Currently in the process of converting some outdated AngularJS unit tests to TypeScript and encountered this issue:
Error: [$injector:unpr] Unknown provider: myComponentDirectiveProvider <- myComponentDirective
In most AngularJS unit testing examples I've come across, they showcase a main module where everything is included, and then inject that main module into the unit test using
angular.mock.module('theWholeStinkingApp')
. While this approach works well for smaller tutorials, I'm dealing with a massive application containing numerous components, services, filters, and directives. Injecting the entire app into a unit test isn't practical or efficient. It's also not ideal to start up the entire app just for a component unit test, as it defeats the purpose of isolated unit testing.
For testing services, I typically create a module within the test using beforeEach
, mocking dependencies while injecting the actual service I want to test:
angular.mock.module(($provide) => {
$provide.service('firstDependency', FirstDependencyMock);
$provide.service('secondDependency', SecondDependencyMock);
$provide.service('serviceIWantToTest', ServiceIWantToTest);
});
The challenge lies in creating a mock module and injecting a Component. Any assistance on this matter would be greatly appreciated.
It's important to note that I don't want to rely on
to resolve this issue. I simply aim to create a mock module and attach my component to it.angular.mock.module('theWholeApp')
Below is a simplified version of my approach:
The Component code snippet:
angular.module('theWholeApp', [])
.component('myComponent', {
controller: MyComponentController,
templateUrl: 'path/to/my/template.html'
)
... // 100+ other components;
The corresponding test script:
describe('MyComponent', () => {
beforeEach(() => {
angular.mock.module(($provide) => {
$provide.service('firstDependency', FirstDependencyMock);
$provide.service('secondDependency', SecondDependencyMock);
});
angular.mock.inject(($injector) => {
$rootScope = $injector.get('$rootScope');
$componentController = $injector.get('$componentController');
firstDependency= $injector.get('firstDependency');
secondDependency= $injector.get('secondDependency');
$scope = $rootScope.$new();
});
});
describe('doSomething', () => {
it('exists', () => {
controller = $componentController('myComponent', {$scope});
expect(controller.doSomething).toBeDefined();
});
});
});
Note that this is a simplified representation and not direct code. The objective is to create a mock module and incorporate the component so that
$componentController('myComponent', {$scope})
functions correctly.
Thank you!