fix: make sure that the element can re-render

Author: briwa

packages/test-utils/src/wrapper.js

@@ -635,7 +635,7 @@ export default class Wrapper implements BaseWrapper {
 
     // If this element's method has been reset by setMethod, it won't trigger
     // Make sure that this element is updated with the latest method
-    if (this.vnode) {
+    if (this.vnode && this.vm && this.vm.$options.render) {
       const context = this.vnode.context
       context._update(context._render())
     }