openmct/platform/commonUI/browse/test/navigation/NavigationServiceSpec.js

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/**
 * MCTRepresentationSpec. Created by vwoeltje on 11/6/14.
 */
define(
    ["../../src/navigation/NavigationService"],
    function (NavigationService) {

        describe("The navigation service", function () {
            var $window,
                navigationService;

            beforeEach(function () {
                $window = jasmine.createSpyObj('$window', ['confirm']);
                navigationService = new NavigationService($window);
            });

            it("stores navigation state", function () {
                var testObject = { someKey: 42 },
                    otherObject = { someKey: "some value" };
                expect(navigationService.getNavigation())
                    .toBeUndefined();
                navigationService.setNavigation(testObject);
                expect(navigationService.getNavigation())
                    .toBe(testObject);
                expect(navigationService.getNavigation())
                    .toBe(testObject);
                navigationService.setNavigation(otherObject);
                expect(navigationService.getNavigation())
                    .toBe(otherObject);
            });

            it("notifies listeners on change", function () {
                var testObject = { someKey: 42 },
                    callback = jasmine.createSpy("callback");

                navigationService.addListener(callback);
                expect(callback).not.toHaveBeenCalled();

                navigationService.setNavigation(testObject);
                expect(callback).toHaveBeenCalledWith(testObject);
            });

            it("does not notify listeners when no changes occur", function () {
                var testObject = { someKey: 42 },
                    callback = jasmine.createSpy("callback");

                navigationService.addListener(callback);
                navigationService.setNavigation(testObject);
                navigationService.setNavigation(testObject);
                expect(callback.calls.length).toEqual(1);
            });

            it("stops notifying listeners after removal", function () {
                var testObject = { someKey: 42 },
                    callback = jasmine.createSpy("callback");

                navigationService.addListener(callback);
                navigationService.removeListener(callback);


                navigationService.setNavigation(testObject);
                expect(callback).not.toHaveBeenCalled();
            });

        });
    }
);