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42 lines
1.1 KiB
CoffeeScript
42 lines
1.1 KiB
CoffeeScript
$ = require 'jquery'
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describe 'jQuery extensions', ->
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describe '$.fn.preempt(eventName, handler)', ->
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[returnValue, element, events] = []
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beforeEach ->
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returnValue = undefined
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element = $("<div>")
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events = []
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element.on 'foo', -> events.push(1)
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element.preempt 'foo', ->
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events.push(2)
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returnValue
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element.on 'foo', -> events.push(3)
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it 'calls the preempting handler before all others', ->
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element.trigger 'foo'
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expect(events).toEqual [2,1,3]
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describe 'when handler returns false', ->
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it 'does not call subsequent handlers', ->
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returnValue = false
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element.trigger 'foo'
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expect(events).toEqual [2]
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describe 'when the event is namespaced', ->
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it 'calls handler', ->
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element.preempt 'foo.bar', -> events.push(4)
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element.trigger 'foo'
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expect(events).toEqual [4,2,1,3]
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events = []
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element.trigger 'foo.bar'
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expect(events).toEqual [4]
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events = []
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element.off('.bar')
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element.trigger 'foo'
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expect(events).toEqual [2,1,3]
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