message: fix prevent default unit test
diff: @@ -86,15 +86,14 @@ describe('Directive v-on', () => {
  vm = new Vue({
  el,
  template: `
  - <div @click="bar">
  - <div @click.stop="foo"></div>
  - </div>
  + <input type="checkbox" ref="input" @click.prevent="foo">
  `,
  - methods: { foo: spy, bar: spy2 }
  + methods: { foo: spy2 }
  })
  - triggerEvent(vm.$el.firstChild, 'click')
  - expect(spy).toHaveBeenCalled()
  - expect(spy2).not.toHaveBeenCalled()
  + vm.$refs.input.checked = false
  + triggerEvent(vm.$refs.input, 'click')
  + expect(spy2).toHaveBeenCalled()
  + expect(vm.$refs.input.checked).toBe(false)
  })
  it('should support capture', () => {
  