forked from enisdenjo/graphql-ws
-
Notifications
You must be signed in to change notification settings - Fork 0
/
client.ts
809 lines (670 loc) · 19.3 KB
/
client.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
/**
* @jest-environment jsdom
*/
import WebSocket from 'ws';
import { EventEmitter } from 'events';
import { startTServer } from './fixtures/simple';
import { createClient, Client, EventListener } from '../client';
import { SubscribePayload } from '../message';
// simulate browser environment for easier client testing
beforeEach(() => {
Object.assign(global, {
WebSocket: WebSocket,
});
});
// Just does nothing
function noop(): void {
/**/
}
interface TSubscribe<T> {
waitForNext: (test?: (value: T) => void, expire?: number) => Promise<void>;
waitForError: (
test?: (error: unknown) => void,
expire?: number,
) => Promise<void>;
waitForComplete: (test?: () => void, expire?: number) => Promise<void>;
dispose: () => void;
}
function tsubscribe<T = unknown>(
client: Client,
payload: SubscribePayload,
): TSubscribe<T> {
const emitter = new EventEmitter();
const results: T[] = [];
let error: unknown,
completed = false;
const dispose = client.subscribe<T>(payload, {
next: (value) => {
results.push(value);
emitter.emit('next');
},
error: (err) => {
error = err;
emitter.emit('err');
emitter.removeAllListeners();
},
complete: () => {
completed = true;
emitter.emit('complete');
emitter.removeAllListeners();
},
});
return {
waitForNext: (test, expire) => {
return new Promise((resolve) => {
function done() {
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
const result = results.shift()!;
test?.(result);
resolve();
}
if (results.length > 0) {
return done();
}
emitter.once('next', done);
if (expire) {
setTimeout(() => {
emitter.off('next', done); // expired
resolve();
}, expire);
}
});
},
waitForError: (test, expire) => {
return new Promise((resolve) => {
function done() {
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
test?.(error);
resolve();
}
if (error) {
return done();
}
emitter.once('err', done);
if (expire) {
setTimeout(() => {
emitter.off('err', done); // expired
resolve();
}, expire);
}
});
},
waitForComplete: (test, expire) => {
return new Promise((resolve) => {
function done() {
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
test?.();
resolve();
}
if (completed) {
return done();
}
emitter.once('complete', done);
if (expire) {
setTimeout(() => {
emitter.off('complete', done); // expired
resolve();
}, expire);
}
});
},
dispose,
};
}
/**
* Tests
*/
it('should use the provided WebSocket implementation', async () => {
const { url, ...server } = await startTServer();
Object.assign(global, {
WebSocket: null,
});
createClient({
url,
lazy: false,
webSocketImpl: WebSocket,
});
await server.waitForClient();
});
it('should not accept invalid WebSocket implementations', async () => {
const { url } = await startTServer();
Object.assign(global, {
WebSocket: null,
});
expect(() =>
createClient({
url,
lazy: false,
webSocketImpl: {},
}),
).toThrow();
});
it('should recieve optional connection ack payload in event handler', async (done) => {
const { url } = await startTServer({
onConnect: () => ({ itsa: 'me' }),
});
createClient({
url,
lazy: false,
on: {
connected: (_socket, payload) => {
try {
expect(payload).toEqual({ itsa: 'me' });
} catch (err) {
fail(err);
}
done();
},
},
});
});
it('should close with error message during connecting issues', async () => {
const { url } = await startTServer();
const someerr = new Error('Welcome');
const client = createClient({
url,
retryAttempts: 0,
on: {
connected: () => {
// the `connected` listener is called right before successful connection
throw someerr;
},
},
});
const sub = tsubscribe(client, {
query: 'query { getValue }',
});
await sub.waitForError((err) => {
const event = err as CloseEvent;
expect(event.code).toBe(4400);
expect(event.reason).toBe('Welcome');
expect(event.wasClean).toBeTruthy();
});
});
it('should pass the `connectionParams` through', async () => {
const server = await startTServer();
let client = createClient({
url: server.url,
lazy: false,
connectionParams: { auth: 'token' },
});
await server.waitForConnect((ctx) => {
