145 lines
4.5 KiB
JavaScript
145 lines
4.5 KiB
JavaScript
import { start } from '~/code_review/signals';
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import diffsEventHub from '~/diffs/event_hub';
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import { EVT_MR_PREPARED } from '~/diffs/constants';
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import { getDerivedMergeRequestInformation } from '~/diffs/utils/merge_request';
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jest.mock('~/diffs/utils/merge_request');
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describe('~/code_review', () => {
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const io = diffsEventHub;
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beforeAll(() => {
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getDerivedMergeRequestInformation.mockImplementation(() => ({
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namespace: 'x',
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project: 'y',
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id: '1',
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}));
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});
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describe('start', () => {
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it.each`
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description | argument
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${'no event hub is provided'} | ${{}}
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${'no parameters are provided'} | ${undefined}
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`('throws an error if $description', async ({ argument }) => {
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await expect(() => start(argument)).rejects.toThrow('signalBus is a required argument');
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});
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describe('observeMergeRequestFinishingPreparation', () => {
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const callArgs = {};
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const apollo = {};
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let querySpy;
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let apolloSubscribeSpy;
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let subscribeSpy;
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let nextSpy;
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let unsubscribeSpy;
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let observable;
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beforeEach(() => {
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querySpy = jest.fn();
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apolloSubscribeSpy = jest.fn();
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subscribeSpy = jest.fn();
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unsubscribeSpy = jest.fn();
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nextSpy = jest.fn();
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observable = {
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next: nextSpy,
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subscribe: subscribeSpy.mockReturnValue({
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unsubscribe: unsubscribeSpy,
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}),
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};
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querySpy.mockResolvedValue({
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data: { project: { mergeRequest: { id: 'gql:id:1', preparedAt: 'x' } } },
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});
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apolloSubscribeSpy.mockReturnValue(observable);
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apollo.query = querySpy;
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apollo.subscribe = apolloSubscribeSpy;
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callArgs.signalBus = io;
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callArgs.apolloClient = apollo;
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});
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it('does not query at all if the page does not seem like a merge request', async () => {
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getDerivedMergeRequestInformation.mockImplementationOnce(() => ({}));
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await start(callArgs);
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expect(querySpy).not.toHaveBeenCalled();
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expect(apolloSubscribeSpy).not.toHaveBeenCalled();
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});
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describe('on a merge request page', () => {
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it('requests the preparedAt (and id) for the current merge request', async () => {
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await start(callArgs);
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expect(querySpy).toHaveBeenCalledWith(
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expect.objectContaining({
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variables: {
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projectPath: 'x/y',
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iid: '1',
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},
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}),
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);
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});
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it('does not subscribe to any updates if the preparedAt value is already populated', async () => {
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await start(callArgs);
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expect(apolloSubscribeSpy).not.toHaveBeenCalled();
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});
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describe('if the merge request is still asynchronously preparing', () => {
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beforeEach(() => {
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querySpy.mockResolvedValue({
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data: { project: { mergeRequest: { id: 'gql:id:1', preparedAt: null } } },
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});
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});
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it('subscribes to updates', async () => {
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await start(callArgs);
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expect(apolloSubscribeSpy).toHaveBeenCalledWith(
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expect.objectContaining({ variables: { issuableId: 'gql:id:1' } }),
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);
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expect(observable.subscribe).toHaveBeenCalled();
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});
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describe('when the MR has been updated', () => {
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let emitSpy;
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let behavior;
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beforeEach(() => {
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emitSpy = jest.spyOn(diffsEventHub, '$emit');
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nextSpy.mockImplementation((data) => behavior?.(data));
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subscribeSpy.mockImplementation((handler) => {
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behavior = handler;
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return { unsubscribe: unsubscribeSpy };
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});
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});
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it('does nothing if the MR has not yet finished preparing', async () => {
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await start(callArgs);
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observable.next({ data: { mergeRequestMergeStatusUpdated: { preparedAt: null } } });
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expect(unsubscribeSpy).not.toHaveBeenCalled();
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expect(emitSpy).not.toHaveBeenCalled();
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});
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it('emits an event and unsubscribes when the MR is prepared', async () => {
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await start(callArgs);
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observable.next({ data: { mergeRequestMergeStatusUpdated: { preparedAt: 'x' } } });
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expect(unsubscribeSpy).toHaveBeenCalled();
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expect(emitSpy).toHaveBeenCalledWith(EVT_MR_PREPARED);
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});
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});
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});
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});
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});
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});
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});
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