Examining Angular Modules using Jasmine Unit Tests

Currently, I am integrating an AngularJS service into my application. Upon testing, I discovered that the service is not as reliable as I had hoped. To address this issue, I decided to implement some unit tests for it. While the service functions properly within my AngularJS app, I encountered difficulties when trying to make it work with Jasmine. It seems like I am unable to load any modules. I have simplified the code to its essentials, yet I cannot pinpoint the error in my approach. Here is a snippet of the code:

myService.js

'use strict';
angular.module('customModule', [])
    .factory('$serviceName', [function () {    
        return {    
            isAvailable: function () {
                return true;
            }
        };
    }]
);

myService.spec.js

  describe('customModule', function() {
    beforeEach(function() {
        console.log('loading module...');
        module('customModule');
    });

    describe('$serviceName', function () {
        var myService = null;
        beforeEach(inject(function ($serviceName) {
            console.log('loading service...');
            myService = $serviceName;
        }));

        it('should work', function () {
            console.log('testing');
            var isAvailable = myService.isAvailable();
            console.log(isAvailable);
            expect(1 + 2).toEqual(3);
        });
    });
  })

gruntfile.js

'use strict';
module.exports = function (grunt) {
  grunt.initConfig({
    jasmine: {
      unitTests: {
        src: 'test/*.js',
      }
    }
  });

  require('load-grunt-tasks')(grunt);
  grunt.registerTask('default', ['jasmine:unitTests']);
};

Although my Jasmine tests are functioning correctly, it seems that myService.js is not being loaded. I am unsure how to resolve this issue and also how to include 'angular' (which is used in myService.js) within the tests. Any assistance would be greatly appreciated.

Thank you for your support.

Answer №1

Are you wondering how to properly load your Angular application in myService.spec.js? If not, $serviceName may not be available for dependency injection.

To solve this issue, make sure to include the following code snippet in your test file:

beforeEach(module('yourAppName'));

(remember to replace 'yourAppName' with the actual name of your application)

Furthermore, it's advisable to use an additional beforeEach block to handle dependency injection so that it can be utilized in all tests within myService.spec.js. Your setup should look something like this:

describe('serviceName', function () {

  beforeEach(module('yourAppName'));

  var instantiatedMyService;

  // Initializing the service
  beforeEach(inject(function ($serviceName) {
      instantiatedMyService = $serviceName;
  }));

  it('should verify availability', function () {
    var isAvailable = instantiatedMyService.isAvailable();
    console.log(isAvailable);
    expect(1 + 2).toEqual(3);
  });
});

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