expect(ctx.connectionParams).toEqual({ auth: 'token' });
});
await client.dispose();
client = createClient({
url: server.url,
lazy: false,
connectionParams: () => ({ from: 'func' }),
});
await server.waitForConnect((ctx) => {
expect(ctx.connectionParams).toEqual({ from: 'func' });
});
await client.dispose();
client = createClient({
url: server.url,
lazy: false,
connectionParams: () => Promise.resolve({ from: 'promise' }),
});
await server.waitForConnect((ctx) => {
expect(ctx.connectionParams).toEqual({ from: 'promise' });
});
});
it('should close the socket if the `connectionParams` rejects or throws', async () => {
const server = await startTServer();
let client = createClient({
url: server.url,
retryAttempts: 0,
connectionParams: () => {
throw new Error('No auth?');
},
});
let sub = tsubscribe(client, { query: '{ getValue }' });
await sub.waitForError((err) => {
const event = err as CloseEvent;
expect(event.code).toBe(4400);
expect(event.reason).toBe('No auth?');
expect(event.wasClean).toBeTruthy();
});
client = createClient({
url: server.url,
retryAttempts: 0,
connectionParams: () => Promise.reject(new Error('No auth?')),
});
sub = tsubscribe(client, { query: '{ getValue }' });
await sub.waitForError((err) => {
const event = err as CloseEvent;
expect(event.code).toBe(4400);
expect(event.reason).toBe('No auth?');
expect(event.wasClean).toBeTruthy();
});
});
describe('query operation', () => {
it('should execute the query, "next" the result and then complete', async () => {
const { url } = await startTServer();
const client = createClient({ url });
const sub = tsubscribe(client, {
query: 'query { getValue }',
});
await sub.waitForNext((result) => {
expect(result).toEqual({ data: { getValue: 'value' } });
});
await sub.waitForComplete();
});
it('should accept nullish value for `operationName` and `variables`', async () => {
const { url } = await startTServer();
const client = createClient({ url });
// nothing
await tsubscribe(client, {
query: 'query { getValue }',
}).waitForComplete();
// undefined
await tsubscribe(client, {
operationName: undefined,
query: 'query { getValue }',
variables: undefined,
}).waitForComplete();
// null
await tsubscribe(client, {
operationName: null,
query: 'query { getValue }',
variables: null,
}).waitForComplete();
});
});
describe('subscription operation', () => {
it('should execute and "next" the emitted results until disposed', async () => {
const { url, ...server } = await startTServer();
const client = createClient({ url });
const sub = tsubscribe(client, {
query: 'subscription Ping { ping }',
});
await server.waitForOperation();
server.pong();
server.pong();
await sub.waitForNext((result) => {
expect(result).toEqual({ data: { ping: 'pong' } });
});
await sub.waitForNext((result) => {
expect(result).toEqual({ data: { ping: 'pong' } });
});
sub.dispose();
server.pong();
server.pong();
await sub.waitForNext(() => {
fail('Next shouldnt have been called');
}, 10);
await sub.waitForComplete();
});
it('should emit results to correct distinct sinks', async () => {
const { url, ...server } = await startTServer();
const client = createClient({ url });
const sub1 = tsubscribe(client, {
query: `subscription Ping($key: String!) {
ping(key: $key)
}`,
variables: { key: '1' },
});
await server.waitForOperation();
const sub2 = tsubscribe(client, {
query: `subscription Ping($key: String!) {
ping(key: $key)
}`,
variables: { key: '2' },
});
await server.waitForOperation();
server.pong('1');
await sub2.waitForNext(() => {
fail('Shouldnt have nexted');
}, 10);
await sub1.waitForNext((result) => {
expect(result).toEqual({
data: { ping: 'pong' },
});
});
server.pong('2');
await sub1.waitForNext(() => {
fail('Shouldnt have nexted');
}, 10);
await sub2.waitForNext((result) => {
expect(result).toEqual({
data: { ping: 'pong' },
});
});
const sub3 = tsubscribe(client, {
query: 'query { getValue }',
});
await server.waitForOperation();
await sub1.waitForNext(() => {
fail('Shouldnt have nexted');
}, 10);
await sub2.waitForNext(() => {
fail('Shouldnt have nexted');
}, 10);
await sub3.waitForNext((result) => {
expect(result).toEqual({ data: { getValue: 'value' } });
});
await sub3.waitForComplete();
});
