Add tests for DropdownMenu component

client/components/Dropdown/DropdownMenu.test.tsx

@@ -0,0 +1,55 @@
+import React from 'react';
+import { render, screen, fireEvent, waitFor } from '../../test-utils';
+import { DropdownMenu, DropdownMenuAlignment } from './DropdownMenu';
+
+describe('DropdownMenu', () => {
+  const renderDropdown = () => {
+    render(
+      <DropdownMenu
+        aria-label="More options"
+        align={DropdownMenuAlignment.RIGHT}
+      >
+        <li role="menuitem">Item One</li>
+        <li role="menuitem">Item Two</li>
+        <li role="menuitem">Item Three</li>
+      </DropdownMenu>
+    );
+  };
+
+  it('should render the dropdown button', () => {
+    renderDropdown();
+
+    const button = screen.getByRole('button', { name: 'More options' });
+    expect(button).toBeInTheDocument();
+
+    expect(screen.queryByRole('menu')).not.toBeInTheDocument();
+  });
+
+  it('should open dropdown and render menu items when button is clicked', () => {
+    renderDropdown();
+
+    const button = screen.getByRole('button', { name: 'More options' });
+
+    fireEvent.click(button);
+
+    expect(screen.getByRole('menu')).toBeInTheDocument();
+
+    expect(screen.getByText('Item One')).toBeInTheDocument();
+    expect(screen.getByText('Item Two')).toBeInTheDocument();
+    expect(screen.getByText('Item Three')).toBeInTheDocument();
+  });
+
+  it('should close the menu after selecting an item', async () => {
+    renderDropdown();
+
+    const button = screen.getByRole('button', { name: 'More options' });
+    fireEvent.click(button);
+
+    const item = screen.getByText('Item One');
+    fireEvent.mouseUp(item);
+
+    await waitFor(() => {
+      expect(screen.queryByRole('menu')).not.toBeInTheDocument();
+    });
+  });
+});