136 lines
3.6 KiB
JavaScript
136 lines
3.6 KiB
JavaScript
import Api from '~/api';
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import UsersCache from '~/lib/utils/users_cache';
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describe('UsersCache', () => {
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const dummyUsername = 'win';
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const dummyUser = 'has a farm';
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beforeEach(() => {
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UsersCache.internalStorage = { };
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});
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describe('get', () => {
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it('returns undefined for empty cache', () => {
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expect(UsersCache.internalStorage).toEqual({ });
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const user = UsersCache.get(dummyUsername);
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expect(user).toBe(undefined);
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});
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it('returns undefined for missing user', () => {
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UsersCache.internalStorage['no body'] = 'no data';
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const user = UsersCache.get(dummyUsername);
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expect(user).toBe(undefined);
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});
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it('returns matching user', () => {
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UsersCache.internalStorage[dummyUsername] = dummyUser;
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const user = UsersCache.get(dummyUsername);
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expect(user).toBe(dummyUser);
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});
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});
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describe('hasData', () => {
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it('returns false for empty cache', () => {
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expect(UsersCache.internalStorage).toEqual({ });
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expect(UsersCache.hasData(dummyUsername)).toBe(false);
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});
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it('returns false for missing user', () => {
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UsersCache.internalStorage['no body'] = 'no data';
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expect(UsersCache.hasData(dummyUsername)).toBe(false);
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});
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it('returns true for matching user', () => {
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UsersCache.internalStorage[dummyUsername] = dummyUser;
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expect(UsersCache.hasData(dummyUsername)).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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expect(UsersCache.internalStorage).toEqual({ });
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UsersCache.remove(dummyUsername);
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expect(UsersCache.internalStorage).toEqual({ });
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});
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it('does nothing if cache contains no matching data', () => {
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UsersCache.internalStorage['no body'] = 'no data';
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UsersCache.remove(dummyUsername);
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expect(UsersCache.internalStorage['no body']).toBe('no data');
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});
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it('removes matching data', () => {
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UsersCache.internalStorage[dummyUsername] = dummyUser;
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UsersCache.remove(dummyUsername);
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expect(UsersCache.internalStorage).toEqual({ });
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});
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});
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describe('retrieve', () => {
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let apiSpy;
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beforeEach(() => {
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spyOn(Api, 'users').and.callFake((query, options) => apiSpy(query, options));
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});
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it('stores and returns data from API call if cache is empty', (done) => {
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apiSpy = (query, options) => {
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expect(query).toBe('');
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expect(options).toEqual({ username: dummyUsername });
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return Promise.resolve([dummyUser]);
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};
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UsersCache.retrieve(dummyUsername)
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.then((user) => {
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expect(user).toBe(dummyUser);
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expect(UsersCache.internalStorage[dummyUsername]).toBe(dummyUser);
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})
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.then(done)
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.catch(done.fail);
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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 dummyError = new Error('server exploded');
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apiSpy = (query, options) => {
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expect(query).toBe('');
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expect(options).toEqual({ username: dummyUsername });
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return Promise.reject(dummyError);
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};
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UsersCache.retrieve(dummyUsername)
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.then(user => fail(`Received unexpected user: ${JSON.stringify(user)}`))
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.catch((error) => {
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expect(error).toBe(dummyError);
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})
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.then(done)
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.catch(done.fail);
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});
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it('makes no Ajax call if matching data exists', (done) => {
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UsersCache.internalStorage[dummyUsername] = dummyUser;
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apiSpy = () => fail(new Error('expected no Ajax call!'));
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UsersCache.retrieve(dummyUsername)
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.then((user) => {
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expect(user).toBe(dummyUser);
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})
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.then(done)
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.catch(done.fail);
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});
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});
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});
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