fix: allow unmounting with no wrapper element (#312)

* fix: check wrapper element to fix #311

Author: hcg1023

src/__tests__/render.js

@@ -1,4 +1,5 @@
-import {render} from '..'
+import {render, cleanup} from '..'
+import {h, defineComponent} from 'vue'
 import '@testing-library/jest-dom'
 
 test('baseElement defaults to document.body', () => {
@@ -87,3 +88,15 @@ test('unmounts', () => {
 
   expect(queryByTestId('node')).not.toBeInTheDocument()
 })
+
+test('unmounts when no wrapper element is present', () => {
+  const Comp = defineComponent((_, ctx) => () => ctx.slots.default?.())
+
+  const {unmount} = render({
+    render: () => h(Comp, () => h('div')),
+  })
+
+  unmount()
+
+  expect(() => cleanup()).not.toThrow()
+})

src/render.js

@@ -60,10 +60,7 @@ function cleanup() {
 }
 
 function cleanupAtWrapper(wrapper) {
-  if (
-    wrapper.element.parentNode &&
-    wrapper.element.parentNode.parentNode === document.body
-  ) {
+  if (wrapper.element?.parentNode?.parentNode === document.body) {
     document.body.removeChild(wrapper.element.parentNode)
   }