debian-mirror-gitlab/spec/frontend/lib/utils/users_cache_spec.js

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import * as UserApi from '~/api/user_api';
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import UsersCache from '~/lib/utils/users_cache';
describe('UsersCache', () => {
const dummyUsername = 'win';
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const dummyUserId = 123;
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const dummyUser = {
name: 'has a farm',
username: 'farmer',
};
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const dummyUserStatus = 'my status';
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beforeEach(() => {
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UsersCache.internalStorage = {};
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});
describe('get', () => {
it('returns undefined for empty cache', () => {
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expect(UsersCache.internalStorage).toEqual({});
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const user = UsersCache.get(dummyUsername);
expect(user).toBe(undefined);
});
it('returns undefined for missing user', () => {
UsersCache.internalStorage['no body'] = 'no data';
const user = UsersCache.get(dummyUsername);
expect(user).toBe(undefined);
});
it('returns matching user', () => {
UsersCache.internalStorage[dummyUsername] = dummyUser;
const user = UsersCache.get(dummyUsername);
expect(user).toBe(dummyUser);
});
});
describe('hasData', () => {
it('returns false for empty cache', () => {
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expect(UsersCache.internalStorage).toEqual({});
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expect(UsersCache.hasData(dummyUsername)).toBe(false);
});
it('returns false for missing user', () => {
UsersCache.internalStorage['no body'] = 'no data';
expect(UsersCache.hasData(dummyUsername)).toBe(false);
});
it('returns true for matching user', () => {
UsersCache.internalStorage[dummyUsername] = dummyUser;
expect(UsersCache.hasData(dummyUsername)).toBe(true);
});
});
describe('remove', () => {
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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});
it('does nothing if cache contains no matching data', () => {
UsersCache.internalStorage['no body'] = 'no data';
UsersCache.remove(dummyUsername);
expect(UsersCache.internalStorage['no body']).toBe('no data');
});
it('removes matching data', () => {
UsersCache.internalStorage[dummyUsername] = dummyUser;
UsersCache.remove(dummyUsername);
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expect(UsersCache.internalStorage).toEqual({});
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});
});
describe('retrieve', () => {
let apiSpy;
beforeEach(() => {
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jest
.spyOn(UserApi, 'getUsers')
.mockImplementation((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) => {
expect(query).toBe('');
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expect(options).toEqual({
username: dummyUsername,
});
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return Promise.resolve({
data: [dummyUser],
});
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};
UsersCache.retrieve(dummyUsername)
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.then((user) => {
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expect(user).toBe(dummyUser);
expect(UsersCache.internalStorage[dummyUsername]).toBe(dummyUser);
})
.then(done)
.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) => {
expect(query).toBe('');
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expect(options).toEqual({
username: dummyUsername,
});
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return Promise.reject(dummyError);
};
UsersCache.retrieve(dummyUsername)
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.then((user) => done.fail(`Received unexpected user: ${JSON.stringify(user)}`))
.catch((error) => {
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expect(error).toBe(dummyError);
})
.then(done)
.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 = () => done.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);
})
.then(done)
.catch(done.fail);
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});
});
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describe('retrieveById', () => {
let apiSpy;
beforeEach(() => {
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jest.spyOn(UserApi, 'getUser').mockImplementation((id) => apiSpy(id));
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});
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it('stores and returns data from API call if cache is empty', (done) => {
apiSpy = (id) => {
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expect(id).toBe(dummyUserId);
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return Promise.resolve({
data: dummyUser,
});
};
UsersCache.retrieveById(dummyUserId)
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.then((user) => {
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expect(user).toBe(dummyUser);
expect(UsersCache.internalStorage[dummyUserId]).toBe(dummyUser);
})
.then(done)
.catch(done.fail);
});
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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 = (id) => {
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expect(id).toBe(dummyUserId);
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return Promise.reject(dummyError);
};
UsersCache.retrieveById(dummyUserId)
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.then((user) => done.fail(`Received unexpected user: ${JSON.stringify(user)}`))
.catch((error) => {
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expect(error).toBe(dummyError);
})
.then(done)
.catch(done.fail);
});
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it('makes no Ajax call if matching data exists', (done) => {
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UsersCache.internalStorage[dummyUserId] = dummyUser;
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apiSpy = () => done.fail(new Error('expected no Ajax call!'));
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UsersCache.retrieveById(dummyUserId)
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.then((user) => {
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expect(user).toBe(dummyUser);
})
.then(done)
.catch(done.fail);
});
});
describe('retrieveStatusById', () => {
let apiSpy;
beforeEach(() => {
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jest.spyOn(UserApi, 'getUserStatus').mockImplementation((id) => apiSpy(id));
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});
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it('stores and returns data from API call if cache is empty', (done) => {
apiSpy = (id) => {
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expect(id).toBe(dummyUserId);
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return Promise.resolve({
data: dummyUserStatus,
});
};
UsersCache.retrieveStatusById(dummyUserId)
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.then((userStatus) => {
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expect(userStatus).toBe(dummyUserStatus);
expect(UsersCache.internalStorage[dummyUserId].status).toBe(dummyUserStatus);
})
.then(done)
.catch(done.fail);
});
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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 = (id) => {
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expect(id).toBe(dummyUserId);
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return Promise.reject(dummyError);
};
UsersCache.retrieveStatusById(dummyUserId)
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.then((userStatus) => done.fail(`Received unexpected user: ${JSON.stringify(userStatus)}`))
.catch((error) => {
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expect(error).toBe(dummyError);
})
.then(done)
.catch(done.fail);
});
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it('makes no Ajax call if matching data exists', (done) => {
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UsersCache.internalStorage[dummyUserId] = {
status: dummyUserStatus,
};
apiSpy = () => done.fail(new Error('expected no Ajax call!'));
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UsersCache.retrieveStatusById(dummyUserId)
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.then((userStatus) => {
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expect(userStatus).toBe(dummyUserStatus);
})
.then(done)
.catch(done.fail);
});
});
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});