it('should use the provided `generateID` for subscription IDs', async () => {
const { url, ...server } = await startTServer();
const generateIDFn = jest.fn(() => 'not unique');
const client = createClient({ url, generateID: generateIDFn });
tsubscribe(client, {
query: '{ getValue }',
});
await server.waitForOperation();
expect(generateIDFn).toBeCalled();
});
it('should dispose of the subscription on complete', async () => {
const { url, ...server } = await startTServer();
const client = createClient({ url });
const sub = tsubscribe(client, {
query: '{ getValue }',
});
await sub.waitForComplete();
await server.waitForClientClose();
expect(server.clients.size).toBe(0);
});
it('should dispose of the subscription on error', async () => {
const { url, ...server } = await startTServer();
const client = createClient({ url });
const sub = tsubscribe(client, {
query: '{ iDontExist }',
});
await sub.waitForError();
await server.waitForClientClose();
expect(server.clients.size).toBe(0);
});
it('should stop dispatching messages after completing a subscription', async () => {
const {
url,
server,
waitForOperation,
waitForComplete,
} = await startTServer();
const sub = tsubscribe(createClient({ url }), {
query: 'subscription { greetings }',
});
await waitForOperation();
for (const client of server.webSocketServer.clients) {
client.once('message', () => {
// no more messages from the client
fail("Shouldn't have dispatched a message");
});
}
await waitForComplete();
await sub.waitForComplete();
});
});
describe('"concurrency"', () => {
it('should dispatch and receive messages even if one subscriber disposes while another one subscribes', async () => {
const { url, ...server } = await startTServer();
const client = createClient({ url, retryAttempts: 0 });
const sub1 = tsubscribe(client, {
query: 'subscription { ping }',
});
await server.waitForOperation();
sub1.dispose();
const sub2 = tsubscribe(client, {
query: 'subscription { ping }',
});
await server.waitForOperation();
server.pong();
await sub2.waitForNext((result) => {
expect(result).toEqual({ data: { ping: 'pong' } });
});
await sub1.waitForNext(() => {
fail('Shouldnt have nexted');
}, 10);
await sub1.waitForComplete();
expect(server.clients.size).toBe(1);
});
});
describe('lazy', () => {
it('should connect immediately when mode is disabled', async () => {
const { url, ...server } = await startTServer();
createClient({
url,
lazy: false,
});
await server.waitForClient();
});
it('should close socket when disposing while mode is disabled', async () => {
const { url, ...server } = await startTServer();
// wait for connected
const client = await new Promise<Client>((resolve) => {
const client = createClient({
url,
lazy: false,
retryAttempts: 0,
on: {
connected: () => resolve(client),
},
});
});
client.dispose();
await server.waitForClientClose();
});
it('should connect on first subscribe when mode is enabled', async () => {
const { url, ...server } = await startTServer();
const client = createClient({
url,
lazy: true, // default
retryAttempts: 0,
});
await server.waitForClient(() => {
fail('Client shouldnt have appeared');
}, 10);
client.subscribe(
{
query: '{ getValue }',
},
{
next: noop,
error: noop,
complete: noop,
},
);
await server.waitForClient();
});
it('should disconnect on last unsubscribe when mode is enabled', async () => {
const { url, ...server } = await startTServer();
const client = createClient({
url,
lazy: true, // default
retryAttempts: 0,
});
await server.waitForClient(() => {
fail('Client shouldnt have appeared');
}, 10);
const sub1 = tsubscribe(client, {
operationName: 'PingPlease',
query: 'subscription PingPlease { ping }',
});
await server.waitForOperation();
const sub2 = tsubscribe(client, {
operationName: 'Pong',
query: 'subscription Pong($key: String!) { ping(key: $key) }',
variables: { key: '1' },
});
await server.waitForOperation();
sub1.dispose();
await sub1.waitForComplete();
// still is connected
await server.waitForClientClose(() => {
fail('Client should have closed');
}, 10);
// everyone unsubscribed
sub2.dispose();
await server.waitForClientClose();
});
it('should disconnect after the keepAlive has passed after last unsubscribe', async () => {
const { url, ...server } = await startTServer();
