Added tests for card description.

Author: dlabaj

packages/react-core/src/components/Card/__tests__/CardDescription.test.tsx

@@ -0,0 +1,21 @@
+import { render, screen } from '@testing-library/react';
+import { CardDescription } from '../CardDescription';
+
+describe('CardDescription', () => {
+  test('renders with PatternFly Core styles', () => {
+    const { asFragment } = render(<CardDescription>text</CardDescription>);
+    expect(asFragment()).toMatchSnapshot();
+  });
+
+  test('className is added to the root element', () => {
+    render(<CardDescription className="extra-class">text</CardDescription>);
+    expect(screen.getByText('text')).toHaveClass('extra-class');
+  });
+
+  test('extra props are spread to the root element', () => {
+    const testId = 'card-description';
+
+    render(<CardDescription data-testid={testId} />);
+    expect(screen.getByTestId(testId)).toBeInTheDocument();
+  });
+});