assertEquals("a,b,c=>output", item.toLineString());
    }

    public void test_toLineString_withUpdates() {
        String[] inputs = { "old1", "old2" };
        CharMappingItem item = new CharMappingItem(1L, inputs, "oldOutput");

        item.setNewInputs(new String[] { "new1", "new2", "new3" });
        item.setNewOutput("newOutput");

                v3(),
                (oldV, newV) -> {
                  assertEquals(v0(), oldV);
                  assertEquals(v3(), newV);
                  return null;
                }));
    expectMissing(e0());
  }

  public void testMergeNullValue() {
    try {
      getMap()
          .merge(
              k0(),
              null,
              (oldV, newV) -> {

                v3(),
                (oldV, newV) -> {
                  assertEquals(v0(), oldV);
                  assertEquals(v3(), newV);
                  return null;
                }));
    expectMissing(e0());
  }

  public void testMergeNullValue() {
    try {
      getMap()
          .merge(
              k0(),
              null,
              (oldV, newV) -> {

```Python
old_dict = {
    "old key": "old value",
    "second old key": "second old value",
}
new_dict = {**old_dict, "new key": "new value"}
```

Here, `new_dict` will contain all the key-value pairs from `old_dict` plus the new key-value pair:

```Python
{
    "old key": "old value",
    "second old key": "second old value",
    "new key": "new value",
}
```

    public void testWriteParameterWordsWireFormat() {
        // Given
        byte[] dst = new byte[10];
        smbComRename = new SmbComRename(config, "old.txt", "new.txt");
        int dstIndex = 2;

        // When
        int result = smbComRename.writeParameterWordsWireFormat(dst, dstIndex);

        // Then
        assertEquals(2, result);

     */
    public void addNewIPAddress(InetAddress address) {
        newIPAddresses.add(new WitnessIPAddress(address));
    }

    /**
     * Adds an old IP address to the notification.
     *
     * @param address the old IP address
     */
    public void addOldIPAddress(InetAddress address) {
        oldIPAddresses.add(new WitnessIPAddress(address));
    }

    // Getters and Setters

    }

    @Test
    @DisplayName("Test automatic cleanup of old resources")
    @Timeout(value = 5, unit = TimeUnit.SECONDS)
    void testAutomaticCleanup() throws InterruptedException {
        // Configure with very short max age for testing
        resourceManager.configure(100, 50, true, true);

        TestResource resource = new TestResource("old");
        resourceManager.registerResource(resource);

 *   <li>Old document deletion after successful crawling</li>
 *   <li>Crawling execution monitoring and timing</li>
 * </ul>
 */
public class DataIndexHelper {

    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(DataIndexHelper.class);

    /** Parameter key for controlling deletion of old documents */

    int originalCount = getMultiset().count(e0());
    assertEquals("old count", originalCount, getMultiset().remove(e0(), 0));
    expectUnchanged();
  }

  @CollectionSize.Require(absent = ZERO)
  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testRemove_occurrences_present() {
    assertEquals(
        "multiset.remove(present, 2) didn't return the old count",
        1,
        getMultiset().remove(e0(), 2));

    int originalCount = getMultiset().count(e0());
    assertEquals("old count", originalCount, getMultiset().remove(e0(), 0));
    expectUnchanged();
  }

  @CollectionSize.Require(absent = ZERO)
  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testRemove_occurrences_present() {
    assertEquals(
        "multiset.remove(present, 2) didn't return the old count",
        1,
        getMultiset().remove(e0(), 2));