assertFalse(TypeToken.of(wildcardType).isSupertypeOf(wildcardType));
    assertFalse(TypeToken.of(int[].class).isSupertypeOf(wildcardType));
  }

  public void testAssignableWildcardTypeParameterToClassTypeParameter() {
    TypeToken<?> wildcardType = new TypeToken<Iterable<? extends Object[]>>() {};
    assertFalse(new TypeToken<Iterable<Object[]>>() {}.isSupertypeOf(wildcardType));

  }

  protected void expectMissingKeys(K... elements) {
    for (K element : elements) {
      assertFalse("Should not contain key " + element, getMap().containsKey(element));
    }
  }

  protected void expectMissingValues(V... elements) {
    for (V element : elements) {
      assertFalse("Should not contain value " + element, getMap().containsValue(element));
    }
  }

  /**

        assertTrue(keyManager.hasSessionKey(sessionId + ".v3"), "Version 3 should exist");
        assertFalse(keyManager.hasSessionKey(sessionId + ".v2"), "Version 2 should be removed");
        assertFalse(keyManager.hasSessionKey(sessionId + ".v1"), "Version 1 should be removed");
        assertFalse(keyManager.hasSessionKey(sessionId + ".v0"), "Version 0 should be removed");
    }

    @Test

@GwtCompatible
public class MinimalIterableTest extends TestCase {

  public void testOf_empty() {
    Iterable<String> iterable = MinimalIterable.<String>of();
    Iterator<String> iterator = iterable.iterator();
    assertFalse(iterator.hasNext());
    assertThrows(NoSuchElementException.class, () -> iterator.next());
    assertThrows(IllegalStateException.class, () -> iterable.iterator());
  }

  public void testOf_one() {

        assertFalse(validator.determineValid("invalid"));
        assertFalse(validator.determineValid("too many fields here * * * * * * *"));
        assertFalse(validator.determineValid("* * * *"));
    }

    public void test_isValid_basicInvalidCronExpression() {
        final ConstraintValidatorContext context = null;
        assertFalse(validator.isValid("invalid cron", context));

        assertFalse(iterator.hasNext());
        assertNull(iterator.next());

        verify(resource, never()).close();
    }

    @Test
    @DisplayName("Empty iterator")
    void emptyIterator() {
        when(delegate.hasNext()).thenReturn(false);

        TestIterator iterator = new TestIterator(null);

        assertFalse(iterator.hasNext());

    int oldSize = getNumElements();

    Collection<V> result = multimap().asMap().get(k0());
    assertTrue(result.remove(v0()));

    assertFalse(multimap().containsKey(k0()));
    assertFalse(multimap().containsEntry(k0(), v0()));
    assertEmpty(result);

    assertTrue(result.add(v1()));
    assertTrue(result.add(v2()));

    assertContentsAnyOrder(result, v1(), v2());

    try {
      assertFalse(
          "remove(null) should return false or throw NullPointerException",
          collection.remove(null));
    } catch (NullPointerException tolerated) {
    }
    expectUnchanged();
  }

  @CollectionFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_QUERIES})
  public void testRemove_nullAllowed() {

    }

    public void test_ofNullable_withNullString() {
        String testValue = null;
        OptionalEntity<String> result = OptionalUtil.ofNullable(testValue);

        assertNotNull(result);
        assertFalse(result.isPresent());
    }

    public void test_ofNullable_withEmptyString() {
        String testValue = "";
        OptionalEntity<String> result = OptionalUtil.ofNullable(testValue);

        assertFalse(user.isEditable());

        // Test with different user configurations
        user = new TestFessUser("admin", new String[] { "admin" }, new String[] { "admins" }, new String[] { "*" });
        assertFalse(user.isEditable());

        user = new TestFessUser("", new String[] {}, new String[] {}, new String[] {});
        assertFalse(user.isEditable());
    }