"use strict"

var o = require("../../ospec/ospec")
var apiPubSub = require("../../api/pubsub")

o.spec("pubsub", function() {
	var pubsub
	o.beforeEach(function() {
		pubsub = apiPubSub()
	})

	o("shouldn't error if there are no renderers", function() {
		pubsub.publish()
	})

	o("should run a single renderer entry", function() {
		var spy = o.spy()

		pubsub.subscribe(spy)

		pubsub.publish()

		o(spy.callCount).equals(1)

		pubsub.publish()
		pubsub.publish()
		pubsub.publish()

		o(spy.callCount).equals(4)
	})

	o("should run all renderer entries", function() {
		var spy1 = o.spy()
		var spy2 = o.spy()
		var spy3 = o.spy()

		pubsub.subscribe(spy1)
		pubsub.subscribe(spy2)
		pubsub.subscribe(spy3)

		pubsub.publish()

		o(spy1.callCount).equals(1)
		o(spy2.callCount).equals(1)
		o(spy3.callCount).equals(1)

		pubsub.publish()

		o(spy1.callCount).equals(2)
		o(spy2.callCount).equals(2)
		o(spy3.callCount).equals(2)
	})

	o("should stop running after unsubscribe", function() {
		var spy = o.spy()

		pubsub.subscribe(spy)
		pubsub.unsubscribe(spy)

		pubsub.publish()

		o(spy.callCount).equals(0)
	})

	o("does nothing on invalid unsubscribe", function() {
		var spy = o.spy()

		pubsub.subscribe(spy)
		pubsub.unsubscribe(null)

		pubsub.publish()

		o(spy.callCount).equals(1)
	})
})