减少不必要的代码

Former-commit-id: 8c704c1c9e29c1f8887eb3b899977b35b8a5e4bd

tests/unit/HelloWorld.spec.js

@@ -0,0 +1,14 @@
+// 暂时 D2 没有单元测试代码 此文件为自动生成
+
+import { shallowMount } from '@vue/test-utils'
+import HelloWorld from '@/components/HelloWorld.vue'
+
+describe('HelloWorld.vue', () => {
+  it('renders props.msg when passed', () => {
+    const msg = 'new message'
+    const wrapper = shallowMount(HelloWorld, {
+      propsData: { msg }
+    })
+    expect(wrapper.text()).toMatch(msg)
+  })
+})