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import { useLocalStorageSpy } from 'helpers/local_storage_helper';
import RecentSearchesService from '~/filtered_search/services/recent_searches_service';
import RecentSearchesServiceError from '~/filtered_search/services/recent_searches_service_error';
import AccessorUtilities from '~/lib/utils/accessor';
useLocalStorageSpy();
describe('RecentSearchesService', () => {
let service;
beforeEach(() => {
service = new RecentSearchesService();
localStorage.removeItem(service.localStorageKey);
});
describe('fetch', () => {
beforeEach(() => {
jest.spyOn(RecentSearchesService, 'isAvailable').mockReturnValue(true);
});
it('should default to empty array', () => {
const fetchItemsPromise = service.fetch();
return fetchItemsPromise.then((items) => {
expect(items).toEqual([]);
});
});
it('should reject when unable to parse', () => {
jest.spyOn(localStorage, 'getItem').mockReturnValue('fail');
const fetchItemsPromise = service.fetch();
return fetchItemsPromise
.then(() => {
throw new Error();
})
.catch((error) => {
expect(error).toEqual(expect.any(SyntaxError));
});
});
it('should reject when service is unavailable', () => {
RecentSearchesService.isAvailable.mockReturnValue(false);
return service
.fetch()
.then(() => {
throw new Error();
})
.catch((error) => {
expect(error).toEqual(expect.any(Error));
});
});
it('should return items from localStorage', () => {
jest.spyOn(localStorage, 'getItem').mockReturnValue('["foo", "bar"]');
const fetchItemsPromise = service.fetch();
return fetchItemsPromise.then((items) => {
expect(items).toEqual(['foo', 'bar']);
});
});
describe('if .isAvailable returns `false`', () => {
beforeEach(() => {
RecentSearchesService.isAvailable.mockReturnValue(false);
jest.spyOn(Storage.prototype, 'getItem').mockImplementation(() => {});
});
it('should not call .getItem', () => {
return RecentSearchesService.prototype
.fetch()
.then(() => {
throw new Error();
})
.catch((err) => {
expect(err).toEqual(new RecentSearchesServiceError());
expect(localStorage.getItem).not.toHaveBeenCalled();
});
});
});
});
describe('setRecentSearches', () => {
beforeEach(() => {
jest.spyOn(RecentSearchesService, 'isAvailable').mockReturnValue(true);
});
it('should save things in localStorage', () => {
jest.spyOn(localStorage, 'setItem');
const items = ['foo', 'bar'];
service.save(items);
expect(localStorage.setItem).toHaveBeenCalledWith(expect.any(String), JSON.stringify(items));
});
});
describe('save', () => {
beforeEach(() => {
jest.spyOn(localStorage, 'setItem');
jest.spyOn(RecentSearchesService, 'isAvailable').mockImplementation(() => {});
});
describe('if .isAvailable returns `true`', () => {
const searchesString = 'searchesString';
const localStorageKey = 'localStorageKey';
const recentSearchesService = {
localStorageKey,
};
beforeEach(() => {
RecentSearchesService.isAvailable.mockReturnValue(true);
jest.spyOn(JSON, 'stringify').mockReturnValue(searchesString);
});
it('should call .setItem', () => {
RecentSearchesService.prototype.save.call(recentSearchesService);
expect(localStorage.setItem).toHaveBeenCalledWith(localStorageKey, searchesString);
});
});
describe('if .isAvailable returns `false`', () => {
beforeEach(() => {
RecentSearchesService.isAvailable.mockReturnValue(false);
});
it('should not call .setItem', () => {
RecentSearchesService.prototype.save();
expect(localStorage.setItem).not.toHaveBeenCalled();
});
});
});
describe('isAvailable', () => {
let isAvailable;
beforeEach(() => {
jest.spyOn(AccessorUtilities, 'canUseLocalStorage');
isAvailable = RecentSearchesService.isAvailable();
});
it('should call .canUseLocalStorage', () => {
expect(AccessorUtilities.canUseLocalStorage).toHaveBeenCalled();
});
it('should return a boolean', () => {
expect(typeof isAvailable).toBe('boolean');
});
});
});
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