const client = createClient({
url,
lazy: true, // default
keepAlive: 20,
retryAttempts: 0,
});
const sub = tsubscribe(client, {
query: 'subscription { ping }',
});
await server.waitForOperation();
// still is connected
await server.waitForClientClose(() => {
fail("Client shouldn't have closed");
}, 10);
// everyone unsubscribed
sub.dispose();
// still connected because of the keepAlive
await server.waitForClientClose(() => {
fail("Client shouldn't have closed");
}, 10);
// but will close eventually
await server.waitForClientClose();
});
});
describe('reconnecting', () => {
it('should not reconnect if retry attempts is zero', async () => {
const { url, ...server } = await startTServer();
const sub = tsubscribe(
createClient({
url,
retryAttempts: 0,
retryTimeout: 5, // fake timeout
}),
{
query: 'subscription { ping }',
},
);
await server.waitForClient((client) => {
client.close();
});
await server.waitForClient(() => {
fail('Shouldnt have tried again');
}, 20);
// client reported the error
await sub.waitForError((err) => {
expect((err as CloseEvent).code).toBe(1005);
});
});
it('should reconnect silently after socket closes', async () => {
const { url, ...server } = await startTServer();
const sub = tsubscribe(
createClient({
url,
retryAttempts: 1,
retryTimeout: 5,
}),
{
query: 'subscription { ping }',
},
);
await server.waitForClient((client) => {
client.close();
});
// tried again
await server.waitForClient((client) => {
client.close();
});
// never again
await server.waitForClient(() => {
fail('Shouldnt have tried again');
}, 20);
// client reported the error
await sub.waitForError((err) => {
expect((err as CloseEvent).code).toBe(1005);
});
});
it('should report some close events immediately and not reconnect', async () => {
const { url, ...server } = await startTServer();
async function testCloseCode(code: number) {
const sub = tsubscribe(
createClient({
url,
retryAttempts: Infinity, // keep retrying forever
retryTimeout: 5,
}),
{
query: 'subscription { ping }',
},
);
await server.waitForClient((client) => {
client.close(code);
});
await server.waitForClient(() => {
fail('Shouldnt have tried again');
}, 20);
// client reported the error
await sub.waitForError((err) => {
expect((err as CloseEvent).code).toBe(code);
});
}
await testCloseCode(1002);
await testCloseCode(1011);
await testCloseCode(4400);
await testCloseCode(4401);
await testCloseCode(4409);
await testCloseCode(4429);
});
it.todo(
'should attempt reconnecting silently a few times before closing for good',
);
});
describe('events', () => {
it('should emit to relevant listeners with expected arguments', async () => {
const { url, ...server } = await startTServer();
const connectingFn = jest.fn(noop as EventListener<'connecting'>);
const connectedFn = jest.fn(noop as EventListener<'connected'>);
const closedFn = jest.fn(noop as EventListener<'closed'>);
// wait for connected
const client = await new Promise<Client>((resolve) => {
const client = createClient({
url,
retryAttempts: 0,
on: {
connecting: connectingFn,
connected: connectedFn,
closed: closedFn,
},
});
client.on('connecting', connectingFn);
client.on('connected', (...args) => {
connectedFn(...args);
resolve(client);
});
client.on('closed', closedFn);
// trigger connecting
tsubscribe(client, { query: 'subscription {ping}' });
});
expect(connectingFn).toBeCalledTimes(2);
expect(connectingFn.mock.calls[0].length).toBe(0);
expect(connectedFn).toBeCalledTimes(2); // initial and registered listener
connectedFn.mock.calls.forEach((cal) => {
expect(cal[0]).toBeInstanceOf(WebSocket);
});
expect(closedFn).not.toBeCalled();
server.clients.forEach((client) => {
client.close();
});
if (closedFn.mock.calls.length > 0) {
// already closed
} else {
// wait for close
await new Promise((resolve) => {
client.on('closed', () => resolve());
});
}
// retrying is disabled
expect(connectingFn).toBeCalledTimes(2);
expect(connectedFn).toBeCalledTimes(2);
expect(closedFn).toBeCalledTimes(2); // initial and registered listener
closedFn.mock.calls.forEach((cal) => {
// CloseEvent
expect(cal[0]).toHaveProperty('code');
expect(cal[0]).toHaveProperty('reason');
expect(cal[0]).toHaveProperty('wasClean');
});
});
});