import './watcher.js';

describe('Component vnWatcher', () => {
    let $componentController;
    let $scope;
    let $element;
    let $state;
    let $transitions;
    let $httpBackend;
    let vnApp;
    let $translate;

    beforeEach(() => {
        angular.mock.module('client');
    });

    beforeEach(angular.mock.inject((_$componentController_, $rootScope, _$state_, _$transitions_, _$httpBackend_, _vnApp_, _$translate_) => {
        $componentController = _$componentController_;
        $scope = $rootScope.$new();
        $element = angular.element('<div></div>');
        $state = _$state_;
        vnApp = _vnApp_;
        $transitions = _$transitions_;
        $httpBackend = _$httpBackend_;
        $translate = _$translate_;
    }));

    describe('$onInit() ', () => {
        it(`should call fetchData() if controllers get and url properties are defined`, () => {
            let controller = $componentController('vnWatcher', {$scope, $element, $state, vnApp, $transitions, $httpBackend, $translate});
            controller.get = () => {};
            controller.url = 'test.com';
            spyOn(controller, 'fetchData');
            controller.$onInit();

            expect(controller.fetchData).toHaveBeenCalledWith();
        });

        it(`should throw an error if $onInit is called without url defined`, () => {
            let controller = $componentController('vnWatcher', {$scope, $element, $state, vnApp, $transitions, $httpBackend, $translate});
            controller.get = () => {};

            expect(function() {
                controller.$onInit();
            }).toThrow(new Error('Error: Parameter url ommitted'));
        });
    });

    describe('$onChanges() ', () => {
        it(`should call updateOriginalData() if controllers data is defined`, () => {
            let controller = $componentController('vnWatcher', {$scope, $element, $state, vnApp, $transitions, $httpBackend, $translate});
            controller.data = [];
            spyOn(controller, 'updateOriginalData');
            controller.$onChanges();

            expect(controller.updateOriginalData).toHaveBeenCalledWith();
        });
    });

    describe('$onDestroy() ', () => {
        it(`should allways call deregisterCallback()`, () => {
            let controller = $componentController('vnWatcher', {$scope, $element, $state, vnApp, $transitions, $httpBackend, $translate});
            spyOn(controller, 'deregisterCallback');
            controller.$onDestroy();

            expect(controller.deregisterCallback).toHaveBeenCalledWith();
        });
    });
});