types: test cases typing

src/collapse/index.tsx

@@ -19,7 +19,7 @@ export default createComponent({
       type: [String, Number, Array] as PropType<
         string | number | Array<string | number>
       >,
-      required: true,
+      default: '',
     },
     border: {
       type: Boolean,

src/collapse/test/index.spec.tsx

@@ -1,9 +1,9 @@
-import { ref } from 'vue';
+import { defineComponent, ref } from 'vue';
 import Collapse from '..';
 import CollapseItem from '../../collapse-item';
 import { later, mount } from '../../../test';
 
-const Component = {
+const Component = defineComponent({
   props: {
     accordion: Boolean,
     border: {
@@ -31,7 +31,7 @@ const Component = {
       </Collapse>
     );
   },
-};
+});
 
 test('should update active value when title is clicked', async () => {
   const wrapper = mount(Component);