Troubleshooting issues when testing Angular services using Jasmine and Chutzpah

Question

Troubleshooting issues when testing Angular services using Jasmine and Chutzpah

I've been facing some challenges while attempting to test my AngularJs services with Jasmine as I encounter various errors consistently. In an effort to troubleshoot, I decided to create a simple Sum service for testing purposes but unfortunately, the errors persist.

Below is the AngularJS service that I am trying to test:

   angular.module('base', [])
   .service('operacoes', [function () {
      this.somar = function (n1,n2) {
          return n1 + n2;
      };
   }]);

Here's the test script I have written:

/// <reference path="../../Scripts/angularjs/angular.min.js" />
/// <reference path="../../Scripts/angularjs/angular-mocks.js" />
/// <reference path="../../ServicoBase.js" />
describe("Testing Services", function () {
    var operacoesObj;

    beforeEach(angular.module('base'));

    beforeEach(inject(function (operacoes) {
        operacoesObj = operacoes;
    }));

    it('should be initialized', function () {
        expect(operacoesObj).toBeDefined();
    });

    it('should be able to add 2 numbers', function () {
        expect(operacoesObj.somar(5, 1)).to.equal(6);
    });
});

Upon running these tests, I encountered the following errors:

TypeError: Object doesn't support property or method 'call'
[$injector:unpr] http://errors.angularjs.org/1.4.4/$injector/unpr?p0=operacoesProvider%20%3C-%20operacoes
Expected undefined to be defined.

I have experimented with different versions of Jasmine like 2.4.1 and currently using version 2.5.2.

javascript angularjs unit-testing jasmine chutzpah

Answer 1

Answer №1

When it comes to testing, there's a distinction between testing services and testing controllers. Utilize $injector.get() for retrieving a service instance. I made some adjustments to your test code below, resulting in successful tests:

describe("Service Testing", function () {
    var svc;

    beforeEach(function() {
        angular.mock.module('base')

        inject(function($injector) {
            svc = $injector.get('operations');
        })
    });    

    it('should be initialized', function () {
        expect(svc).toBeDefined();
    });

    it('should successfully sum 2 numbers', function () {
        expect(svc.sum(5, 1)).toEqual(6);
    });
});

For insights on unit testing services in Angular, refer to the documentation here.

Moreover, conducting a test solely to check if a service is defined may not be essential. In case the service is undefined, subsequent unit tests will reveal this through failures.

Answer 2

When it comes to testing, there's a distinction between testing services and testing controllers. Utilize $injector.get() for retrieving a service instance. I made some adjustments to your test code below, resulting in successful tests:

describe("Service Testing", function () {
    var svc;

    beforeEach(function() {
        angular.mock.module('base')

        inject(function($injector) {
            svc = $injector.get('operations');
        })
    });    

    it('should be initialized', function () {
        expect(svc).toBeDefined();
    });

    it('should successfully sum 2 numbers', function () {
        expect(svc.sum(5, 1)).toEqual(6);
    });
});

For insights on unit testing services in Angular, refer to the documentation here.

Moreover, conducting a test solely to check if a service is defined may not be essential. In case the service is undefined, subsequent unit tests will reveal this through failures.

Answer 3

Answer №2

Check out this code snippet:

describe("Unit Testing Services", function() {
  beforeEach(module('app'));

  it('should be initialized', inject(function(calcService) {
    expect(calcService).toBeDefined();
  }));


  it('should be able to add two numbers', inject(function(calcService) {

    expect(calcService.add(5, 1)).toEqual(6);

  }))

});

Answer 4

Check out this code snippet:

describe("Unit Testing Services", function() {
  beforeEach(module('app'));

  it('should be initialized', inject(function(calcService) {
    expect(calcService).toBeDefined();
  }));


  it('should be able to add two numbers', inject(function(calcService) {

    expect(calcService.add(5, 1)).toEqual(6);

  }))

});

Troubleshooting issues when testing Angular services using Jasmine and Chutzpah

Answer №1

Answer №2

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