fix test case in IE

Author: yyx990803

test/unit/modules/vdom/create-element.spec.js

@@ -170,12 +170,12 @@ describe('create-element', () => {
         return h('div', [[...list, input]])
       }
     }).$mount()
-    expect(vm.$el.innerHTML).toBe('<span>0</span><input value="a" type="text">')
+    expect(vm.$el.innerHTML).toContain('<span>0</span><input')
     const el = vm.$el.querySelector('input')
     el.value = 'b'
     vm.n++
     waitForUpdate(() => {
-      expect(vm.$el.innerHTML).toBe('<span>0</span><span>1</span><input value="a" type="text">')
+      expect(vm.$el.innerHTML).toContain('<span>0</span><span>1</span><input')
       expect(vm.$el.querySelector('input')).toBe(el)
       expect(vm.$el.querySelector('input').value).toBe('b')
     }).then(done)