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webSocket-spec.ts
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webSocket-spec.ts
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import { expect } from 'chai';
import * as sinon from 'sinon';
import { webSocket } from 'rxjs/webSocket';
import { map, retry, take, repeat, takeWhile } from 'rxjs/operators';
declare const __root__: any;
/** @test {webSocket} */
describe('webSocket', () => {
let __ws: any;
function setupMockWebSocket() {
__ws = __root__.WebSocket;
__root__.WebSocket = MockWebSocket;
}
function teardownMockWebSocket() {
__root__.WebSocket = __ws;
MockWebSocket.clearSockets();
}
describe('basic behavior', () => {
beforeEach(() => {
setupMockWebSocket();
});
afterEach(() => {
teardownMockWebSocket();
});
it('should send and receive messages', () => {
let messageReceived = false;
const subject = webSocket<string>('ws://mysocket');
subject.next('ping');
subject.subscribe(x => {
expect(x).to.equal('pong');
messageReceived = true;
});
const socket = MockWebSocket.lastSocket;
expect(socket.url).to.equal('ws://mysocket');
socket.open();
expect(socket.lastMessageSent).to.equal(JSON.stringify('ping'));
socket.triggerMessage(JSON.stringify('pong'));
expect(messageReceived).to.be.true;
subject.unsubscribe();
});
it('should allow use of operators and subscribe', () => {
const subject = webSocket<string>('ws://mysocket');
const results: any[] = [];
subject.pipe(
map(x => x + '!'),
)
.subscribe(x => results.push(x));
MockWebSocket.lastSocket.triggerMessage(JSON.stringify('ngconf 2018 bug'));
expect(results).to.deep.equal(['ngconf 2018 bug!']);
});
it('receive multiple messages', () => {
const expected = ['what', 'do', 'you', 'do', 'with', 'a', 'drunken', 'sailor?'];
const results: string[] = [];
const subject = webSocket<string>('ws://mysocket');
subject.subscribe(x => {
results.push(x);
});
const socket = MockWebSocket.lastSocket;
socket.open();
expected.forEach(x => {
socket.triggerMessage(JSON.stringify(x));
});
expect(results).to.deep.equal(expected);
subject.unsubscribe();
});
it('should queue messages prior to subscription', () => {
const expected = ['make', 'him', 'walk', 'the', 'plank'];
const subject = webSocket<string>('ws://mysocket');
expected.forEach(x => {
subject.next(x);
});
let socket = MockWebSocket.lastSocket;
expect(socket).not.exist;
subject.subscribe();
socket = MockWebSocket.lastSocket;
expect(socket.sent.length).to.equal(0);
socket.open();
expect(socket.sent.length).to.equal(expected.length);
subject.unsubscribe();
});
it('should send messages immediately if already open', () => {
const subject = webSocket<string>('ws://mysocket');
subject.subscribe();
const socket = MockWebSocket.lastSocket;
socket.open();
subject.next('avast!');
expect(socket.lastMessageSent).to.equal(JSON.stringify('avast!'));
subject.next('ye swab!');
expect(socket.lastMessageSent).to.equal(JSON.stringify('ye swab!'));
subject.unsubscribe();
});
it('should close the socket when completed', () => {
const subject = webSocket<string>('ws://mysocket');
subject.subscribe();
const socket = MockWebSocket.lastSocket;
socket.open();
expect(socket.readyState).to.equal(1); // open
sinon.spy(socket, 'close');
expect(socket.close).not.have.been.called;
subject.complete();
expect(socket.close).have.been.called;
expect(socket.readyState).to.equal(3); // closed
subject.unsubscribe();
(<any>socket.close).restore();
});
it('should close the socket when unsubscribed before socket open', () => {
const subject = webSocket<string>('ws://mysocket');
