// Test with mock
            doNothing().when(mockReferralData).setCacheMap(cacheMap);
            mockReferralData.setCacheMap(cacheMap);
            verify(mockReferralData, times(1)).setCacheMap(cacheMap);

            // Test with concrete implementation
            assertDoesNotThrow(() -> concreteImplementation.setCacheMap(cacheMap));
        }

        @Test
        @DisplayName("Should replace cache")

        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();
            assertEquals(referralData, cacheMap.get("test-key"));

     *            cache key
     */
    void setKey(String key);

    /**
     * Set the cache map for this referral
     *
     * @param map the cache map to associate with this referral
     */
    void setCacheMap(Map<String, DfsReferralDataInternal> map);

    /**
     * Replaces the entry with key in the cache map with this referral
     */
    void replaceCache();

    /**

     */
    public int getFlags() {
        return this.rflags;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.dfs.DfsReferralDataInternal#setCacheMap(java.util.Map)
     */
    @Override
    public void setCacheMap(final Map<String, DfsReferralDataInternal> map) {
        this.map = map;
    }

    /**
     * {@inheritDoc}
     *

                 * the dr that was successful so that subsequent
                 * attempts to resolve DFS use the last successful
                 * referral first.
                 */
                tmp.setCacheMap(links.map);
                tmp.setKey("\\");
                tmp = tmp.next();
            } while (tmp != dr);

            if (log.isDebugEnabled()) {
                log.debug("Have referral " + dr);