fix: add _compiled to functional so that it handles slot properly (#90)

Author: tran2

lib/process.js

@@ -69,6 +69,7 @@ module.exports = function (src, filePath, jestConfig) {
 
     if (parts.template.attrs.functional) {
       output += '__vue__options__.functional = true\n'
+      output += '__vue__options__._compiled = true\n'
     }
 
     if (map) {

test/FunctionalSFC.spec.js

@@ -25,4 +25,15 @@ describe('Processes .vue file with functional template', () => {
     // note: for new version of @vue/vue-utils we can use wrapper.isFunctionalComponent for this
     expect(wrapper.vm._vnode.fnOptions.functional).toBe(true)
   })
+
+  it('handles slot', () => {
+    wrapper = shallow(FunctionalSFC, {
+      context: {
+        props: { msg: { id: 1, title: '' }},
+        children: ['this is a slot']
+      }
+    })
+
+    expect(wrapper.text()).toBe('this is a slot')
+  })
 })

test/resources/FunctionalSFC.vue

@@ -1,3 +1,6 @@
 <template functional>
-    <button @click="props.onClick(props.msg.id)">{{props.msg.title}}</button>
+    <div @click="props.onClick(props.msg.id)">
+      {{props.msg.title}}
+      <slot></slot>
+    </div>
 </template>