subject.subscribe();
subject.unsubscribe();
const socket = MockWebSocket.lastSocket;
sinon.spy(socket, 'close');
socket.open();
expect(socket.close).have.been.called;
expect(socket.readyState).to.equal(3); // closed
(<any>socket.close).restore();
});
it('should close the socket when subscription is cancelled before socket open', () => {
const subject = webSocket<string>('ws://mysocket');
const subscription = subject.subscribe();
subscription.unsubscribe();
const socket = MockWebSocket.lastSocket;
sinon.spy(socket, 'close');
socket.open();
expect(socket.close).have.been.called;
expect(socket.readyState).to.equal(3); // closed
(<any>socket.close).restore();
});
it('should close the socket with a code and a reason when errored', () => {
const subject = webSocket<string>('ws://mysocket');
subject.subscribe();
const socket = MockWebSocket.lastSocket;
socket.open();
sinon.spy(socket, 'close');
expect(socket.close).not.have.been.called;
subject.error({ code: 1337, reason: 'Too bad, so sad :('});
expect(socket.close).have.been.calledWith(1337, 'Too bad, so sad :(');
subject.unsubscribe();
(<any>socket.close).restore();
});
it('should allow resubscription after closure via complete', () => {
const subject = webSocket<string>('ws://mysocket');
subject.subscribe();
const socket1 = MockWebSocket.lastSocket;
socket1.open();
subject.complete();
subject.next('a mariner yer not. yarrr.');
subject.subscribe();
const socket2 = MockWebSocket.lastSocket;
socket2.open();
expect(socket2).not.to.equal(socket1);
expect(socket2.lastMessageSent).to.equal(JSON.stringify('a mariner yer not. yarrr.'));
subject.unsubscribe();
});
it('should allow resubscription after closure via error', () => {
const subject = webSocket<string>('ws://mysocket');
subject.subscribe();
const socket1 = MockWebSocket.lastSocket;
socket1.open();
subject.error({ code: 1337 });
subject.next('yo-ho! yo-ho!');
subject.subscribe();
const socket2 = MockWebSocket.lastSocket;
socket2.open();
expect(socket2).not.to.equal(socket1);
expect(socket2.lastMessageSent).to.equal(JSON.stringify('yo-ho! yo-ho!'));
subject.unsubscribe();
});
it('should have a default resultSelector that parses message data as JSON', () => {
let result;
const expected = { mork: 'shazbot!' };
const subject = webSocket<string>('ws://mysocket');
subject.subscribe((x: any) => {
result = x;
});
const socket = MockWebSocket.lastSocket;
socket.open();
socket.triggerMessage(JSON.stringify(expected));
expect(result).to.deep.equal(expected);
subject.unsubscribe();
});
});
describe('with a config object', () => {
beforeEach(() => {
setupMockWebSocket();
});
afterEach(() => {
teardownMockWebSocket();
});
it('should send and receive messages', () => {
let messageReceived = false;
const subject = webSocket<string>({ url: 'ws://mysocket' });
subject.next('ping');
subject.subscribe(x => {
expect(x).to.equal('pong');
messageReceived = true;
});
const socket = MockWebSocket.lastSocket;
expect(socket.url).to.equal('ws://mysocket');
socket.open();
expect(socket.lastMessageSent).to.equal(JSON.stringify('ping'));
socket.triggerMessage(JSON.stringify('pong'));
expect(messageReceived).to.be.true;
subject.unsubscribe();
});
it('should take a protocol and set it properly on the web socket', () => {
const subject = webSocket<string>({
url: 'ws://mysocket',
protocol: 'someprotocol'
});
subject.subscribe();
const socket = MockWebSocket.lastSocket;
expect(socket.protocol).to.equal('someprotocol');
subject.unsubscribe();
});
