增加模拟数据

tests/unit/HelloWorld.spec.ts

@@ -3,7 +3,8 @@ import HelloWorld from "@/components/HelloWorld.vue";
 
 describe("HelloWorld.vue", () => {
   it("renders props.msg when passed", () => {
-    const msg = "new message";
+    const msg: string = "new message";
+    // tslint:disable-next-line:typedef
     const wrapper = shallowMount(HelloWorld, {
       propsData: { msg }
     });