184 lines
4.9 KiB
JavaScript
184 lines
4.9 KiB
JavaScript
import MockAdapter from 'axios-mock-adapter';
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import axios from '~/lib/utils/axios_utils';
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import AjaxCache from '~/lib/utils/ajax_cache';
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describe('AjaxCache', () => {
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const dummyEndpoint = '/AjaxCache/dummyEndpoint';
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const dummyResponse = {
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important: 'dummy data',
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};
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beforeEach(() => {
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AjaxCache.internalStorage = { };
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AjaxCache.pendingRequests = { };
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});
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describe('get', () => {
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it('returns undefined if cache is empty', () => {
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const data = AjaxCache.get(dummyEndpoint);
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expect(data).toBe(undefined);
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});
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it('returns undefined if cache contains no matching data', () => {
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AjaxCache.internalStorage['not matching'] = dummyResponse;
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const data = AjaxCache.get(dummyEndpoint);
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expect(data).toBe(undefined);
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});
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it('returns matching data', () => {
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AjaxCache.internalStorage[dummyEndpoint] = dummyResponse;
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const data = AjaxCache.get(dummyEndpoint);
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expect(data).toBe(dummyResponse);
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});
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});
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describe('hasData', () => {
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it('returns false if cache is empty', () => {
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expect(AjaxCache.hasData(dummyEndpoint)).toBe(false);
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});
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it('returns false if cache contains no matching data', () => {
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AjaxCache.internalStorage['not matching'] = dummyResponse;
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expect(AjaxCache.hasData(dummyEndpoint)).toBe(false);
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});
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it('returns true if data is available', () => {
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AjaxCache.internalStorage[dummyEndpoint] = dummyResponse;
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expect(AjaxCache.hasData(dummyEndpoint)).toBe(true);
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});
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});
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describe('remove', () => {
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it('does nothing if cache is empty', () => {
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AjaxCache.remove(dummyEndpoint);
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expect(AjaxCache.internalStorage).toEqual({ });
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});
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it('does nothing if cache contains no matching data', () => {
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AjaxCache.internalStorage['not matching'] = dummyResponse;
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AjaxCache.remove(dummyEndpoint);
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expect(AjaxCache.internalStorage['not matching']).toBe(dummyResponse);
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});
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it('removes matching data', () => {
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AjaxCache.internalStorage[dummyEndpoint] = dummyResponse;
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AjaxCache.remove(dummyEndpoint);
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expect(AjaxCache.internalStorage).toEqual({ });
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});
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});
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describe('override', () => {
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it('overrides existing cache', () => {
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AjaxCache.internalStorage.endpoint = 'existing-endpoint';
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AjaxCache.override('endpoint', 'new-endpoint');
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expect(AjaxCache.internalStorage.endpoint).toEqual('new-endpoint');
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});
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});
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describe('retrieve', () => {
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let mock;
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beforeEach(() => {
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mock = new MockAdapter(axios);
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spyOn(axios, 'get').and.callThrough();
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});
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afterEach(() => {
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mock.restore();
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});
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it('stores and returns data from Ajax call if cache is empty', (done) => {
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mock.onGet(dummyEndpoint).reply(200, dummyResponse);
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AjaxCache.retrieve(dummyEndpoint)
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.then((data) => {
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expect(data).toEqual(dummyResponse);
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expect(AjaxCache.internalStorage[dummyEndpoint]).toEqual(dummyResponse);
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})
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.then(done)
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.catch(fail);
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});
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it('makes no Ajax call if request is pending', (done) => {
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mock.onGet(dummyEndpoint).reply(200, dummyResponse);
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AjaxCache.retrieve(dummyEndpoint)
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.then(done)
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.catch(fail);
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AjaxCache.retrieve(dummyEndpoint)
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.then(done)
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.catch(fail);
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expect(axios.get.calls.count()).toBe(1);
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});
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it('returns undefined if Ajax call fails and cache is empty', (done) => {
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const errorMessage = 'Network Error';
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mock.onGet(dummyEndpoint).networkError();
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AjaxCache.retrieve(dummyEndpoint)
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.then(data => fail(`Received unexpected data: ${JSON.stringify(data)}`))
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.catch((error) => {
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expect(error.message).toBe(`${dummyEndpoint}: ${errorMessage}`);
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expect(error.textStatus).toBe(errorMessage);
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done();
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})
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.catch(fail);
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});
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it('makes no Ajax call if matching data exists', (done) => {
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AjaxCache.internalStorage[dummyEndpoint] = dummyResponse;
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mock.onGet(dummyEndpoint).reply(() => {
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fail(new Error('expected no Ajax call!'));
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});
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AjaxCache.retrieve(dummyEndpoint)
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.then((data) => {
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expect(data).toBe(dummyResponse);
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})
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.then(done)
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.catch(fail);
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});
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it('makes Ajax call even if matching data exists when forceRequest parameter is provided', (done) => {
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const oldDummyResponse = {
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important: 'old dummy data',
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};
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AjaxCache.internalStorage[dummyEndpoint] = oldDummyResponse;
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mock.onGet(dummyEndpoint).reply(200, dummyResponse);
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// Call without forceRetrieve param
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AjaxCache.retrieve(dummyEndpoint)
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.then((data) => {
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expect(data).toBe(oldDummyResponse);
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})
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.then(done)
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.catch(fail);
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// Call with forceRetrieve param
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AjaxCache.retrieve(dummyEndpoint, true)
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.then((data) => {
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expect(data).toEqual(dummyResponse);
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})
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.then(done)
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.catch(fail);
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});
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});
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});
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