| 1 | import { SocketIoChannel } from '../../src/channel';
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| 2 |
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| 3 | describe('SocketIoChannel', () => {
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| 4 | let channel;
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| 5 | let socket;
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| 6 |
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| 7 | beforeEach(() => {
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| 8 | const channelName = 'some.channel';
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| 9 | let listeners = [];
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| 10 | socket = {
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| 11 | emit: (event, data) => listeners.filter(([e]) => e === event).forEach(([, fn]) => fn(channelName, data)),
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| 12 | on: (event, fn) => listeners.push([event, fn]),
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| 13 | removeListener: (event, fn) => {
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| 14 | listeners = listeners.filter(([e, f]) => (!fn ? e !== event : e !== event || f !== fn));
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| 15 | },
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| 16 | };
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| 17 |
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| 18 | channel = new SocketIoChannel(socket, channelName, {
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| 19 | namespace: false,
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| 20 | });
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| 21 | });
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| 22 |
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| 23 | test('triggers all listeners for an event', () => {
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| 24 | const l1 = jest.fn();
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| 25 | const l2 = jest.fn();
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| 26 | const l3 = jest.fn();
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| 27 | channel.listen('MyEvent', l1);
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| 28 | channel.listen('MyEvent', l2);
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| 29 | channel.listen('MyOtherEvent', l3);
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| 30 |
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| 31 | socket.emit('MyEvent', {});
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| 32 |
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| 33 | expect(l1).toBeCalled();
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| 34 | expect(l2).toBeCalled();
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| 35 | expect(l3).not.toBeCalled();
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| 36 |
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| 37 | socket.emit('MyOtherEvent', {});
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| 38 |
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| 39 | expect(l3).toBeCalled();
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| 40 | });
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| 41 |
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| 42 | test('can remove a listener for an event', () => {
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| 43 | const l1 = jest.fn();
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| 44 | const l2 = jest.fn();
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| 45 | const l3 = jest.fn();
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| 46 | channel.listen('MyEvent', l1);
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| 47 | channel.listen('MyEvent', l2);
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| 48 | channel.listen('MyOtherEvent', l3);
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| 49 |
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| 50 | channel.stopListening('MyEvent', l1);
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| 51 |
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| 52 | socket.emit('MyEvent', {});
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| 53 |
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| 54 | expect(l1).not.toBeCalled();
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| 55 | expect(l2).toBeCalled();
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| 56 | expect(l3).not.toBeCalled();
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| 57 |
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| 58 | socket.emit('MyOtherEvent', {});
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| 59 |
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| 60 | expect(l3).toBeCalled();
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| 61 | });
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| 62 |
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| 63 | test('can remove all listeners for an event', () => {
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| 64 | const l1 = jest.fn();
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| 65 | const l2 = jest.fn();
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| 66 | const l3 = jest.fn();
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| 67 | channel.listen('MyEvent', l1);
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| 68 | channel.listen('MyEvent', l2);
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| 69 | channel.listen('MyOtherEvent', l3);
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| 70 |
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| 71 | channel.stopListening('MyEvent');
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| 72 |
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| 73 | socket.emit('MyEvent', {});
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| 74 |
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| 75 | expect(l1).not.toBeCalled();
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| 76 | expect(l2).not.toBeCalled();
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| 77 | expect(l3).not.toBeCalled();
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| 78 |
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| 79 | socket.emit('MyOtherEvent', {});
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| 80 |
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| 81 | expect(l3).toBeCalled();
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| 82 | });
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| 83 | });
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