111 lines
2.7 KiB
JavaScript
111 lines
2.7 KiB
JavaScript
import { print } from 'graphql';
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import { gql } from '@apollo/client/core';
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import cable from '~/actioncable_consumer';
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import ActionCableLink from '~/actioncable_link';
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// Mock uuids module for determinism
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jest.mock('~/lib/utils/uuids', () => ({
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uuids: () => ['testuuid'],
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}));
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const TEST_OPERATION = {
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query: gql`
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query foo {
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project {
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id
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}
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}
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`,
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operationName: 'foo',
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variables: [],
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};
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/**
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* Create an observer that passes calls to the given spy.
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*
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* This helps us assert which calls were made in what order.
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*/
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const createSpyObserver = (spy) => ({
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next: (...args) => spy('next', ...args),
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error: (...args) => spy('error', ...args),
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complete: (...args) => spy('complete', ...args),
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});
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const notify = (...notifications) => {
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notifications.forEach((data) => cable.subscriptions.notifyAll('received', data));
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};
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const getSubscriptionCount = () => cable.subscriptions.subscriptions.length;
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describe('~/actioncable_link', () => {
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let cableLink;
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beforeEach(() => {
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jest.spyOn(cable.subscriptions, 'create');
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cableLink = new ActionCableLink();
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});
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describe('request', () => {
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let subscription;
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let spy;
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beforeEach(() => {
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spy = jest.fn();
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subscription = cableLink.request(TEST_OPERATION).subscribe(createSpyObserver(spy));
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});
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afterEach(() => {
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subscription.unsubscribe();
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});
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it('creates a subscription', () => {
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expect(getSubscriptionCount()).toBe(1);
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expect(cable.subscriptions.create).toHaveBeenCalledWith(
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{
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channel: 'GraphqlChannel',
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nonce: 'testuuid',
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...TEST_OPERATION,
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query: print(TEST_OPERATION.query),
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},
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{ received: expect.any(Function) },
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);
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});
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it('when "unsubscribe", unsubscribes underlying cable subscription', () => {
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subscription.unsubscribe();
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expect(getSubscriptionCount()).toBe(0);
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});
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it('when receives data, triggers observer until no ".more"', () => {
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notify(
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{ result: 'test result', more: true },
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{ result: 'test result 2', more: true },
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{ result: 'test result 3' },
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{ result: 'test result 4' },
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);
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expect(spy.mock.calls).toEqual([
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['next', 'test result'],
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['next', 'test result 2'],
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['next', 'test result 3'],
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['complete'],
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]);
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});
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it('when receives errors, triggers observer', () => {
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notify(
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{ result: 'test result', more: true },
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{ result: 'test result 2', errors: ['boom!'], more: true },
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{ result: 'test result 3' },
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);
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expect(spy.mock.calls).toEqual([
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['next', 'test result'],
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['error', ['boom!']],
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]);
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});
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});
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});
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