it('should take a binaryType and set it properly on the web socket', () => {
const subject = webSocket<string>({
url: 'ws://mysocket',
binaryType: 'blob'
});
subject.subscribe();
const socket = MockWebSocket.lastSocket;
expect(socket.binaryType).to.equal('blob');
subject.unsubscribe();
});
it('should take a deserializer', () => {
const results = [] as string[];
const subject = webSocket<string>({
url: 'ws://mysocket',
deserializer: (e: any) => {
return e.data + '!';
}
});
subject.subscribe((x: any) => {
results.push(x);
});
const socket = MockWebSocket.lastSocket;
socket.open();
['ahoy', 'yarr', 'shove off'].forEach((x: any) => {
socket.triggerMessage(x);
});
expect(results).to.deep.equal(['ahoy!', 'yarr!', 'shove off!']);
subject.unsubscribe();
});
it('if the deserializer fails it should go down the error path', () => {
const subject = webSocket<string>({
url: 'ws://mysocket',
deserializer: (e: any) => {
throw new Error('I am a bad error');
}
});
subject.subscribe((x: any) => {
expect(x).to.equal('this should not happen');
}, (err: any) => {
expect(err).to.be.an('error', 'I am a bad error');
});
const socket = MockWebSocket.lastSocket;
socket.open();
socket.triggerMessage('weee!');
subject.unsubscribe();
});
it('should accept a closingObserver', () => {
let calls = 0;
const subject = webSocket<string>(<any>{
url: 'ws://mysocket',
closingObserver: {
next(x: any) {
calls++;
expect(x).to.be.an('undefined');
}
}
});
subject.subscribe();
let socket = MockWebSocket.lastSocket;
socket.open();
expect(calls).to.equal(0);
subject.complete();
expect(calls).to.equal(1);
subject.subscribe();
socket = MockWebSocket.lastSocket;
socket.open();
subject.error({ code: 1337 });
expect(calls).to.equal(2);
subject.unsubscribe();
});
it('should accept a closeObserver', () => {
const expected = [{ wasClean: true }, { wasClean: false }];
const closes = [] as any[];
const subject = webSocket<string>(<any>{
url: 'ws://mysocket',
closeObserver: {
next(e: any) {
closes.push(e);
}
}
});
subject.subscribe();
let socket = MockWebSocket.lastSocket;
socket.open();
expect(closes.length).to.equal(0);
socket.triggerClose(expected[0]);
expect(closes.length).to.equal(1);
subject.subscribe(null, function (err) {
expect(err).to.equal(expected[1]);
});
socket = MockWebSocket.lastSocket;
socket.open();
socket.triggerClose(expected[1]);
expect(closes.length).to.equal(2);
expect(closes[0]).to.equal(expected[0]);
expect(closes[1]).to.equal(expected[1]);
subject.unsubscribe();
});
it('should handle constructor errors', () => {
const subject = webSocket<string>(<any>{
url: 'bad_url',
WebSocketCtor: (url: string, protocol?: string | string[]): WebSocket => {
throw new Error(`connection refused`);
}
});
subject.subscribe((x: any) => {
expect(x).to.equal('this should not happen');
}, (err: any) => {
expect(err).to.be.an('error', 'connection refused');
});
subject.unsubscribe();
});
});
describe('multiplex', () => {
beforeEach(() => {
setupMockWebSocket();
});
afterEach(() => {
teardownMockWebSocket();
});
it('should be retryable', () => {
const results = [] as string[];
const subject = webSocket<{ name: string, value: string }>('ws://websocket');
const source = subject.multiplex(
() => ({ sub: 'foo' }),
() => ({ unsub: 'foo' }),
value => value.name === 'foo'
);
source.pipe(
retry(1),
map(x => x.value),
take(2),
).subscribe(x => {
results.push(x);
});
const socket = MockWebSocket.lastSocket;
socket.open();
expect(socket.lastMessageSent).to.deep.equal(JSON.stringify({ sub: 'foo' }));
socket.triggerClose({ wasClean: false }); // Bad connection
