Fix asserting errors in async lifecycle hooks

src/__tests__/cleanup-throw.js

@@ -0,0 +1,21 @@
+import {render, cleanup} from '@testing-library/vue'
+import Vue from 'vue'
+
+test('cleanup re-throws errors from async lifecycle hooks', async () => {
+  const err = new Error('foo')
+  render({
+    async mounted() {
+      await new Promise((resolve, reject) => reject(err))
+    },
+    template: `<h1>Hello World</h1>`,
+  })
+  // thrown errors are logged redundantly by vue-test-utils injected Vue.config.errorHandler
+  // mute console
+  const spy = jest.spyOn(console, 'error').mockImplementation(() => {})
+
+  await Vue.nextTick()
+  expect(cleanup).toThrow(err)
+
+  // unmute console
+  spy.mockReset()
+})

src/vue-testing-library.js

@@ -97,9 +97,11 @@ function cleanupAtWrapper(wrapper) {
     document.body.removeChild(wrapper.element.parentNode)
   }
 
-  wrapper.destroy()
-
-  mountedWrappers.delete(wrapper)
+  try {
+    wrapper.destroy()
+  } finally {
+    mountedWrappers.delete(wrapper)
+  }
 }
 
 // Vue Testing Library's version of fireEvent will call DOM Testing Library's