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

        @Test
        @DisplayName("Should set cache map")
        void testSetCacheMap() {
            referralData.setCacheMap(cacheMap);
            // Verify by checking replaceCache doesn't throw
            referralData.setKey("test-key");
            referralData.replaceCache();

            concreteImplementation.setKey(key);
            assertEquals(key, concreteImplementation.getKey());
        }

        @Test
        @DisplayName("Should set cache map")
        void testSetCacheMap() {
            Map<String, DfsReferralDataInternal> cacheMap = new HashMap<>();

            // Test with mock
            doNothing().when(mockReferralData).setCacheMap(cacheMap);