vue/test/unit/specs/instance/events_spec.js

var Vue = require('../../../../src/vue')
var _ = require('../../../../src/util')

describe('Instance Events', function () {

  var spy, spy2
  beforeEach(function () {
    spy = jasmine.createSpy()
    spy2 = jasmine.createSpy()
    spyOn(_, 'warn')
  })

  describe('option events', function () {

    it('normal events', function () {
      var vm = new Vue({
        events: {
          test: spy,
          test2: [spy, spy]
        }
      })
      vm.$emit('test', 123)
      expect(spy).toHaveBeenCalledWith(123)
      vm.$emit('test2')
      expect(spy.calls.count()).toBe(3)
    })

    it('hook events', function () {
      new Vue({
        events: {
          'hook:created': spy
        }
      })
      expect(spy).toHaveBeenCalled()
    })

    it('method name strings', function () {
      var vm = new Vue({
        events: {
          test: 'doSomething',
          test2: 'doSomethingElse'
        },
        methods: {
          doSomething: spy
        }
      })
      vm.$emit('test', 123)
      expect(spy).toHaveBeenCalledWith(123)
      vm.$emit('test2')
      expect(hasWarned(_, 'Unknown method')).toBe(true)
    })

  })

  describe('option watchers', function () {

    it('normal', function (done) {
      var spyA = jasmine.createSpy()
      var spyB = jasmine.createSpy()
      var count = 0
      var a = {
        b: { c: 1 }
      }
      var vm = new Vue({
        watch: {
          'a.b.c': spyA,
          'b + c': spyB,
          a: {
            deep: true,
            immediate: true,
            handler: 'test'
          }
        },
        data: {
          a: a,
          b: 1,
          c: 2
        },
        methods: {
          test: function (val) {
            count++
            expect(val).toBe(a)
          }
        }
      })
      vm.a.b.c = 2
      vm.b = 3
      vm.c = 4
      expect(count).toBe(1)
      _.nextTick(function () {
        expect(spyA).toHaveBeenCalledWith(2, 1)
        expect(spyB).toHaveBeenCalledWith(7, 3)
        expect(count).toBe(2)
        done()
      })
    })

    it('method name strings', function (done) {
      var spy = jasmine.createSpy()
      var vm = new Vue({
        watch: {
          'a': 'test'
        },
        data: {
          a: 1
        },
        methods: {
          test: spy
        }
      })
      vm.a = 2
      _.nextTick(function () {
        expect(spy).toHaveBeenCalledWith(2, 1)
        done()
      })
    })

  })

  describe('hooks', function () {

    it('created', function () {
      var ctx
      var vm = new Vue({
        created: function () {
          // can't assert this === vm here
          // because the constructor hasn't returned yet
          ctx = this
          // should have observed data
          expect(this._data.__ob__).toBeTruthy()
          spy()
        }
      })
      expect(ctx).toBe(vm)
      expect(spy).toHaveBeenCalled()
    })

    it('beforeDestroy', function () {
      var vm = new Vue({
        beforeDestroy: function () {
          expect(this).toBe(vm)
          expect(this._isDestroyed).toBe(false)
          spy()
        }
      })
      vm.$destroy()
      expect(spy).toHaveBeenCalled()
    })

    it('destroyed', function () {
      var vm = new Vue({
        destroyed: function () {
          expect(this).toBe(vm)
          expect(this._isDestroyed).toBe(true)
          expect(this._data).toBeNull()
          spy()
        }
      })
      vm.$destroy()
      expect(spy).toHaveBeenCalled()
    })

    if (Vue.util.inBrowser) {

      it('beforeCompile', function () {
        var vm = new Vue({
          template: '{{a}}',
          data: { a: 1 },
          beforeCompile: function () {
            expect(this).toBe(vm)
            expect(this.$el).toBe(el)
            expect(this.$el.textContent).toBe('{{a}}')
            spy()
          }
        })
        var el = document.createElement('div')
        vm.$mount(el)
        expect(spy).toHaveBeenCalled()
      })

      it('compiled', function () {
        var vm = new Vue({
          template: '{{a}}',
          data: { a: 1 },
          compiled: function () {
            expect(this.$el).toBe(el)
            expect(this.$el.textContent).toBe('1')
            spy()
          }
        })
        var el = document.createElement('div')
        vm.$mount(el)
        expect(spy).toHaveBeenCalled()
      })

      it('ready', function () {
        var vm = new Vue({
          ready: spy
        })
        expect(spy).not.toHaveBeenCalled()
        var el = document.createElement('div')
        vm.$mount(el)
        expect(spy).not.toHaveBeenCalled()
        vm.$appendTo(document.body)
        expect(spy).toHaveBeenCalled()
        vm.$remove()
        // try mounting on something already in dom
        el = document.createElement('div')
        document.body.appendChild(el)
        vm = new Vue({
          el: el,
          ready: spy2
        })
        expect(spy2).toHaveBeenCalled()
        vm.$remove()
      })

      describe('attached/detached', function () {

        it('in DOM', function () {
          var el = document.createElement('div')
          var childEl = document.createElement('div')
          el.appendChild(childEl)
          document.body.appendChild(el)
          var parentVm = new Vue({
            el: el,
            attached: spy,
            detached: spy2
          })
          var childVm = parentVm.$addChild({
            el: childEl,
            attached: spy,
            detached: spy2
          })
          expect(spy.calls.count()).toBe(2)
          parentVm.$remove()
          expect(spy2.calls.count()).toBe(2)
          // child should be already detached
          // so the hook should not fire again
          childVm.$remove()
          expect(spy2.calls.count()).toBe(2)
        })

        it('create then attach', function () {
          var el = document.createElement('div')
          var childEl = document.createElement('div')
          el.appendChild(childEl)
          var parentVm = new Vue({
            el: el,
            attached: spy,
            detached: spy2
          })
          var childVm = parentVm.$addChild({
            el: childEl,
            attached: spy,
            detached: spy2
          })
          parentVm.$appendTo(document.body)
          expect(spy.calls.count()).toBe(2)
          // detach child first
          childVm.$remove()
          expect(spy2.calls.count()).toBe(1)
          // should only fire parent detach
          parentVm.$remove()
          expect(spy2.calls.count()).toBe(2)
        })

        it('should not fire on detached child', function () {
          var el = document.createElement('div')
          var childEl = document.createElement('div')
          var parentVm = new Vue({
            el: el,
            attached: spy
          })
          var childVm = parentVm.$addChild({
            el: childEl,
            attached: spy
          })
          parentVm.$appendTo(document.body)
          expect(spy.calls.count()).toBe(1)
          childVm.$appendTo(el)
          expect(spy.calls.count()).toBe(2)
        })

      })

    }

  })

})