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test.js
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test.js
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const test = require('ava')
const listeners = new Map()
const target = {
dispatchEvent (event) {
if (listeners.has(event.type)) {
listeners.get(event.type).forEach(handle => handle(event))
}
},
addEventListener (type, handle, options) {
if (!listeners.has(type)) listeners.set(type, new Set())
listeners.get(type).add(handle)
},
removeEventListener (type, handle) {
if (listeners.has(type)) {
listeners.get(type).delete(handle)
if (!listeners.get(type).size) {
listeners.delete(type)
}
}
}
}
global.document = {
querySelector: () => target,
querySelectorAll: () => [target]
}
global.CustomEvent = class CustomEvent {
constructor (type, opts = {}) {
this.type = type
this.detail = opts.detail
}
}
const eventilator = require('./eventilator.js')
test('.on, .emit and handle.off works', t => {
const detail = 'see this?'
t.plan(2)
const handle = eventilator.on.event('div.fake-selector', e => {
t.true(e.detail === detail)
})
eventilator.emit(target, 'event', detail)
eventilator.emit(target, 'event', detail)
handle.off()
eventilator.emit(target, 'event', detail)
})
test('.once and handle.emit works', t => {
const detail = 'see this?'
t.plan(1)
const handle = eventilator.once.event(target, e => {
t.true(e.detail === detail)
})
handle.emit('event', detail)
handle.emit('event', detail)
})
test('object of event handlers work', t => {
t.plan(2)
eventilator.on(target, {
a () { t.pass() },
b () { t.pass() }
})
eventilator.emit(target, 'a')
eventilator.emit(target, 'a')
})