if (entry.getKey().equals(k0())) {
        assertThrows(IllegalArgumentException.class, () -> entry.setValue(v1()));
      }
    }
    expectUnchanged();
  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)
  public void testSetValueNullUnsupported() {
    for (Entry<K, V> entry : getMap().entrySet()) {

            }
            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));
        assertTrue(npe2.getMessage().contains("non-null"));

        c = values.get(2);
      }
    }
  }

  @CollectionSize.Require(ZERO)
  public void testEmptySetFirst() {
    assertThrows(NoSuchElementException.class, () -> sortedSet.first());
  }

  @CollectionSize.Require(ZERO)
  public void testEmptySetLast() {
    assertThrows(NoSuchElementException.class, () -> sortedSet.last());
  }

  @CollectionSize.Require(ONE)
  public void testSingletonSetFirst() {

        byte[] emptyToken = new byte[0];
        assertThrows(PACDecodingException.class, () -> new KerberosToken(emptyToken));
    }

    /**
     * Test constructor with a malformed token (not ASN.1).
     */
    @Test
    void testConstructorWithMalformedToken() {
        byte[] malformedToken = "This is not a valid token".getBytes();
        assertThrows(PACDecodingException.class, () -> new KerberosToken(malformedToken));

    assertThat(Chars.ensureCapacity(ARRAY1, 2, 1))
        .isEqualTo(new char[] {(char) 1, (char) 0, (char) 0});
  }

  public void testEnsureCapacity_fail() {
    assertThrows(IllegalArgumentException.class, () -> Chars.ensureCapacity(ARRAY1, -1, 1));
    assertThrows(IllegalArgumentException.class, () -> Chars.ensureCapacity(ARRAY1, 1, -1));
  }

  public void testJoin() {
    assertThat(Chars.join(",", EMPTY)).isEmpty();

    ImmutableMultiset.Builder<String> builder = ImmutableMultiset.builder();
    assertThrows(NullPointerException.class, () -> builder.add((String) null));
  }

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

    {

  }

  public void testBuilderAddHandlesNullsCorrectly() {
    ImmutableList.Builder<String> builder = ImmutableList.builder();
    assertThrows(NullPointerException.class, () -> builder.add((String) null));

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

    assertThrows(NullPointerException.class, () -> builder.add("a", null, "b"));
  }

  public void testBuilderAddAllHandlesNullsCorrectly() {

import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.mock;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;

    assertThrows(
        UnsupportedOperationException.class,
        () -> collection.addAll(MinimalCollection.of(e3(), e0())));
    expectUnchanged();
  }

  @CollectionFeature.Require({SUPPORTS_ADD, FAILS_FAST_ON_CONCURRENT_MODIFICATION})
  @CollectionSize.Require(absent = ZERO)
  public void testAddAllConcurrentWithIteration() {
    assertThrows(
        ConcurrentModificationException.class,

  }

  @ListFeature.Require(SUPPORTS_SET)
  public void testSet_indexTooLow() {
    assertThrows(IndexOutOfBoundsException.class, () -> getList().set(-1, e3()));
    expectUnchanged();
  }

  @ListFeature.Require(SUPPORTS_SET)
  public void testSet_indexTooHigh() {
    int index = getNumElements();
    assertThrows(IndexOutOfBoundsException.class, () -> getList().set(index, e3()));
    expectUnchanged();
  }