const socket2 = MockWebSocket.lastSocket;
expect(socket2).not.to.equal(socket);
socket2.open();
expect(socket2.lastMessageSent).to.deep.equal(JSON.stringify({ sub: 'foo' }));
socket2.triggerMessage(JSON.stringify({ name: 'foo', value: 'test' }));
socket2.triggerMessage(JSON.stringify({ name: 'foo', value: 'this' }));
expect(results).to.deep.equal(['test', 'this']);
});
it('should be repeatable', () => {
const results = [] as string[];
const subject = webSocket<{ name: string, value: string }>('ws://websocket');
const source = subject.multiplex(
() => ({ sub: 'foo' }),
() => ({ unsub: 'foo' }),
value => value.name === 'foo'
);
source
.pipe(
repeat(2),
map(x => x.value)
)
.subscribe(x => {
results.push(x);
});
const socket = MockWebSocket.lastSocket;
socket.open();
expect(socket.lastMessageSent).to.deep.equal(JSON.stringify({ sub: 'foo' }), 'first multiplexed sub');
socket.triggerMessage(JSON.stringify({ name: 'foo', value: 'test' }));
socket.triggerMessage(JSON.stringify({ name: 'foo', value: 'this' }));
socket.triggerClose({ wasClean: true });
const socket2 = MockWebSocket.lastSocket;
expect(socket2).not.to.equal(socket, 'a new socket was not created');
socket2.open();
expect(socket2.lastMessageSent).to.deep.equal(JSON.stringify({ sub: 'foo' }), 'second multiplexed sub');
socket2.triggerMessage(JSON.stringify({ name: 'foo', value: 'test' }));
socket2.triggerMessage(JSON.stringify({ name: 'foo', value: 'this' }));
socket2.triggerClose({ wasClean: true });
expect(results).to.deep.equal(['test', 'this', 'test', 'this'], 'results were not equal');
});
it('should multiplex over the webSocket', () => {
const results = [] as Array<{ value: number, name: string }>;
const subject = webSocket<{ value: number, name: string }>('ws://websocket');
const source = subject.multiplex(
() => ({ sub: 'foo'}),
() => ({ unsub: 'foo' }),
value => value.name === 'foo'
);
const sub = source.subscribe(function (x: any) {
results.push(x.value);
});
const socket = MockWebSocket.lastSocket;
socket.open();
expect(socket.lastMessageSent).to.deep.equal(JSON.stringify({ sub: 'foo' }));
[1, 2, 3, 4, 5].map((x: number) => {
return {
name: x % 3 === 0 ? 'bar' : 'foo',
value: x
};
}).forEach((x: any) => {
socket.triggerMessage(JSON.stringify(x));
});
expect(results).to.deep.equal([1, 2, 4, 5]);
sinon.spy(socket, 'close');
sub.unsubscribe();
expect(socket.lastMessageSent).to.deep.equal(JSON.stringify({ unsub: 'foo' }));
expect(socket.close).have.been.called;
(<any>socket.close).restore();
});
it('should keep the same socket for multiple multiplex subscriptions', () => {
const socketSubject = webSocket<string>({url: 'ws://mysocket'});
const results = [] as string[];
const socketMessages = [
{id: 'A'},
{id: 'B'},
{id: 'A'},
{id: 'B'},
{id: 'B'},
];
const sub1 = socketSubject.multiplex(
() => 'no-op',
() => results.push('A unsub'),
(req: any) => req.id === 'A'
).pipe(
takeWhile((req: any) => !req.complete)
)
.subscribe(
() => results.push('A next'),
(e) => results.push('A error ' + e),
() => results.push('A complete')
);
socketSubject.multiplex(
() => 'no-op',
() => results.push('B unsub'),
(req: any) => req.id === 'B')
.subscribe(
() => results.push('B next'),
(e) => results.push('B error ' + e),
() => results.push('B complete')
);
// Setup socket and send messages
let socket = MockWebSocket.lastSocket;
socket.open();
socketMessages.forEach((msg, i) => {
if (i === 1) {
sub1.unsubscribe();
expect((socketSubject as any)._socket).to.equal(socket);
}
socket.triggerMessage(JSON.stringify(msg));
});
