chore: add config

babel.config.js

+module.exports = {
+  env: {
+    test: {
+      presets: [['@babel/preset-env', { targets: { node: true } }]],
+      plugins: [
+        ['@vue/babel-plugin-jsx', { mergeProps: false }],
+        '@babel/plugin-proposal-optional-chaining',
+        '@babel/plugin-transform-object-assign',
+        '@babel/plugin-proposal-object-rest-spread',
+        '@babel/plugin-proposal-export-default-from',
+        '@babel/plugin-proposal-export-namespace-from',
+        '@babel/plugin-proposal-class-properties',
+        '@babel/plugin-syntax-dynamic-import',
+        '@babel/plugin-transform-runtime',
+        '@babel/plugin-transform-modules-commonjs',
+      ],
+    },
+  },
+};

tests/page-container.test.tsx

 import { mount } from '@vue/test-utils';
 import { PageContainer } from '../src/PageContainer';
 import { Tag, Button } from 'ant-design-vue';
-
-export const sleep = (timeout = 0) => new Promise(resolve => setTimeout(resolve, timeout));
+import { sleep } from './utils';
 
 describe('PageContainer', () => {
 

tests/utils.ts

+export const sleep = (timeout = 0) => new Promise(resolve => setTimeout(resolve, timeout));