Added some tests

src/client/components/privacyEnhancedModel/privacyEnhancedModel.test.tsx

@@ -0,0 +1,20 @@
+import { render, screen } from '@testing-library/react';
+import React from 'react';
+import PrivacyEnhancedModel from './privacyEnhancedModel';
+
+describe('privacy enhanced model', () => {
+  it('should provide link to model', () => {
+    const linkToModel = 'https://link/to/model';
+
+    render(<PrivacyEnhancedModel modelRef={linkToModel} />);
+
+    screen.getByText(linkToModel);
+    screen.getByRole('link');
+  });
+
+  it('should not provide link to model if there is no modelRef', () => {
+    render(<PrivacyEnhancedModel modelRef={undefined} />);
+
+    expect(screen.queryByRole('link')).toBeNull();
+  });
+});