tests: Convert tests to TypeScript.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

tests/index.ts

@@ -0,0 +1,23 @@
+import Fifo from "p-fifo";
+import type {Page} from "playwright-core";
+import test from "tape";
+
+import * as setup from "./setup.ts";
+
+test("app runs", async (t) => {
+  t.timeoutAfter(10e3);
+  setup.resetTestDataDirectory();
+  const app = await setup.createApp();
+  try {
+    const windows = new Fifo<Page>();
+    for (const win of app.windows()) void windows.push(win);
+    app.on("window", async (win) => windows.push(win));
+
+    const mainWindow = await windows.shift();
+    t.equal(await mainWindow.title(), "Zulip");
+
+    await mainWindow.waitForSelector("#connect");
+  } finally {
+    await setup.endTest(app);
+  }
+});