init

tests/unit/.eslintrc.js

@@ -0,0 +1,8 @@
+module.exports = {
+  env: {
+    jest: true
+  },
+  rules: {
+    'import/no-extraneous-dependencies': 'off'
+  }
+}

tests/unit/HelloWorld.spec.ts

@@ -0,0 +1,12 @@
+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);
+  });
+});