Injecting Custom Services in an AngularJS Unit Test
Problem
You need to inject a custom AngularJS service object to a (Jasmine) unit test spec for testing.
Solution
There are so many ways you can inject a custom service object to a unit test spec in AngularJS. The following sample code illustrates 2 ways to inject the same custom service object to a unit test case.
describe('myNameSpace.services', function() {
describe('MyService', function() {
var createService;
beforeEach(inject(function() {
var $injector = angular.injector(['myNameSpace.services'])
createService = function() {
return $injector.get('MyService');
}
}));
it('should be defined', function() {
var service = createService();
expect(service).toBeTruthy();
});
});
});describe('myNameSpace.services', function() {
describe('MyService', function() {
var createService;
beforeEach(module('myNameSpace.services'));
beforeEach(inject(function($injector) {
createService = function() {
return $injector.get('MyService');
}
}));
it('should be defined', function() {
var service = createService();
expect(service).toBeTruthy();
});
});
});Written by Samuel Chow
Related protips
3 Responses
please mention the imports which are required ...as i tried injecting a service in a unit test of a pipe object creation, although your code works but I am unable to figure out the imports you have used.
Here's my code -
describe('InstrumentPipe', () => {
describe('InstrumentService', function () {
var createService;
// shows compiler error on "inject(function"
beforeEach(inject(function () {
var $injector = angular.injector(['../services/InstrumentService'])
// shows compiler error on "angular.injector"
createService = function () {
return $injector.get('InstrumentService');
}
}));
it('create an instance', () => {
const pipe = new InstrumentPipe(createService);
expect(pipe).toBeTruthy();
});});
const module = angular.mock.module;
const inject = angular.mock.inject;
let searchService;
describe('Testing some awesome service', () => {
beforeAll(module('yourModule'));
beforeEach(inject($injector => {
searchService = $injector.get('SearchClass');
}));
it('Should be defined', () => {
expect(searchService).toBeDefined();
});
)}
