refactor: adjust vuejs#7941 for slots unification

Author: yyx990803

src/core/vdom/create-functional-component.js

@@ -48,10 +48,16 @@ export function FunctionalRenderContext (
   this.children = children
   this.parent = parent
   this.listeners = data.on || emptyObject
-  this.scopedSlots = data.scopedSlots || emptyObject
   this.injections = resolveInject(options.inject, parent)
   this.slots = () => resolveSlots(children, parent)
 
+  Object.defineProperty(this, 'scopedSlots', {
+    enumerable: true,
+    get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  })
+
   // support for compiled functional template
   if (isCompiled) {
     // exposing $options for renderStatic()

src/core/vdom/helpers/normalize-scoped-slots.js

@@ -21,6 +21,7 @@ export function normalizeScopedSlots (
     }
     res._normalized = true
   }
+  // expose normal slots on scopedSlots
   if (normalSlots !== emptyObject) {
     for (const key in normalSlots) {
       res[key] = () => normalSlots[key]

test/unit/features/options/functional.spec.js

@@ -79,21 +79,25 @@ describe('Options functional', () => {
     document.body.removeChild(vm.$el)
   })
 
-  it('should expose data.scopedSlots as scopedSlots', () => {
+  it('should expose scopedSlots on render context', () => {
     const vm = new Vue({
-      template: '<div><wrap><p slot-scope="a">{{ a }}</p></wrap></div>',
+      template: '<div><wrap>foo<p slot="p" slot-scope="a">{{ a }}</p></wrap></div>',
       components: {
         wrap: {
           functional: true,
-          render (h, { scopedSlots, data }) {
-            expect(data.scopedSlots).toBe(scopedSlots)
-            return data.scopedSlots.default('a')
+          render (h, { scopedSlots }) {
+            return [
+              // scoped
+              scopedSlots.p('a'),
+              // normal slot content should be exposed as well
+              scopedSlots.default()
+            ]
           }
         }
       }
     }).$mount()
 
-    expect(vm.$el.textContent).toBe('a')
+    expect(vm.$el.textContent).toBe('afoo')
   })
 
   it('should support returning more than one root node', () => {