How to run $ onInit or $ onChanges in unit testing an Angular component controller?

Question

I use Angular 1.5.5 and Jasmine as a test framework. Currently, I have to do something like this for the test to pass:

function createController(bindings) {
    return $componentController('myController', null, bindings);
}

beforeEach(inject(function (_$componentController_) {
    $componentController = _$componentController_;
}));

describe('on pages updated', function () {

    beforeEach(function () {
        controller = createController({prop1: 0, prop2: 0});
        controller.$onInit(); // you see I have to explitcitly call this $onInit function
    });

    it('should update isSelected and currentPage', function () {
        expect(controller.prop1).toBe(0);
        expect(controller.prop2).toBe(0);

        controller.prop1= 1;
        controller.prop2= 2;
        controller.$onChanges(controller); // and $onChanges here as well

        expect(controller.prop1).toBe(1);
        expect(controller.prop2).toBe(2);
    });

});

Answer 1

There is a problem on github regarding this: https://github.com/angular/angular.js/issues/14129

Basically, it works as intended, without calling $onInitor $onChangesautomatically.

( ) $onInit, : $componentController - $, , Provider, , (, ). , , $onInit , , , ( ).

Answer 2

, ,

beforeEach(module('templates'));

var element;        
var scope;

beforeEach(inject(function ($rootScope, $compile) {
    scope = $rootScope.$new();
    scope.draw = new ol.source.Vector({ wrapX: false });
    element = angular.element('<custom-element draw="draw"></custom-element>');
    element = $compile(element)(scope);
}));

var controller;
beforeEach(inject(function ($rootScope, $componentController) {
    scope = $rootScope.$new();
    scope.draw = new ol.source.Vector({ wrapX: false });
    controller = $componentController('customElement', {draw: new ol.source.Vector({ wrapX: false })}, { $scope: scope });
}));

$onInit() $onChanges() ,

Answer 3

. :

describe('Component: Test Method', function () {

        beforeEach(inject(function (_$rootScope_) {
            scope = _$rootScope_.$new();
        }));


        it('should set value of selectedPackage to null after $onChanges event', inject(function ($compile) {
            // Trigger 1st $onChanges
            scope.selectedPackage = 'packageCode';

            var element = angular.element('<select-my-tv selected-package="selectedPackage"></select-my-tv>');
            element = $compile(element)(scope);
            scope.$digest();

            //Extract the Controller reference from compiled element
            var elementController = element.isolateScope().$ctrl;

            // Assert
            expect(elementController.selectedPackage).toBeNull();
        }));
    });
});