vue/test/unit/specs/api/lifecycle_spec.js

var Vue = require('src')
var compiler = require('src/compiler')

describe('Lifecycle API', function () {

  describe('$mount', function () {

    var el, frag
    beforeEach(function () {
      el = document.createElement('div')
      el.textContent = '{{test}}'
      frag = document.createDocumentFragment()
      frag.appendChild(el)
      spyWarns()
    })

    it('normal', function () {
      var vm = new Vue({
        data: {
          test: 'hi!'
        }
      })
      vm.$mount(el)
      expect(vm.$el).toBe(el)
      expect(el.__vue__).toBe(vm)
      expect(el.textContent).toBe('hi!')
    })

    it('auto-create', function () {
      var vm = new Vue({
        template: '{{a}}',
        data: {
          a: 123
        }
      })
      vm.$mount()
      expect(vm.$el).toBeTruthy()
      expect(vm.$el.tagName).toBe('DIV')
      expect(vm.$el.textContent).toBe('123')
    })

    it('selector', function () {
      el.id = 'mount-test'
      document.body.appendChild(el)
      var vm = new Vue({
        data: { test: 'hi!' }
      })
      vm.$mount('#mount-test')
      expect(vm.$el).toBe(el)
      expect(el.__vue__).toBe(vm)
      expect(el.textContent).toBe('hi!')
      document.body.removeChild(el)
    })

    it('warn invalid selector', function () {
      var vm = new Vue()
      vm.$mount('#none-exist')
      expect(hasWarned('Cannot find element')).toBe(true)
    })

    it('replace', function () {
      el.className = 'replace-test'
      document.body.appendChild(el)
      var vm = new Vue({
        replace: true,
        data: { test: 'hi!' },
        template: '<div>{{test}}</div>'
      })
      vm.$mount(el)
      expect(vm.$el).not.toBe(el)
      expect(vm.$el.textContent).toBe('hi!')
      expect(document.body.contains(el)).toBe(false)
      expect(document.body.lastChild).toBe(vm.$el)
      expect(vm.$el.className).toBe('replace-test')
      document.body.removeChild(vm.$el)
    })

    it('precompiled linker', function () {
      var linker = compiler.compile(el, Vue.options)
      var vm = new Vue({
        _linker: linker,
        data: {
          test: 'hi!'
        }
      })
      vm.$mount(el)
      expect(vm.$el).toBe(el)
      expect(el.__vue__).toBe(vm)
      expect(el.textContent).toBe('hi!')
    })

    it('mount to fragment', function () {
      var vm = new Vue({
        data: { test: 'frag' }
      })
      vm.$mount(frag)
      expect(vm._fragment).toBe(frag)
      expect(vm.$el.nextSibling.textContent).toBe('frag')
    })

    it('replace fragment', function () {
      document.body.appendChild(el)
      var vm = new Vue({
        replace: true,
        data: { test: 'hi!' },
        template: '<div>{{test}}</div><div>{{test + "!"}}</div>'
      })
      vm.$mount(el)
      expect(vm.$el).not.toBe(el)
      expect(vm.$el.nextSibling.textContent).toBe('hi!')
      expect(vm.$el.nextSibling.nextSibling.textContent).toBe('hi!!')
      expect(document.body.contains(el)).toBe(false)
      expect(document.body.lastChild).toBe(vm._fragmentEnd)
      vm.$remove()
    })

    it('hooks', function () {
      var hooks = ['created', 'beforeCompile', 'compiled', 'attached', 'ready']
      var options = {
        data: {
          test: 'hihi'
        }
      }
      hooks.forEach(function (hook) {
        options[hook] = jasmine.createSpy(hook)
      })
      var vm = new Vue(options)
      expect(options.created).toHaveBeenCalled()
      expect(options.beforeCompile).not.toHaveBeenCalled()
      vm.$mount(el)
      expect(options.beforeCompile).toHaveBeenCalled()
      expect(options.compiled).toHaveBeenCalled()
      expect(options.attached).not.toHaveBeenCalled()
      expect(options.ready).not.toHaveBeenCalled()
      vm.$appendTo(document.body)
      expect(options.attached).toHaveBeenCalled()
      expect(options.ready).toHaveBeenCalled()
      vm.$remove()
    })

    it('warn against multiple calls', function () {
      var vm = new Vue({
        el: el
      })
      vm.$mount(el)
      expect(hasWarned('$mount() should be called only once')).toBe(true)
    })

