Tips for effectively testing an Angular directive

I'm having trouble testing an Angular directive due to encountering the following unexpected error:

Error: Unexpected request: GET /api/players/info

It seems that the issue may stem from references to my controller within the directive definition object, but I'm not sure how to resolve it. Below is the code for my directive and the corresponding test:

The directive (playerInfo.directive.js):

'use strict';

angular.module('gameApp')
  .directive('playerInfo', playerInfo);

function playerInfo() {
  var directive = {
    link: link,
    restrict: 'E',
    templateUrl: '/app/player/playerInfo.directive.html',
    controller: 'PlayerInfoController',
    controllerAs: 'playerInfo'
  };
  return directive;

  function link(scope, element) {
    var address =   angular.element(element[0].getElementsByClassName('blur'));
    address.on('click', function() {
      address.css({'-webkit-filter': 'none'});
    });
  }
}

The test (playerInfoSpec.js):

'use strict';

describe('playerInfo directive', function() {
  var element;
  var scope;

  beforeEach(module('gameApp'));

  beforeEach(inject(function($templateCache) {
    var templateUrl = '/app/player/playerInfo.directive.html';
    var asynchronous = false;
    var req = new XMLHttpRequest();
    req.onload = function() {
      $templateCache.put(templateUrl, this.responseText);
    };
    req.open('get', '/base' + templateUrl, asynchronous);
    req.send();
  }));

  beforeEach(inject(function($rootScope, $compile) {
    scope = $rootScope.$new();
    element = '<player-info></player-info>';
    element = $compile(element)(scope);
  }));

  it('should replace the element with the appropriate content', function() {
    scope.$digest();
    expect(element.html()).toContain("Score:");
  });
});

In my controller, a service is used to make a GET request to /api/players/info. The error related to the reference in the directive definition object might be linked to this.

Answer №1

When your controller makes a call to /api/players/info, you'll need to mock that remote call for unit testing purposes (assuming you're using Karma and Jasmine). This can be done using the ngMock module and the $httpBackend service.

'use strict';

describe('playerInfo directive', function() {
  var element;
  var scope;
  var $httpBackend

  beforeEach(module('gameApp'));

  beforeEach(inject(function($templateCache) {
    var templateUrl = '/app/player/playerInfo.directive.html';
    var asynchronous = false;
    var req = new XMLHttpRequest();
    req.onload = function() {
      $templateCache.put(templateUrl, this.responseText);
    };
    req.open('get', '/base' + templateUrl, asynchronous);
    req.send();
  }));

  beforeEach(inject(function($rootScope, $compile, _$httpBackend_) {
    scope = $rootScope.$new();
    element = '<player-info></player-info>';
    element = $compile(element)(scope);
    $httpBackend = _$httpBackend_;
    $httpBackend.whenGET('/api/players/info').respond(200, '');
  }));

  it('should replace the element with the appropriate content', function() {
    scope.$digest();
    expect(element.html()).toContain("Score:");
    $httpBackend.flush()
  });
});

For more information, check out the full documentation
And learn about underscores here

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

Can you explain the concept of "Import trace for requested module" and provide instructions on how to resolve any issues that

Hello everyone, I am new to this site so please forgive me if my question is not perfect. My app was working fine without any issues until today when I tried to run npm run dev. I didn't make any changes, just ran the command and received a strange er ...

Is it necessary to validate input for a login form? Some may argue that it creates unnecessary overhead and introduces concerns about an excess of javascript

While working on input validation for my registration form, the idea of implementing it on my login form also crossed my mind. My login form only requires an email and password. I'm considering validating whether the email entered is a valid email add ...

Obtaining the NativeElement of a component in Angular 7 Jasmine unit tests

Within the HTML of my main component, there is a my-grid component present. Main.component.html: <my-grid id="myDataGrid" [config]="gridOptions" </my-grid> In main.component.specs.ts, how can I access the NativeElement of my-grid? Cu ...

function executed when meteor template finishes loading all content

Here is a template structure that I am working with: <template name="mainEvents"> <section class="main-events-list events-list js-content-slider"> {{#each events}} <div class="events-list-item"> &l ...

