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View Code? Open in Web Editor NEWA tiny pub sub library that just subscribes and publishes
A tiny pub sub library that just subscribes and publishes
If a subscriber function disposes itself and is not the last subscriber in the array, a subscriber will be skipped. This occurs because the unsubscribe
method removes an element from the array on which forEach
is called. The following test case demonstrates the issue:
'unsubscribe while pushing'() {
const bus = transmitter()
const subscription = bus.subscribe(function () { subscription.dispose() })
const spy = sinon.spy()
bus.subscribe(spy)
bus.push(1);
assert(spy.calledOnce, 'spy should be called once.')
assert.equal(spy.callCount, 1, 'spy should be called exactly once.')
}
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