Copy Link button implemented

frontend/tests/ResultsDisplay.test.tsx

@@ -1,11 +1,51 @@
 import React from 'react';
-import { render, screen } from '@testing-library/react';
+import { render, screen, fireEvent, waitFor } from '@testing-library/react';
+import '@testing-library/jest-dom';
 import ResultsDisplay from '../src/components/ResultsDisplay';
+import { Decision } from '../src/hooks/useSession';
+
+// Mock the Clipboard API
+Object.defineProperty(navigator, 'clipboard', {
+  value: {
+    writeText: jest.fn(),
+  },
+  writable: true,
+});
 
 describe('ResultsDisplay responsiveness and touch functionality', () => {
+  const mockDecision: Decision = {
+    goTo: 'Go-to decision',
+    alsoGood: 'Also good decision',
+    considerable: 'Considerable decision',
+    needsDiscussion: 'Needs discussion decision',
+    noGoes: 'No-goes decision',
+  };
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
   it('renders without crashing', () => {
-    render(<ResultsDisplay />);
-    // Add assertions specific to ResultsDisplay
+    render(<ResultsDisplay decision={mockDecision} />);
+    expect(screen.getByText('Cooperative Decision')).toBeInTheDocument();
+  });
+
+  it('should display the Copy Link button', () => {
+    render(<ResultsDisplay decision={mockDecision} />);
+    expect(screen.getByRole('button', { name: /copy link/i })).toBeInTheDocument();
+    expect(screen.getByTestId('ContentCopyIcon')).toBeInTheDocument();
+  });
+
+  it('should copy the session URL to clipboard when Copy Link button is clicked', async () => {
+    render(<ResultsDisplay decision={mockDecision} />);
+    const copyButton = screen.getByRole('button', { name: /copy link/i });
+    fireEvent.click(copyButton);
+
+    await waitFor(() => {
+      expect(navigator.clipboard.writeText).toHaveBeenCalledTimes(1);
+      expect(navigator.clipboard.writeText).toHaveBeenCalledWith(window.location.href);
+      expect(screen.getByRole('button', { name: /copied!/i })).toBeInTheDocument();
+    });
   });
 
   // Placeholder for responsive tests