add unit tests

tests/components/SidebarNavItem.test.tsx

@@ -0,0 +1,55 @@
+import { UserCircleIcon } from '@heroicons/react/24/outline';
+import { fireEvent, screen } from '@testing-library/react';
+import { Route, Routes } from 'react-router-dom';
+import { describe, expect, it, vi } from 'vitest';
+import { SidebarNavItem } from '../../src/components/SidebarNavItem';
+import { renderWithRouter } from '../helpers/renderWithRouter';
+
+describe('SidebarNavItem', () => {
+    it('renders active style and collapsed label behavior', () => {
+        renderWithRouter(
+            <Routes>
+                <Route
+                    path="/users"
+                    element={<SidebarNavItem to="/users" label="Users" icon={UserCircleIcon} collapsed />}
+                />
+            </Routes>,
+            { route: '/users' },
+        );
+
+        const link = screen.getByRole('link', { name: 'Users' });
+        expect(link.className).toContain('ui-accent-active');
+        expect(link.className).toContain('mx-auto');
+        expect(screen.getByText('Users').className).toContain('lg:hidden');
+    });
+
+    it('renders inactive style and triggers onClick', () => {
+        const onClick = vi.fn();
+        renderWithRouter(
+            <Routes>
+                <Route path="/users" element={<div>Users page</div>} />
+                <Route
+                    path="/profile"
+                    element={
+                        <SidebarNavItem
+                            to="/users"
+                            label="Users"
+                            icon={UserCircleIcon}
+                            collapsed={false}
+                            onClick={onClick}
+                        />
+                    }
+                />
+            </Routes>,
+            { route: '/profile' },
+        );
+
+        const link = screen.getByRole('link', { name: 'Users' });
+        expect(link.className).toContain('hover:bg-zinc-500/15');
+        expect(link.className).toContain('lg:w-full');
+        expect(screen.getByText('Users').className).toContain('truncate');
+
+        fireEvent.click(link);
+        expect(onClick).toHaveBeenCalledTimes(1);
+    });
+});