Add more testing stuff

tests/example.spec.ts

@@ -0,0 +1,20 @@
+import { expect, test } from "@playwright/test";
+
+test("has title", async ({ page }) => {
+	await page.goto("https://playwright.dev/");
+
+	// Expect a title "to contain" a substring.
+	await expect(page).toHaveTitle(/Playwright/);
+});
+
+test("get started link", async ({ page }) => {
+	await page.goto("https://playwright.dev/");
+
+	// Click the get started link.
+	await page.getByRole("link", { name: "Get started" }).click();
+
+	// Expects page to have a heading with the name of Installation.
+	await expect(
+		page.getByRole("heading", { name: "Installation" }),
+	).toBeVisible();
+});