types: test cases typing

src/submit-bar/test/index.spec.ts

@@ -1,5 +1,5 @@
 import SubmitBar from '..';
-import { mount } from '@vue/test-utils';
+import { mount } from '../../../test';
 
 test('should emit submit event when submit button is clicked', () => {
   const wrapper = mount(SubmitBar);
@@ -78,9 +78,7 @@ test('should adjust text align when using text-align prop', () => {
       textAlign: 'left',
     },
   });
-  expect(wrapper.find('.van-submit-bar__text').element.style.textAlign).toEqual(
-    'left'
-  );
+  expect(wrapper.find('.van-submit-bar__text').style.textAlign).toEqual('left');
 });
 
 test('should allow to disable safe-area-inset-bottom prop', () => {