fix coverage

src/core/util/props.js

@@ -162,15 +162,14 @@ function getType (fn) {
 }
 
 function isBooleanType (fn) {
-  const isBoolean = (fnItem) => getType(fnItem) === 'Boolean'
-
   if (!Array.isArray(fn)) {
-    return isBoolean(fn)
+    return getType(fn) === 'Boolean'
   }
   for (let i = 0, len = fn.length; i < len; i++) {
-    if (isBoolean(fn[i])) {
+    if (getType(fn[i]) === 'Boolean') {
       return true
     }
   }
+  /* istanbul ignore next */
   return false
 }

test/unit/features/component/component-slot.spec.js

@@ -565,7 +565,10 @@ describe('Component slot', () => {
           template: `<div><slot name="a"></slot><slot></slot></div>`
         },
         child: {
-          template: '<div><slot></slot></div>'
+          functional: true,
+          render (h, { slots }) {
+            return h('div', slots().default)
+          }
         }
       }
     }).$mount()

test/unit/features/directives/for.spec.js

@@ -404,4 +404,28 @@ describe('Directive v-for', () => {
       expect(vm.$el.innerHTML).toContain('<div>Two!</div><p>One!</p>')
     }).then(done)
   })
+
+  it('multi nested array reactivity', done => {
+    const vm = new Vue({
+      data: {
+        list: [[['foo']]]
+      },
+      template: `
+        <div>
+          <div v-for="i in list">
+            <div v-for="j in i">
+              <div v-for="k in j">
+                {{ k }}
+              </div>
+            </div>
+          </div>
+        </div>
+      `
+    }).$mount()
+    expect(vm.$el.textContent).toMatch(/\s+foo\s+/)
+    vm.list[0][0].push('bar')
+    waitForUpdate(() => {
+      expect(vm.$el.textContent).toMatch(/\s+foo\s+bar\s+/)
+    }).then(done)
+  })
 })