// Then
        assertEquals(server, result);
        verify(mockReferralData).getServer();
    }

    @Test
    @DisplayName("Should get domain")
    void testGetDomain() {
        // Given
        String domain = "TESTDOMAIN";
        when(mockReferralData.getDomain()).thenReturn(domain);

        // When
        String result = mockReferralData.getDomain();

        // Then