From 2d1d1e67c5dd0992338622adf90f2270b05f2192 Mon Sep 17 00:00:00 2001
From: cexbrayat <cedric@ninja-squad.com>
Date: Sat, 11 Feb 2023 16:27:25 +0100
Subject: [PATCH] repro: #1973

---
 src/mount.ts                                   |  4 +++-
 tests/components/DefinePropsAndDefineEmits.vue | 15 +++++++++++++++
 tests/mount.spec.ts                            | 12 ++++++++++++
 3 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 tests/components/DefinePropsAndDefineEmits.vue

diff --git a/src/mount.ts b/src/mount.ts
index f8206294fb..34b5e707eb 100644
--- a/src/mount.ts
+++ b/src/mount.ts
@@ -203,7 +203,9 @@ export function mount<
   >
 >
 // component declared by vue-tsc ScriptSetup
-export function mount<T extends DefineComponent<any, any, any, any, any>>(
+export function mount<
+  T extends DefineComponent<any, any, any, any, any, any, any, any, any>
+>(
   component: T,
   options?: ComponentMountingOptions<T>
 ): VueWrapper<InstanceType<T>>
diff --git a/tests/components/DefinePropsAndDefineEmits.vue b/tests/components/DefinePropsAndDefineEmits.vue
new file mode 100644
index 0000000000..93b1cf6ee1
--- /dev/null
+++ b/tests/components/DefinePropsAndDefineEmits.vue
@@ -0,0 +1,15 @@
+<template>
+  <div :class="placement">
+    <slot />
+  </div>
+</template>
+
+<script lang="ts" setup>
+defineProps<{
+  placement: 'start' | 'end' | 'top' | 'bottom';
+}>();
+
+defineEmits<{
+  (e: 'update', value: string): void;
+}>();
+</script>
diff --git a/tests/mount.spec.ts b/tests/mount.spec.ts
index 7c77d66c45..59044df754 100644
--- a/tests/mount.spec.ts
+++ b/tests/mount.spec.ts
@@ -1,6 +1,7 @@
 import { describe, expect, it, vi } from 'vitest'
 import { defineComponent } from 'vue'
 import { mount } from '../src'
+import DefinePropsAndDefineEmits from './components/DefinePropsAndDefineEmits.vue'
 import HelloFromVitestPlayground from './components/HelloFromVitestPlayground.vue'
 
 describe('mount: general tests', () => {
@@ -32,4 +33,15 @@ describe('mount: general tests', () => {
 
     expect(spy).not.toHaveBeenCalled()
   })
+
+  it('should not warn on readonly hasOwnProperty when mounting a component', () => {
+    const wrapper = mount(DefinePropsAndDefineEmits, {
+      props: {
+        placement: 'end'
+      },
+      slots: { default: 'Hello' }
+    })
+    expect(wrapper.get('div').text()).toContain('Hello')
+    expect(wrapper.get('div').classes()).toContain('end')
+  })
 })