  })

  describe('$destroy', function () {

    it('normal', function () {
      var vm = new Vue()
      expect(vm._isDestroyed).toBe(false)
      var data = vm._data
      expect(data.__ob__.vms.length).toBe(1)
      vm.$destroy()
      expect(data.__ob__.vms.length).toBe(0)
      expect(vm._isDestroyed).toBe(true)
      expect(vm._watchers).toBeNull()
      expect(vm.$el).toBeNull()
      expect(vm.$parent).toBeNull()
      expect(vm.$root).toBeNull()
      expect(vm.$children).toBeNull()
      expect(vm._directives).toBeNull()
      expect(Object.keys(vm._events).length).toBe(0)
    })

    it('remove element', function () {
      var el = document.createElement('div')
      var parent = document.createElement('div')
      parent.appendChild(el)
      var vm = new Vue({ el: el })
      vm.$destroy(true)
      expect(parent.childNodes.length).toBe(0)
      expect(el.__vue__).toBeNull()
    })

    it('hooks', function () {
      var opts = {
        beforeDestroy: jasmine.createSpy(),
        destroyed: jasmine.createSpy(),
        detached: jasmine.createSpy()
      }
      var el = opts.el = document.createElement('div')
      document.body.appendChild(el)
      var vm = new Vue(opts)
      vm.$destroy(true)
      expect(opts.beforeDestroy).toHaveBeenCalled()
      expect(opts.destroyed).toHaveBeenCalled()
      expect(opts.detached).toHaveBeenCalled()
    })

    // #1966
    it('grandchild hooks', function () {
      var grandChildBeforeDestroy = jasmine.createSpy()
      var grandChildDestroyed = jasmine.createSpy()
      var grandChildDetached = jasmine.createSpy()

      var opts = {
        template: '<div><test></test></div>',
        components: {
          test: {
            template: '<div><test-inner></test-inner></div>',
            components: {
              'test-inner': {
                beforeDestroy: grandChildBeforeDestroy,
                destroyed: grandChildDestroyed,
                detached: grandChildDetached
              }
            }
          }
        }
      }
      var el = opts.el = document.createElement('div')
      document.body.appendChild(el)
      var vm = new Vue(opts)
      vm.$destroy(true)

      expect(grandChildBeforeDestroy).toHaveBeenCalled()
      expect(grandChildDestroyed).toHaveBeenCalled()
      expect(grandChildDetached).toHaveBeenCalled()
    })

    it('parent', function () {
      var parent = new Vue()
      var child = new Vue({ parent: parent })
      var child2 = new Vue({ parent: parent })
      expect(parent.$children.length).toBe(2)
      child.$destroy()
      expect(parent.$children.length).toBe(1)
      child2.$destroy()
      expect(parent.$children.length).toBe(0)
    })

    it('children', function () {
      var parent = new Vue()
      var child = new Vue({ parent: parent })
      parent.$destroy()
      expect(child._isDestroyed).toBe(true)
    })

    it('directives', function () {
      var spy = jasmine.createSpy('directive unbind')
      var vm = new Vue({
        el: document.createElement('div'),
        template: '<div v-test></div>',
        directives: {
          test: {
            unbind: spy
          }
        }
      })
      vm.$destroy()
      expect(spy).toHaveBeenCalled()
    })

    it('watchers', function () {
      var vm = new Vue({
        el: document.createElement('div'),
        template: '{{a}}',
        data: { a: 1 }
      })
      vm.$watch('a', function () {})
      var dirWatcher = vm._watchers[0]
      var userWatcher = vm._watchers[1]
      vm.$destroy()
      expect(dirWatcher.active).toBe(false)
      expect(userWatcher.active).toBe(false)
    })

    it('refuse multiple calls', function () {
      var spy = jasmine.createSpy()
      var vm = new Vue({
        beforeDestroy: spy
      })
      vm.$destroy()
      vm.$destroy()
      expect(spy.calls.count()).toBe(1)
    })

    it('safely teardown partial compilation', function () {
      var vm = new Vue({
        template: '<test><partial name="hello"></partial></test>',
        partials: {
          hello: 'Hello {{name}}'
        },
        components: {
          test: {
            template: '<slot></slot>'
          }
        }
      }).$mount()
      expect(function () {
        vm.$destroy()
      }).not.toThrow()
    })

  })

  describe('$compile', function () {

    it('should partial compile and teardown stuff', function (done) {
      var el = document.createElement('div')
      var vm = new Vue({
        el: el,
        template: '{{a}}',
        data: {
          a: 'hi'
        }
      })
      expect(vm._directives.length).toBe(1)
      var partial = document.createElement('span')
      partial.textContent = '{{a}}'
      var decompile = vm.$compile(partial)
      expect(partial.textContent).toBe('hi')
      expect(vm._directives.length).toBe(2)
      decompile()
      expect(vm._directives.length).toBe(1)
      vm.a = 'ha'
      Vue.nextTick(function () {
        expect(el.textContent).toBe('ha')
        expect(partial.textContent).toBe('hi')
        done()
      })
    })

  })

})