add test

src/lib/components/Header.test.js

@@ -0,0 +1,10 @@
+import { test, expect } from "vitest";
+import { render } from "@testing-library/svelte";
+
+import App from "./Header.svelte";
+
+test("reset ship link is present", () => {
+  const { queryByText } = render(App);
+
+  expect(queryByText("reset ship")).toBeTruthy();
+});