socket.triggerClose({ wasClean: true });
expect(results).to.deep.equal([
'A next',
'A unsub',
'B next',
'B next',
'B next',
'B complete',
'B unsub',
]);
});
it('should not close the socket until all subscriptions complete', () => {
const socketSubject = webSocket<{ id: string, complete: boolean }>({url: 'ws://mysocket'});
const results = [] as string[];
const socketMessages = [
{id: 'A'},
{id: 'B'},
{id: 'A', complete: true},
{id: 'B'},
{id: 'B', complete: true},
];
socketSubject.multiplex(
() => 'no-op',
() => results.push('A unsub'),
req => req.id === 'A'
).pipe(
takeWhile(req => !req.complete)
).subscribe(
() => results.push('A next'),
(e) => results.push('A error ' + e),
() => results.push('A complete')
);
socketSubject.multiplex(
() => 'no-op',
() => results.push('B unsub'),
req => req.id === 'B'
).pipe(
takeWhile(req => !req.complete)
).subscribe(
() => results.push('B next'),
(e) => results.push('B error ' + e),
() => results.push('B complete')
);
// Setup socket and send messages
let socket = MockWebSocket.lastSocket;
socket.open();
socketMessages.forEach((msg) => {
socket.triggerMessage(JSON.stringify(msg));
});
expect(results).to.deep.equal([
'A next',
'B next',
'A complete',
'A unsub',
'B next',
'B complete',
'B unsub',
]);
});
});
describe('node constructor', () => {
it('should send and receive messages', () => {
let messageReceived = false;
const subject = webSocket<string>(<any>{
url: 'ws://mysocket',
WebSocketCtor: (url: string, protocol: string): MockWebSocket => {
return new MockWebSocket(url, protocol);
}
});
subject.next('ping');
subject.subscribe(x => {
expect(x).to.equal('pong');
messageReceived = true;
});
const socket = MockWebSocket.lastSocket;
expect(socket.url).to.equal('ws://mysocket');
socket.open();
expect(socket.lastMessageSent).to.equal(JSON.stringify('ping'));
socket.triggerMessage(JSON.stringify('pong'));
expect(messageReceived).to.be.true;
subject.unsubscribe();
});
it('should handle constructor errors if no WebSocketCtor', () => {
expect(() => {
const subject = webSocket<string>(<any>{
url: 'ws://mysocket'
});
}).to.throw('no WebSocket constructor can be found');
});
});
});
class MockWebSocket {
static sockets: Array<MockWebSocket> = [];
static get lastSocket(): MockWebSocket {
const socket = MockWebSocket.sockets;
const length = socket.length;
return length > 0 ? socket[length - 1] : undefined;
}
static clearSockets(): void {
MockWebSocket.sockets.length = 0;
}
sent: string[] = [];
handlers: any = {};
readyState: number = 0;
closeCode: any;
closeReason: any;
binaryType?: string;
constructor(public url: string, public protocol: string) {
MockWebSocket.sockets.push(this);
}
send(data: string): void {
this.sent.push(data);
}
get lastMessageSent(): string {
const sent = this.sent;
const length = sent.length;
return length > 0 ? sent[length - 1] : undefined;
}
triggerClose(e: any): void {
this.readyState = 3;
this.trigger('close', e);
}
triggerMessage(data: any): void {
const messageEvent = {
data: data,
origin: 'mockorigin',
ports: undefined as any,
source: __root__,
};
this.trigger('message', messageEvent);
}
open(): void {
this.readyState = 1;
this.trigger('open', {});
}
close(code: any, reason: any): void {
if (this.readyState < 2) {
this.readyState = 2;
this.closeCode = code;
this.closeReason = reason;
this.triggerClose({ wasClean: true });
}
}
trigger(name: string, e: any) {
if (this['on' + name]) {
this['on' + name](e);
}
const lookup = this.handlers[name];
if (lookup) {
for (let i = 0; i < lookup.length; i++) {
lookup[i](e);
}
}
}
}