Align app contract test with result UI

Author: gildesmarais

frontend/src/__tests__/App.contract.test.tsx

@@ -64,18 +64,16 @@ describe('App contract', () => {
     fireEvent.click(screen.getByRole('button', { name: 'Generate feed URL' }));
 
     await waitFor(() => {
-      expect(screen.getByText('Your feed is ready')).toBeInTheDocument();
       expect(screen.getByText('Example Feed')).toBeInTheDocument();
       expect(screen.getByLabelText('Feed URL')).toBeInTheDocument();
       expect(screen.getByRole('button', { name: 'Copy feed URL' })).toBeInTheDocument();
       expect(screen.getByRole('link', { name: 'Open feed' })).toBeInTheDocument();
-      expect(screen.getByRole('link', { name: 'Open JSON Feed' })).toHaveAttribute(
+      expect(screen.getByRole('link', { name: 'JSON Feed' })).toHaveAttribute(
         'href',
         'http://localhost:3000/api/v1/feeds/generated-token.json'
       );
       expect(screen.getByRole('button', { name: 'Create another feed' })).toBeInTheDocument();
-      expect(screen.getByText('Preview')).toBeInTheDocument();
-      expect(screen.getByText('Latest items from this feed')).toBeInTheDocument();
+      expect(screen.getByText('Feed preview')).toBeInTheDocument();
       expect(screen.getByText('Contract Item')).toBeInTheDocument();
     });
   });