* For example, the cache may evict an entry because it hasn't been used recently or very often.
   *
   * <p>If {@code maximumSize} is zero, elements will be evicted immediately after being loaded into
   * cache. This can be useful in testing, or to disable caching temporarily.
   *
   * <p>This feature cannot be used in conjunction with {@link #maximumWeight}.

  public MultimapsFilterEntriesAsMapTest() {
    super(true, true, false);
  }

  private Multimap<String, Integer> createMultimap() {
    Multimap<String, Integer> unfiltered = HashMultimap.create();
    unfiltered.put("zero", 55556);
    unfiltered.put("one", 55556);
    unfiltered.put("badkey", 1);
    return Multimaps.filterEntries(unfiltered, PREDICATE);
  }

  @Override
  protected Map<String, Collection<Integer>> makeEmptyMap() {

        final int start = dstIndex;

        writeInt2(informationLevel, dst, dstIndex);
        dstIndex += 2;

        /* windows98 has what appears to be another 4 0's followed by the share
         * name as a zero terminated ascii string "\TMP" + '\0'
         *
         * As is this works, but it deviates from the spec section 4.1.6.6 but
         * maybe I should put it in. Wonder what NT does?
         */

		done
	done

}

# Prepare fake disks with losetup
function prepare_block_devices() {
	set -e
	mkdir -p ${WORK_DIR}/disks/ ${WORK_DIR}/mnt/
	sudo modprobe loop
	for i in 1 2 3 4; do
		dd if=/dev/zero of=${WORK_DIR}/disks/img.${i} bs=1M count=2000
		device=$(sudo losetup --find --show ${WORK_DIR}/disks/img.${i})
		sudo mkfs.ext4 -F ${device}
		mkdir -p ${WORK_DIR}/mnt/disk${i}/
		sudo mount ${device} ${WORK_DIR}/mnt/disk${i}/

        }
    }

    // --- Server-side copy path (SMB2 + same tree) for zero-length files ---

    @Test
    @DisplayName("copyFile uses server-side copy for zero-length and returns")
    void copyFile_serverSide_zeroLength_happyPath() throws Exception {
        // Arrange
        SmbFile src = mock(SmbFile.class);

        // Then
        assertNotNull(signingKey, "Should handle all-zero session key");
        assertEquals(16, signingKey.length, "Should produce 16-byte key");
        assertFalse(Arrays.equals(zeroSessionKey, signingKey), "Derived key should be different from all-zero input");
    }

    @Test
    @DisplayName("Should handle edge case with all 0xFF session key")

                TEST_CREATE_TIME, TEST_LAST_WRITE_TIME, TEST_LAST_ACCESS_TIME);

        // The constructor should create FileBasicInfo with attributes | 0x80
        assertNotNull(trans2SetFileInfo);

        // Test with zero attributes
        trans2SetFileInfo =
                new Trans2SetFileInformation(config, TEST_FID, 0x00, TEST_CREATE_TIME, TEST_LAST_WRITE_TIME, TEST_LAST_ACCESS_TIME);
        assertNotNull(trans2SetFileInfo);
    }

   * happens when an {@link AtomicInteger#compareAndSet} fails, but we can simulate the case where
   * the putIfAbsent returns a non-null value, and the case where the replace() of an observed zero
   * fails.
   */
  public void testAdd_withFailures() {
    AtomicInteger existing = new AtomicInteger(12);
    AtomicInteger existingZero = new AtomicInteger(0);

    // initial map.get()

                }
            } else {
                currentStart = -1;
                currentLength = 0;
            }
        }

        // If longest sequence is only 1 zero, don't compress
        if (longestLength <= 1) {
            return String.join(":", normalized);
        }

        // Build compressed address
        final StringBuilder result = new StringBuilder();

        assertNotNull(configWithDefaults.getNativeOs());
        assertTrue(configWithDefaults.getFlags2() != 0, "Flags2 should be non-zero");
        assertTrue(configWithDefaults.getCapabilities() != 0, "Capabilities should be non-zero");
        assertNotNull(configWithDefaults.getBroadcastAddress());
        assertNotNull(configWithDefaults.getResolveOrder());