Test title bar search trigger

Add focused interaction coverage for the new Slack-style global search entry point.

Generated-By: PostHog Code
Task-Id: 450712fc-39f6-49b8-a3e9-926069ec2760

Author: adamleithp

packages/ui/src/features/command/TitleBarSearch.test.tsx

@@ -0,0 +1,17 @@
+import { render, screen } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { describe, expect, it, vi } from "vitest";
+import { TitleBarSearch } from "./TitleBarSearch";
+
+describe("TitleBarSearch", () => {
+  it("opens global search when activated", async () => {
+    const onClick = vi.fn();
+    render(<TitleBarSearch onClick={onClick} />);
+
+    await userEvent.click(
+      screen.getByRole("button", { name: "Search PostHog Code" }),
+    );
+
+    expect(onClick).toHaveBeenCalledTimes(1);
+  });
+});