTnnP93MyXgCql0l9vhHsiqt5VWaFyEedXj" "product_id" => "21" "specification_id" => "6" " ...

Maintaining TextBox State in ASP.Net Through Postbacks

Can anyone help me figure out how to maintain the control state that has been modified in Javascript? I am working with two TextBoxes, one DropDownList, and a button (all Runat=Server) in C# ASP.net 2010 Express. The first textbox accepts any user in ...

Providing UI field attributes within server JSON data

Suppose I have numerous form fields that need to be displayed on the user interface. Additionally, in a standard Modify workflow, let's assume that these fields will have various attributes like value, mandatory, editable, disabled, label, regex (for ...

Encountering a problem while trying to install ionic-native using npm

I encountered an error while working with npm and Angular: $ npm install ionic-native --save <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="c7a5a8a6b5a3abaea9a287f6e9f7e9f7">[email protected]</a> /home/louisro/Doc ...

AngularJS: Utilizing Multiple HTTP Requests with the $http Service

Here is the code snippet I am working with: var updateScreen = function() { $http.get("http://localhost:5000").then(function(response){ $scope.numSerie = response.data.refDetail.Num_Serie; $http.get("data/tempsgammes ...

Next.js is like Gatsby but with the power of GraphQL

I'm curious if it's possible to set up GraphQL in Next.js similar to how it's done in Gatsby, allowing me to query pages and retrieve data from them. Are there any plugins available for Next.js that work like Gatsby-file-source and gatsby-ma ...

What approach do you recommend for creating unique CSS or SCSS styles for the same component?

Consider a scenario where you have a complicated component like a dropdown menu and you want to apply custom styles to it when using it in different contexts. This customization includes not only changing colors but also adjusting spacing and adding icons. ...

implementing datepicker on multiple textboxes in jQuery upon button click

I have the ability to show multiple text boxes using jQuery. I am now looking to add a datepicker to those text boxes. Any assistance in finding a solution would be greatly appreciated. Thank you in advance. ...

What is the optimal value for the variable x in this scenario?

What is the correct value for X to make this condition valid? // Your code goes here if (x == 1 && x === 2) { console.log('Success!'); } ...

Having trouble fetching the value with the designated ID

I'm encountering an issue with retrieving a value using an id. In my code, I have it set up like this: view <input type="text" value="<?php echo $add->class;?>" name="cls_<?php echo $add->id;?>" id="cls_<?php echo $add->id ...

Can anyone help me find the Ajax URL for October CMS?

I'm interested in implementing Angular JS with October CMS. Can someone guide me on how to send data to the controllers via a POST request? Upon digging through the October framework.js file, I came across this code snippet: headers: { 'X-O ...

Has xlink:href become outdated for svg <image> elements?

In the realm of SVG attributes, it is noted by MDN xlink:href that href should be used over xlink:href. Interestingly, on the svg example page, last revised on July 6, 2017, the attribute utilized in the given example is xlink:href. The question arises: ...

Organize Dates in React Table

I need help with sorting the Date column in my code. Currently, the sorting is being done alphabetically. Here is the JSON data and code snippet: JSON [ { "date": "Jun-2022" }, { "date": "Jul-2022" } ...

Utilizing Ajax to update the login form without reloading the page and displaying any errors

I have created a login form that utilizes ajax to handle login errors such as "incorrect password" from my login.php file. Instead of reloading a new page with the error message, it now displays the errors on the same login form, which is working perfectly ...

Assign the output of a function to a variable

I am trying to retrieve data from a function call in nodejs and assign it to a variable. The desired output should be "Calling From Glasgow to Euston", but I'm currently getting "Calling From undefined to undefined". Here is the code snippet: functi ...

Retrieving information from a virtual document in a 'pre' save hook using Mongoose

Seeking help with utilizing data from a recently created document to update a value using a 'pre' hook. An example of the model being used: ... title: { type: String, required: true }, company: { type: mongoose.Schema.ObjectId, ref: &ap ...