void unwrap_null_type_throws() {
        TestCredentials creds = new TestCredentials("DOM", false, false, new Subject(), false);
        // Act & Assert
        NullPointerException npe = assertThrows(NullPointerException.class, () -> creds.unwrap(null));
        assertEquals("type", npe.getMessage());
    }

    @Test
    @DisplayName("clone returns a distinct copy with same properties")

                throw new NullPointerException("dir and name must be non-null");
            }
            return true;
        };

        NullPointerException npe1 = assertThrows(NullPointerException.class, () -> filter.accept(null, "x"));
        assertTrue(npe1.getMessage().contains("non-null"));

        NullPointerException npe2 = assertThrows(NullPointerException.class, () -> filter.accept(mockDir, null));

        final ClIllegalStateException clIllegalStateException = new ClIllegalStateException("hoge", new NullPointerException());
        assertThat(clIllegalStateException.getMessage(), is("hoge"));
        assertThat(clIllegalStateException.getCause(), instanceOf(NullPointerException.class));
    }

    /**
     * Test method for

   *
   * @throws NullPointerException if the element is null
   * @since 6.0 (source-compatible since 2.0)
   */
  public static <E> ImmutableMultiset<E> of(E e1) {
    return copyFromElements(e1);
  }

  /**
   * Returns an immutable multiset containing the given elements, in order.
   *
   * @throws NullPointerException if any element is null

    assertThrows(NullPointerException.class, () -> builder.put(null, 1));
    assertThrows(NullPointerException.class, () -> builder.putAll(null, Arrays.asList(1, 2, 3)));
    assertThrows(NullPointerException.class, () -> builder.putAll(null, 1, 2, 3));
    assertThrows(
        NullPointerException.class, () -> builder.putAll((Multimap<String, Integer>) toPut));
  }

        @Test
        @DisplayName("Null handle triggers NullPointerException")
        void ctor_nullHandle_throwsNPE() {
            // Act + Assert
            assertThrows(NullPointerException.class, () -> new SmbPipeOutputStream(null, tree));
        }

        @Test
        @DisplayName("Null tree handle triggers NullPointerException")
        void ctor_nullTree_throwsNPE() {
            // Arrange

    checkResult(J, OVERREPORTING_SIZE_LIST, "1-2-3");

    assertThrows(NullPointerException.class, () -> J.join(iterableNull));
    assertThrows(NullPointerException.class, () -> J.join(iterable1Null2));

    assertThrows(NullPointerException.class, () -> J.join(iterableNull.iterator()));
    assertThrows(NullPointerException.class, () -> J.join(iterable1Null2.iterator()));
  }

  public void testOnCharOverride() {

    assertThrows(NullPointerException.class, () -> builder.add((String) null));
  }

  public void testBuilderAddAllHandlesNullsCorrectly() {
    {
      ImmutableSortedMultiset.Builder<String> builder = ImmutableSortedMultiset.naturalOrder();
      assertThrows(NullPointerException.class, () -> builder.addAll((Collection<String>) null));
    }

    {

  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)
  public void testReplaceEntry_presentNullValueUnsupported() {
    assertThrows(NullPointerException.class, () -> getMap().replace(k0(), v0(), null));
    expectUnchanged();
  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUE_QUERIES)
  @CollectionSize.Require(absent = ZERO)

public enum MapFeature implements Feature<Map> {
  /**
   * The map does not throw {@code NullPointerException} on calls such as {@code containsKey(null)},
   * {@code get(null)}, {@code keySet().contains(null)} or {@code remove(null)}.
   */
  ALLOWS_NULL_KEY_QUERIES,
  ALLOWS_NULL_KEYS(ALLOWS_NULL_KEY_QUERIES),
  /**
   * The map does not throw {@code NullPointerException} on calls such as {@code