add tests for useEventListener

packages/utils/__tests__/use-event-listener.test.tsx

@@ -0,0 +1,33 @@
+import * as React from "react";
+import { render, fireEvent, cleanup } from "@reach-internal/test/utils";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { useEventListener } from "@reach/utils";
+
+afterEach(cleanup);
+
+describe("useEventListener", () => {
+	const Test = ({ onBodyClick }: { onBodyClick: () => void }) => {
+		useEventListener("click", onBodyClick, document.body);
+		return null;
+	};
+
+	it("should call event listener when it's need", () => {
+		const handleBodyClick = vi.fn();
+		render(<Test onBodyClick={handleBodyClick} />);
+		fireEvent.click(document.body);
+		expect(handleBodyClick).toHaveBeenCalledTimes(1);
+		fireEvent.click(document.body);
+		expect(handleBodyClick).toHaveBeenCalledTimes(2);
+	});
+
+	it("should can change event listener from args", () => {
+		const handleBodyClick1 = vi.fn();
+		const handleBodyClick2 = vi.fn();
+		const { rerender } = render(<Test onBodyClick={handleBodyClick1} />);
+		fireEvent.click(document.body);
+		rerender(<Test onBodyClick={handleBodyClick2} />);
+		fireEvent.click(document.body);
+		expect(handleBodyClick1).toHaveBeenCalledOnce();
+		expect(handleBodyClick2).toHaveBeenCalledOnce();
+	});
+});