Implement testing library (#2)

Co-authored-by: Eric NGUYEN <enguyen@techform.fr>
Reviewed-on: https://git.siklos-chaneru.duckdns.org/Siklos/svg-layout-designer-react/pulls/2

src/Components/Sidebar/Sidebar.test.tsx

@@ -0,0 +1,19 @@
+import * as React from 'react';
+import { describe, test, expect } from 'vitest';
+import { render, screen } from '../../utils/test-utils';
+import Sidebar from './Sidebar';
+
+describe('Sidebar test', () => {
+  test('Start empty', () => {
+    render(
+      <Sidebar
+        componentOptions={[]}
+        isOpen={true}
+        onClick={() => {}}
+        buttonOnClick={() => {}}
+      />
+    );
+
+    expect(screen.getByText(/Components/i)).toBeDefined();
+  });
+});