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