@ListFeature.Require(SUPPORTS_SET)
  public void testSet_replacingNull() {
    E[] elements = createSamplesArray();
    int i = aValidIndex();
    elements[i] = null;
    collection = getSubjectGenerator().create(elements);

    doTestSet(e3());
  }

  private void doTestSet(E newValue) {
    int index = aValidIndex();
    E initialValue = getList().get(index);
    assertEquals(

        context.setProjectDirectory(tempDir.toFile());

        File file = new File(tempDir.resolve("file.txt").toString());
        if (!file.createNewFile()) {
            throw new IOException("Can't create " + file);
        }
    }

    @Test
    void testRootDirectoryWithNull() {
        context.setProjectDirectory(null);

        IllegalStateException e = assertThrows(

    private final Options options;

    public LookupContext(InvokerRequest invokerRequest, boolean containerCapsuleManaged, Options options) {
        this.invokerRequest = requireNonNull(invokerRequest);
        this.cwd = CWD.create(invokerRequest.cwd());
        this.installationDirectory = CliUtils.getCanonicalPath(invokerRequest.installationDirectory());
        this.userDirectory = CliUtils.getCanonicalPath(invokerRequest.userHomeDirectory());

Если были какие‑либо фоновые задачи (рассматриваются в разделе [Фоновые задачи](background-tasks.md){.internal-link target=_blank}, вы увидите это позже), они будут запущены *после* всех middleware.

///

## Создание middleware { #create-a-middleware }

Для создания middleware используйте декоратор `@app.middleware("http")`.

Функция middleware получает:

* `request` (объект запроса).

 *
 * @author Ben Yu
 */
@NullUnmarked
public class AbstractPackageSanityTestsTest extends TestCase {
  /*
   * This is a public type so that the Android test runner can create an instance directly as it
   * insists upon doing. It then runs the test, which behaves exactly like this package's existing
   * PackageSanityTests. (The test would run on the JVM, too, if not for the suppression below, and

  private CountDownLatch funcCompletionLatch;

  @Override
  protected ListenableFuture<String> buildChainingFuture(ListenableFuture<Integer> inputFuture) {
    outputFuture = SettableFuture.create();
    funcIsWaitingLatch = new CountDownLatch(1);
    funcCompletionLatch = new CountDownLatch(1);
    return transformAsync(inputFuture, new ChainingFunction(), directExecutor());
  }

  @Override

  private CountDownLatch funcCompletionLatch;

  @Override
  protected ListenableFuture<String> buildChainingFuture(ListenableFuture<Integer> inputFuture) {
    outputFuture = SettableFuture.create();
    funcIsWaitingLatch = new CountDownLatch(1);
    funcCompletionLatch = new CountDownLatch(1);
    return transformAsync(inputFuture, new ChainingFunction(), directExecutor());
  }

  @Override

   * hashers are the same order as the functions given to the constructor.
   */
  // this could be cleaner if it passed HashCode[], but that would create yet another array...
  /* protected */ abstract HashCode makeHash(Hasher[] hashers);

  @Override
  public Hasher newHasher() {
    Hasher[] hashers = new Hasher[functions.length];

    implements RowSortedTable<R, C, V> {
  /*
   * TODO(jlevy): Consider adding headTable, tailTable, and subTable methods,
   * which return a Table view with rows keys in a given range. Create a
   * RowSortedTable subinterface with the revised methods?
   */

  StandardRowSortedTable(
      SortedMap<R, Map<C, V>> backingMap, Supplier<? extends Map<C, V>> factory) {
    super(backingMap, factory);
  }

func (u Err) Hint(m string, args ...any) Err {
	e := u.Clone()
	e.hint = fmt.Sprintf(m, args...)
	return e
}

// ErrFn function wrapper
type ErrFn func(err error) Err

// Create a UI error generator, this is needed to simplify
// the update of the detailed error message in several places
// in MinIO code
func newErrFn(msg, action, hint string) ErrFn {
	return func(err error) Err {
		u := Err{