import MockAdapter from 'axios-mock-adapter'; import $ from 'jquery'; import { setHTMLFixture, resetHTMLFixture } from 'helpers/fixtures'; import { TEST_HOST } from 'helpers/test_constants'; import waitForPromises from 'helpers/wait_for_promises'; import axios from '~/lib/utils/axios_utils'; import { removeParams } from '~/lib/utils/url_utility'; import Pager from '~/pager'; jest.mock('~/lib/utils/url_utility', () => ({ ...jest.requireActual('~/lib/utils/url_utility'), removeParams: jest.fn().mockName('removeParams'), })); describe('pager', () => { let axiosMock; beforeEach(() => { axiosMock = new MockAdapter(axios); }); afterEach(() => { axiosMock.restore(); }); describe('init', () => { const originalHref = window.location.href; beforeEach(() => { setHTMLFixture('
'); jest.spyOn($.fn, 'endlessScroll').mockImplementation(); }); afterEach(() => { window.history.replaceState({}, null, originalHref); resetHTMLFixture(); }); it('should get initial offset from query parameter', () => { window.history.replaceState({}, null, '?offset=100'); Pager.init(); expect(Pager.offset).toBe(100); }); }); describe('getOld', () => { const urlRegex = /(.*)some_list(.*)$/; function mockSuccess(count = 0) { axiosMock.onGet(urlRegex).reply(200, { count, html: '', }); } function mockError() { axiosMock.onGet(urlRegex).networkError(); } beforeEach(() => { setHTMLFixture( '
', ); jest.spyOn(axios, 'get'); Pager.init(); }); afterEach(() => { resetHTMLFixture(); }); it('shows loader while loading next page', async () => { mockSuccess(); jest.spyOn(Pager.$loading, 'show').mockImplementation(() => {}); Pager.getOld(); await waitForPromises(); expect(Pager.$loading.show).toHaveBeenCalled(); }); it('hides loader on success', async () => { mockSuccess(); jest.spyOn(Pager.$loading, 'hide').mockImplementation(() => {}); Pager.getOld(); await waitForPromises(); expect(Pager.$loading.hide).toHaveBeenCalled(); }); it('hides loader on error', async () => { mockError(); jest.spyOn(Pager.$loading, 'hide').mockImplementation(() => {}); Pager.getOld(); await waitForPromises(); expect(Pager.$loading.hide).toHaveBeenCalled(); }); it('sends request to url with offset and limit params', async () => { Pager.offset = 100; Pager.limit = 20; Pager.getOld(); await waitForPromises(); const [url, params] = axios.get.mock.calls[0]; expect(params).toEqual({ params: { limit: 20, offset: 100, }, }); expect(url).toBe('/some_list'); }); it('disables if return count is less than limit', async () => { Pager.offset = 0; Pager.limit = 20; mockSuccess(1); jest.spyOn(Pager.$loading, 'hide').mockImplementation(() => {}); Pager.getOld(); await waitForPromises(); expect(Pager.$loading.hide).toHaveBeenCalled(); expect(Pager.disable).toBe(true); }); describe('has data-href attribute from list element', () => { const href = `${TEST_HOST}/some_list.json`; beforeEach(() => { setHTMLFixture(`
`); }); afterEach(() => { resetHTMLFixture(); }); it('should use data-href attribute', () => { Pager.getOld(); expect(axios.get).toHaveBeenCalledWith(href, expect.any(Object)); }); it('should not use current url', () => { Pager.getOld(); expect(removeParams).not.toHaveBeenCalled(); expect(removeParams).not.toHaveBeenCalledWith(href); }); }); describe('no data-href attribute attribute provided from list element', () => { beforeEach(() => { setHTMLFixture(`
`); }); afterEach(() => { resetHTMLFixture(); }); it('should use current url', () => { const href = `${TEST_HOST}/some_list`; removeParams.mockReturnValue(href); Pager.getOld(); expect(axios.get).toHaveBeenCalledWith(href, expect.any(Object)); }); it('keeps extra query parameters from url', () => { window.history.replaceState({}, null, '?filter=test&offset=100'); const href = `${TEST_HOST}/some_list?filter=test`; removeParams.mockReturnValue(href); Pager.getOld(); expect(removeParams).toHaveBeenCalledWith(['limit', 'offset']); expect(axios.get).toHaveBeenCalledWith(href, expect.any(Object)); }); }); describe('when `container` is passed', () => { const href = '/some_list'; const container = '#js-pager'; let endlessScrollCallback; beforeEach(() => { jest.spyOn(axios, 'get'); jest.spyOn($.fn, 'endlessScroll').mockImplementation(({ callback }) => { endlessScrollCallback = callback; }); }); describe('when `container` is visible', () => { it('makes API request', () => { setHTMLFixture( `
`, ); Pager.init({ container }); endlessScrollCallback(); expect(axios.get).toHaveBeenCalledWith(href, expect.any(Object)); resetHTMLFixture(); }); }); describe('when `container` is not visible', () => { it('does not make API request', () => { setHTMLFixture( ``, ); Pager.init({ container }); endlessScrollCallback(); expect(axios.get).not.toHaveBeenCalled(); resetHTMLFixture(); }); }); }); }); });