assertThrows(IllegalArgumentException.class, () -> escapeAsString(SIMPLE_ESCAPER, test));
  }

  public void testNullInput() {
    UnicodeEscaper e = SIMPLE_ESCAPER;
    assertThrows(NullPointerException.class, () -> e.escape((String) null));
  }

  public void testBadStrings() {
    UnicodeEscaper e = SIMPLE_ESCAPER;
    String[] BAD_STRINGS = {
      String.valueOf(Character.MIN_LOW_SURROGATE),

    expectAdded((E) null);
  }

  @CollectionFeature.Require(value = SUPPORTS_ADD, absent = ALLOWS_NULL_VALUES)
  public void testAdd_nullUnsupported() {
    assertThrows(NullPointerException.class, () -> collection.add(null));
    expectUnchanged();
    expectNullMissingWhenNullUnsupported("Should not contain null after unsupported add(null)");
  }

    assertThrows(IllegalArgumentException.class, () -> escapeAsString(SIMPLE_ESCAPER, test));
  }

  public void testNullInput() {
    UnicodeEscaper e = SIMPLE_ESCAPER;
    assertThrows(NullPointerException.class, () -> e.escape((String) null));
  }

  public void testBadStrings() {
    UnicodeEscaper e = SIMPLE_ESCAPER;
    String[] BAD_STRINGS = {
      String.valueOf(Character.MIN_LOW_SURROGATE),

    @Test
    @DisplayName("Test getInfo with class when info is null throws NullPointerException")
    void testGetInfoWithClassWhenInfoIsNull() {
        response = new Smb2QueryInfoResponse(mockConfig, (byte) 1, (byte) 2);

        assertThrows(NullPointerException.class, () -> response.getInfo(FileInternalInfo.class),
                "Should throw NullPointerException when info is null");
    }

    @Test

  }

  @CollectionFeature.Require(absent = ALLOWS_NULL_QUERIES)
  public void testContainsAll_nullNotAllowed() {
    try {
      assertFalse(collection.containsAll(MinimalCollection.of((E) null)));
    } catch (NullPointerException tolerated) {
    }
  }

  @CollectionFeature.Require(ALLOWS_NULL_QUERIES)
  public void testContainsAll_nullAllowed() {
    assertFalse(collection.containsAll(MinimalCollection.of((E) null)));
  }

        assertEquals(longMessage, exception.getMessage());
    }

    public void test_multiLevelExceptionChain() {
        // Test multi-level exception chain
        Throwable level3 = new NullPointerException("Null value");
        Throwable level2 = new IllegalStateException("Invalid state", level3);
        Throwable level1 = new RuntimeException("Runtime error", level2);

   * This reduces the expense of habitually making defensive copies at API boundaries. However, the
   * precise conditions for skipping the copy operation are undefined.
   *
   * @throws NullPointerException if any of {@code elements} is null
   * @since 7.0 (source-compatible since 2.0)
   */
  // This the best we could do to get copyOfEnumSet to compile in the mainline.

 */
@SuppressWarnings("rawtypes") // maybe avoidable if we rework the whole package?
@GwtCompatible
public enum CollectionFeature implements Feature<Collection> {
  /**
   * The collection must not throw {@code NullPointerException} on calls such as {@code
   * contains(null)} or {@code remove(null)}, but instead must return a simple {@code false}.
   */
  ALLOWS_NULL_QUERIES,
  ALLOWS_NULL_VALUES(ALLOWS_NULL_QUERIES),

  /**

        ace.allow = true;
        ace.access = 0x001200A9;
        ace.flags = 0x00;
        ace.sid = null;

        // This should throw NullPointerException as the current implementation doesn't handle null SID
        assertThrows(NullPointerException.class, () -> ace.toString());
    }

    @Test
    @DisplayName("Test decode creates new SID instance")
    void testDecodeCreatesNewSID() {

        assertThrows(NullPointerException.class,
                () -> new SmbFileHandleImpl(cfg, new byte[] { 1, 2 }, null, "//server/share", 0, 0, 0, 0, 0L));
    }

    @Test
    @DisplayName("Constructor with null cfg throws NPE")
    void constructor_nullCfg_throwsNPE() {
        stubValidTree(7L, true, true);