import $ from 'jquery'; import { useLocalStorageSpy } from 'helpers/local_storage_helper'; import Autosave from '~/autosave'; import AccessorUtilities from '~/lib/utils/accessor'; describe('Autosave', () => { useLocalStorageSpy(); let autosave; const field = $(''); const key = 'key'; const fallbackKey = 'fallbackKey'; const lockVersionKey = 'lockVersionKey'; const lockVersion = 1; describe('class constructor', () => { beforeEach(() => { jest.spyOn(AccessorUtilities, 'canUseLocalStorage').mockReturnValue(true); jest.spyOn(Autosave.prototype, 'restore').mockImplementation(() => {}); }); it('should set .isLocalStorageAvailable', () => { autosave = new Autosave(field, key); expect(AccessorUtilities.canUseLocalStorage).toHaveBeenCalled(); expect(autosave.isLocalStorageAvailable).toBe(true); }); it('should set .isLocalStorageAvailable if fallbackKey is passed', () => { autosave = new Autosave(field, key, fallbackKey); expect(AccessorUtilities.canUseLocalStorage).toHaveBeenCalled(); expect(autosave.isLocalStorageAvailable).toBe(true); }); it('should set .isLocalStorageAvailable if lockVersion is passed', () => { autosave = new Autosave(field, key, null, lockVersion); expect(AccessorUtilities.canUseLocalStorage).toHaveBeenCalled(); expect(autosave.isLocalStorageAvailable).toBe(true); }); }); describe('restore', () => { beforeEach(() => { autosave = { field, key, }; }); describe('if .isLocalStorageAvailable is `false`', () => { beforeEach(() => { autosave.isLocalStorageAvailable = false; Autosave.prototype.restore.call(autosave); }); it('should not call .getItem', () => { expect(window.localStorage.getItem).not.toHaveBeenCalled(); }); }); describe('if .isLocalStorageAvailable is `true`', () => { beforeEach(() => { autosave.isLocalStorageAvailable = true; }); it('should call .getItem', () => { Autosave.prototype.restore.call(autosave); expect(window.localStorage.getItem).toHaveBeenCalledWith(key); }); it('triggers jquery event', () => { jest.spyOn(autosave.field, 'trigger').mockImplementation(() => {}); Autosave.prototype.restore.call(autosave); expect(field.trigger).toHaveBeenCalled(); }); it('triggers native event', () => { const fieldElement = autosave.field.get(0); const eventHandler = jest.fn(); fieldElement.addEventListener('change', eventHandler); Autosave.prototype.restore.call(autosave); expect(eventHandler).toHaveBeenCalledTimes(1); fieldElement.removeEventListener('change', eventHandler); }); }); describe('if field gets deleted from DOM', () => { beforeEach(() => { autosave.field = $('.not-a-real-element'); }); it('does not trigger event', () => { jest.spyOn(field, 'trigger'); expect(field.trigger).not.toHaveBeenCalled(); }); }); }); describe('getSavedLockVersion', () => { beforeEach(() => { autosave = { field, key, lockVersionKey, }; }); describe('if .isLocalStorageAvailable is `false`', () => { beforeEach(() => { autosave.isLocalStorageAvailable = false; Autosave.prototype.getSavedLockVersion.call(autosave); }); it('should not call .getItem', () => { expect(window.localStorage.getItem).not.toHaveBeenCalled(); }); }); describe('if .isLocalStorageAvailable is `true`', () => { beforeEach(() => { autosave.isLocalStorageAvailable = true; }); it('should call .getItem', () => { Autosave.prototype.getSavedLockVersion.call(autosave); expect(window.localStorage.getItem).toHaveBeenCalledWith(lockVersionKey); }); }); }); describe('save', () => { beforeEach(() => { autosave = { reset: jest.fn() }; autosave.field = field; field.val('value'); }); describe('if .isLocalStorageAvailable is `false`', () => { beforeEach(() => { autosave.isLocalStorageAvailable = false; Autosave.prototype.save.call(autosave); }); it('should not call .setItem', () => { expect(window.localStorage.setItem).not.toHaveBeenCalled(); }); }); describe('if .isLocalStorageAvailable is `true`', () => { beforeEach(() => { autosave.isLocalStorageAvailable = true; Autosave.prototype.save.call(autosave); }); it('should call .setItem', () => { expect(window.localStorage.setItem).toHaveBeenCalled(); }); }); }); describe('save with lockVersion', () => { beforeEach(() => { autosave = { field, key, lockVersionKey, lockVersion, isLocalStorageAvailable: true, }; }); describe('lockVersion is valid', () => { it('should call .setItem', () => { Autosave.prototype.save.call(autosave); expect(window.localStorage.setItem).toHaveBeenCalledWith(lockVersionKey, lockVersion); }); it('should call .setItem when version is 0', () => { autosave.lockVersion = 0; Autosave.prototype.save.call(autosave); expect(window.localStorage.setItem).toHaveBeenCalledWith( lockVersionKey, autosave.lockVersion, ); }); }); describe('lockVersion is invalid', () => { it('should not call .setItem with lockVersion', () => { delete autosave.lockVersion; Autosave.prototype.save.call(autosave); expect(window.localStorage.setItem).not.toHaveBeenCalledWith( lockVersionKey, autosave.lockVersion, ); }); }); }); describe('reset', () => { beforeEach(() => { autosave = { key, lockVersionKey, }; }); describe('if .isLocalStorageAvailable is `false`', () => { beforeEach(() => { autosave.isLocalStorageAvailable = false; Autosave.prototype.reset.call(autosave); }); it('should not call .removeItem', () => { expect(window.localStorage.removeItem).not.toHaveBeenCalled(); }); }); describe('if .isLocalStorageAvailable is `true`', () => { beforeEach(() => { autosave.isLocalStorageAvailable = true; Autosave.prototype.reset.call(autosave); }); it('should call .removeItem', () => { expect(window.localStorage.removeItem).toHaveBeenCalledWith(key); expect(window.localStorage.removeItem).toHaveBeenCalledWith(lockVersionKey); }); }); }); describe('restore with fallbackKey', () => { beforeEach(() => { autosave = { field, key, fallbackKey, isLocalStorageAvailable: true, }; }); it('should call .getItem', () => { Autosave.prototype.restore.call(autosave); expect(window.localStorage.getItem).toHaveBeenCalledWith(fallbackKey); }); it('should call .setItem for key and fallbackKey', () => { Autosave.prototype.save.call(autosave); expect(window.localStorage.setItem).toHaveBeenCalledTimes(2); }); it('should call .removeItem for key and fallbackKey', () => { Autosave.prototype.reset.call(autosave); expect(window.localStorage.removeItem).toHaveBeenCalledWith(fallbackKey); expect(window.localStorage.removeItem).toHaveBeenCalledWith(key); }); }); });