Repository: vuejs/vue
Pull request: add create-element tests

ref: #2872 


Changed files:
filename: test/unit/modules/vdom/create-element.spec.js
patch: @@ -0,0 +1,166 @@
+import Vue from 'vue'
+import { renderState } from 'core/instance/render'
+import {
+  renderElement,
+  renderElementWithChildren,
+  renderText,
+  renderStatic
+} from 'core/vdom/create-element'
+import { emptyVNode } from 'core/vdom/vnode'
+import { bind } from 'shared/util'
+
+describe('create-element', () => {
+  afterEach(() => {
+    renderState.activeInstance = null
+  })
+
+  it('render vnode with basic reserved tag using renderElement', () => {
+    const vm = new Vue({
+      data: { msg: 'hello world' }
+    })
+    const _e = bind(renderElement, vm)
+    renderState.activeInstance = vm
+    const vnode = _e('p', {})
+    expect(vnode.tag).toBe('p')
+    expect(vnode.data).toEqual({})
+    expect(vnode.children).toBeUndefined()
+    expect(vnode.text).toBeUndefined()
+    expect(vnode.elm).toBeUndefined()
+    expect(vnode.ns).toBeUndefined()
+    expect(vnode.context).toEqual(vm)
+  })
+
+  it('render vnode with component using renderElement', () => {
+    const vm = new Vue({
+      data: { message: 'hello world' },
+      components: {
+        'my-component': {
+          props: ['msg']
+        }
+      }
+    })
+    const _e = bind(renderElement, vm)
+    renderState.activeInstance = vm
+    const vnode = _e('my-component', { props: { msg: vm.message }})
+    expect(vnode.tag).toMatch(/vue-component-[0-9]+/)
+    expect(vnode.componentOptions.propsData).toEqual({ msg: vm.message })
+    expect(vnode.children).toBeUndefined()
+    expect(vnode.text).toBeUndefined()
+    expect(vnode.elm).toBeUndefined()
+    expect(vnode.ns).toBeUndefined()
+    expect(vnode.context).toEqual(vm)
+  })
+
+  it('render vnode with custom tag using renderElement', () => {
+    const vm = new Vue({
+      data: { msg: 'hello world' }
+    })
+    const _e = bind(renderElement, vm)
+    const tag = 'custom-tag'
+    renderState.activeInstance = vm
+    const vnode = _e(tag, {})
+    expect(vnode.tag).toBe('custom-tag')
+    expect(vnode.data).toEqual({})
+    expect(vnode.children).toBeUndefined()
+    expect(vnode.text).toBeUndefined()
+    expect(vnode.elm).toBeUndefined()
+    expect(vnode.ns).toBeUndefined()
+    expect(vnode.context).toEqual(vm)
+    expect(vnode.componentOptions).toBeUndefined()
+    expect(`Unknown custom element: <${tag}> - did you`).toHaveBeenWarned()
+  })
+
+  it('render empty vnode with falsy tag using renderElement', () => {
+    const vm = new Vue({
+      data: { msg: 'hello world' }
+    })
+    const _e = bind(renderElement, vm)
+    renderState.activeInstance = vm
+    const vnode = _e(null, {})
+    expect(vnode).toEqual(emptyVNode)
+  })
+
+  it('render vnode with not string tag using renderElement', () => {
+    const vm = new Vue({
+      data: { msg: 'hello world' }
+    })
+    const _e = bind(renderElement, vm)
+    renderState.activeInstance = vm
+    const vnode = _e(Vue.extend({ // Component class
+      props: ['msg']
+    }), { props: { msg: vm.message }})
+    expect(vnode.tag).toMatch(/vue-component-[0-9]+/)
+    expect(vnode.componentOptions.propsData).toEqual({ msg: vm.message })
+    expect(vnode.children).toBeUndefined()
+    expect(vnode.text).toBeUndefined()
+    expect(vnode.elm).toBeUndefined()
+    expect(vnode.ns).toBeUndefined()
+    expect(vnode.context).toEqual(vm)
+  })
+
+  it('warn message that createElement cannot called when using renderElement', () => {
+    const vm = new Vue({
+      data: { msg: 'hello world' }
+    })
+    const _e = bind(renderElement, vm)
+    _e('p', {})
+    expect('createElement cannot be called outside of component').toHaveBeenWarned()
+  })
+
+  it('renderText', () => {
+    expect(renderText('hello')).toBe('hello')
+    expect(renderText()).toBe('')
+  })
+
+  it('renderStatic', done => {
+    const vm = new Vue({
+      template: '<p>hello world</p>'
+    }).$mount()
+    waitForUpdate(() => {
+      const _s = bind(renderStatic, vm)
+      const vnode = _s(0)
+      expect(vnode.tag).toBe('p')
+      expect(vnode.data).toBeUndefined()
+      expect(vnode.children[0].text).toBe('hello world')
+      expect(vnode.elm.outerHTML).toBe('<p>hello world</p>')
+      expect(vnode.ns).toBeUndefined()
+      expect(vnode.context).toEqual(vm)
+    }).then(done)
+  })
+
+  it('render vnode with renderElementWithChildren', () => {
+    const vm = new Vue({})
+    const _t = renderText
+    const _e = bind(renderElement, vm)
+    const _h = bind(renderElementWithChildren, vm)
+    renderState.activeInstance = vm
+    const parent = _e('p', {})
+    const children = [_e('br'), _t('hello world'), _e('br')]
+    const vnode = _h(parent, children)
+    expect(vnode.children[0].tag).toBe('br')
+    expect(vnode.children[1].text).toBe('hello world')
+    expect(vnode.children[2].tag).toBe('br')
+  })
+
+  it('warn message when use renderElementWithChildren for component', () => {
+    const vm = new Vue({
+      data: { message: 'hello world' },
+      components: {
+        'my-component': {
+          props: ['msg']
+        }
+      }
+    })
+    const _t = renderText
+    const _e = bind(renderElement, vm)
+    const _h = bind(renderElementWithChildren, vm)
+    renderState.activeInstance = vm
+    const parent = _e('my-component', { props: { msg: vm.message }})
+    const children = [_e('br'), _t('hello world'), _e('br')]
+    const vnode = _h(parent, children)
+    expect(vnode.componentOptions.children[0].tag).toBe('br')
+    expect(vnode.componentOptions.children[1]).toBe('hello world')
+    expect(vnode.componentOptions.children[2].tag).toBe('br')
+    expect('A component\'s children should be a function').toHaveBeenWarned()
+  })
+})