}

    @Nested
    @DisplayName("Cache Management Tests")
    class CacheManagementTests {

        private Map<String, DfsReferralDataInternal> cacheMap;

        @BeforeEach
        void setUpCache() {
            cacheMap = new HashMap<>();
        }

        @Test
        @DisplayName("Should set cache map")
        void testSetCacheMap() {
            referralData.setCacheMap(cacheMap);

    }

    @Nested
    @DisplayName("Cache Operations Tests")
    class CacheOperationsTests {

        private Map<String, DfsReferralDataInternal> cacheMap;

        @BeforeEach
        void setupCache() {
            cacheMap = new HashMap<>();
        }

        @Test
        @DisplayName("Should replace entry in cache map")
        void testReplaceCacheWithMap() {
            String key = "test-key";