Add a simple test for useDownload hook

Combine Download with useDownload in a simple test.

src/web/components/form/__tests__/useDownload.jsx

@@ -0,0 +1,40 @@
+/* SPDX-FileCopyrightText: 2024 Greenbone AG
+ *
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+/* eslint-disable react/prop-types */
+
+import {describe, test, expect, testing} from '@gsa/testing';
+
+import {fireEvent, render, screen} from 'web/utils/testing';
+
+import useDownload from '../useDownload';
+import Download from '../download';
+
+const TestComponent = () => {
+  const [ref, download] = useDownload();
+  return (
+    <>
+      <Download ref={ref} />
+      <button
+        data-testid="download"
+        onClick={() => download({filename: 'foo', data: 'bar'})}
+      />
+    </>
+  );
+};
+
+describe('useDownload', () => {
+  test('should download a file', () => {
+    const createObjectURL = testing.fn().mockReturnValue('foo://bar');
+    window.URL.createObjectURL = createObjectURL;
+    window.URL.revokeObjectURL = testing.fn();
+
+    render(<TestComponent />);
+
+    fireEvent.click(screen.getByTestId('download'));
+
+    expect(createObjectURL).toHaveBeenCalled();
+  });
+});