Efficiently Loading AJAX URLs using jQuery in Firefox

setInterval(function(){ if(current_url == ''){ window.location.hash = '#!/home'; current_url = window.location.hash.href; } else if(current_url !== window.location){ change_page(window.location.hash.split('#!/&apo ...

Retrieve the dimensions of an image once rendering is complete, using Angular

I'm currently working on obtaining the rendered size of an image within a component. By utilizing the (load) event, I can capture the size of the image as it appears at that particular moment (pic1), as well as its "final" size after the page has fini ...

What is the optimal approach for displaying numerous button components with varying values?

I've been developing a calculator in React and I decided to render all the buttons using the Button Panel component with what some might call a "brute force" method. return ( <> <div> <Button value="A/C" cl ...

Dynamically attach rows to a table in Angular by triggering a TypeScript method with a button click

I need help creating a button that will add rows to a table dynamically when pressed. However, I am encountering an error when trying to call the function in TypeScript (save_row()). How can I successfully call the function in TypeScript and dynamically a ...

Display the Material UI Switch in an active state even when the "checked" value is set to false

While using Material UI Switches with Formik, I've encountered an issue. When I toggle the switch to 'enable,' it automatically sets the value in Formik to "true," and when I toggle it to 'disable,' it sets the value in Formik to " ...

Can I monitor when a $http request is being processed?

One of the functions in my service is as follows: self.$http({ url: xxx, method: "DELETE" }) .success((): void => { }); I am looking for a way to dynamically disable a button on my html page while the $http call is being made. Is there a sol ...

JavaScript sorting through nested functions

Having an issue with running a function inside another function for my Bingo game script. The checkBingo() function is defined outside of a .click() function, but I'm facing problems. Ajax is involved, so that might be contributing to the issue. Here& ...

Is there a way to confine a jquery script within the dimensions of the container div?

I have recently created a gallery with navigation buttons in jQuery. As a newcomer to jQuery, I wrote a small script that adjusts the margin of a div container by a fixed amount. The script is functioning properly, but it extends beyond the top and bottom ...

Having trouble locating an element on a webpage? When inspecting the element, are you noticing that the HTML code differs from the source page?

I'm having trouble locating a specific element on a webpage. When I use the Inspect Element tool, I can see the HTML code with the element id = username, but when I check the page source, all I see is JavaScript code. Does anyone have any suggestions ...

Prevent the bottom row from being sorted

I have implemented sortable table rows in my angular project, however the sorting functionality also affects some query-ui code elements. Now I am looking to exclude the last row from being sortable. HTML <div ng:controller="controller"> <ta ...

How can I display the output from Geocoder in a text box using the ArcGIS JavaScript API?

I am trying to customize the Geocoder text box in the ArcGIS JavaScript API by overriding the default search result. Although I have written some code for this purpose, I am not satisfied with the results. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 ...

Waiting for the code to execute once the filtering process is completed in Next.js using Javascript

I'm seeking a way to ensure that my code waits for the completion of my filter function before proceeding. The issue arises because my filter function, which incorporates another function called useLocalCompare, causes a delay in execution. This delay ...

What are some solutions for resolving an infinite loop of axios requests?

I am currently in the process of developing a web app for Spotify using its API. I have encountered an issue where the handleClick function in Albums.js is being called repeatedly when trying to make a get request for specific artist album data. Could this ...

Guide the user to a specific website and replicate the user's action of pressing the down arrow or clicking a button three consecutive times

Currently, I am facing an issue with a WordPress slider that lacks anchors for linking to specific sections. I am wondering if there is a way to direct a user to a URL and simulate the action of pressing the down arrow or clicking a button multiple times ...

"Implementing conditional rendering to hide the Footer component on specific pages in a React application

Is there a way to conceal the footer component on specific pages? app.js <div className="App"> <Header setShowMenu={setShowMenu} /> {showMenu ? <Menu navigateTo={navigateTo} setShowMenu={setShowMenu} /> : null} <Main na ...

The component name 'Hidden' is not valid for use in JSX

Currently, I'm immersed in a personal project focused on creating a responsive website utilizing Material-UI. In this endeavor, I've leveraged React and kickstarted the project with create-react-app. To enhance the design, I incorporated code fro ...