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methods-events.spec.js
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methods-events.spec.js
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import Vue from 'vue'
describe('Instance methods events', () => {
let vm, spy
beforeEach(() => {
vm = new Vue()
spy = jasmine.createSpy('emitter')
})
it('$on', () => {
vm.$on('test', function () {
// expect correct context
expect(this).toBe(vm)
spy.apply(this, arguments)
})
vm.$emit('test', 1, 2, 3, 4)
expect(spy.calls.count()).toBe(1)
expect(spy).toHaveBeenCalledWith(1, 2, 3, 4)
})
it('$on multi event', () => {
vm.$on(['test1', 'test2'], function () {
expect(this).toBe(vm)
spy.apply(this, arguments)
})
vm.$emit('test1', 1, 2, 3, 4)
expect(spy.calls.count()).toBe(1)
expect(spy).toHaveBeenCalledWith(1, 2, 3, 4)
vm.$emit('test2', 5, 6, 7, 8)
expect(spy.calls.count()).toBe(2)
expect(spy).toHaveBeenCalledWith(5, 6, 7, 8)
})
it('$off multi event', () => {
vm.$on(['test1', 'test2', 'test3'], spy)
vm.$off(['test1', 'test2'], spy)
vm.$emit('test1')
vm.$emit('test2')
expect(spy).not.toHaveBeenCalled()
vm.$emit('test3', 1, 2, 3, 4)
expect(spy.calls.count()).toBe(1)
})
it('$off multi event without callback', () => {
vm.$on(['test1', 'test2'], spy)
vm.$off(['test1', 'test2'])
vm.$emit('test1')
expect(spy).not.toHaveBeenCalled()
})
it('$once', () => {
vm.$once('test', spy)
vm.$emit('test', 1, 2, 3)
vm.$emit('test', 2, 3, 4)
expect(spy.calls.count()).toBe(1)
expect(spy).toHaveBeenCalledWith(1, 2, 3)
})
it('$off', () => {
vm.$on('test1', spy)
vm.$on('test2', spy)
vm.$off()
vm.$emit('test1')
vm.$emit('test2')
expect(spy).not.toHaveBeenCalled()
})
it('$off event', () => {
vm.$on('test1', spy)
vm.$on('test2', spy)
vm.$off('test1')
vm.$off('test1') // test off something that's already off
vm.$emit('test1', 1)
vm.$emit('test2', 2)
expect(spy.calls.count()).toBe(1)
expect(spy).toHaveBeenCalledWith(2)
})
it('$off event + fn', () => {
var spy2 = jasmine.createSpy('emitter')
vm.$on('test', spy)
vm.$on('test', spy2)
vm.$off('test', spy)
vm.$emit('test', 1, 2, 3)
expect(spy).not.toHaveBeenCalled()
expect(spy2.calls.count()).toBe(1)
expect(spy2).toHaveBeenCalledWith(1, 2, 3)
})
})