// Then
        assertEquals(path, result);
        verify(mockReferralData).getPath();
    }

    @Test
    @DisplayName("Should get expiration")
    void testGetExpiration() {
        // Given
        long expiration = System.currentTimeMillis();
        when(mockReferralData.getExpiration()).thenReturn(expiration);

        // When

        // Call the method
        mockResponse.error();

        // Verify that the method was called
        verify(mockResponse, times(1)).error();
    }

    @Test
    void testGetExpiration() {
        Long expiration = 123456789L;
        when(mockResponse.getExpiration()).thenReturn(expiration);
        assertEquals(expiration, mockResponse.getExpiration());

        // Test null expiration