URLStreamHandlerFactory mockFactory2 = mock(URLStreamHandlerFactory.class);

        Handler.setURLStreamHandlerFactory(mockFactory1); // First call, should succeed.

        assertThrows(IllegalStateException.class, () -> {
            Handler.setURLStreamHandlerFactory(mockFactory2); // Second call, should fail.
        }, "Setting the factory a second time should throw IllegalStateException.");
    }

    @Test

/**
 * A {@link ScheduledExecutorService} that returns {@link ListenableFuture} instances from its
 * {@code ExecutorService} methods. To create an instance from an existing {@link
 * ScheduledExecutorService}, call {@link
 * MoreExecutors#listeningDecorator(ScheduledExecutorService)}.
 *
 * @author Chris Povirk
 * @since 10.0
 */
@GwtIncompatible
public interface ListeningScheduledExecutorService

@echo off
@REM set title of command window
title %0
@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
@if "%MAVEN_BATCH_ECHO%"=="on" echo %MAVEN_BATCH_ECHO%

@setlocal

                  // transitioned to a failed state, also this means that shutDown has already
                  // been called, so we do not want to call it again.
                  return;
                }
                shutDown();
              } finally {
                lock.unlock();
              }
              notifyStopped();

        controller.delayMillisForWaitingNewUrl = 0L;
        controller.delayMillisAtNoUrlInQueue = 0L;

        final Callable<Integer> testCallable = new Callable<Integer>() {
            public Integer call() throws Exception {
                CrawlingParameterUtil.setUrlQueue(q);
                controller.delayBeforeProcessing();
                return 0;
            }
        };

	ADDW 433954697820(AX), AX       // ERROR "offset too large"
	// Pseudo-registers should not be used as scaled index.
	CALL (AX)(PC*1)                 // ERROR "invalid instruction"
	CALL (AX)(SB*1)                 // ERROR "invalid instruction"
	CALL (AX)(FP*1)                 // ERROR "invalid instruction"
	// Forbid memory operands for MOV CR/DR. See #24981.

	MaxTimeout = "max_timeout"

	// HelpDrive is help for drive
	HelpDrive = config.HelpKVS{
		config.HelpKV{
			Key:         MaxTimeout,
			Type:        "string",
			Description: "set per call max_timeout for the drive, defaults to 30 seconds",
			Optional:    true,
		},
	}

		"CMPBNE",
		"CMPUBEQ",
		"CMPUBGE",
		"CMPUBGT",
		"CMPUBLE",
		"CMPUBLT",
		"CMPUBNE",
		"CRJ",
		"CGRJ",
		"CLRJ",
		"CLGRJ",
		"CIJ",
		"CGIJ",
		"CLIJ",
		"CLGIJ",
		"CALL",
		"JMP":
		return true
	}
	return false
}

func s390xRegisterNumber(name string, n int16) (int16, bool) {
	switch name {
	case "AR":
		if 0 <= n && n <= 15 {
			return s390x.REG_AR0 + n, true
		}

        // Constructor accepts null principal without throwing exception
        NtlmHttpServletRequest request = new NtlmHttpServletRequest(mockRequest, null);

        // getRemoteUser() will throw NPE when trying to call getName() on null principal
        assertThrows(NullPointerException.class, () -> request.getRemoteUser());
        assertNull(request.getUserPrincipal());
        assertEquals("NTLM", request.getAuthType());
    }

    E[] array = createArrayWithNullElement();
    resetContainer(getSubjectGenerator().create(array));
  }

  /**
   * Equivalent to {@link #expectMissing(Object[]) expectMissing}{@code (null)} except that the call
   * to {@code contains(null)} is permitted to throw a {@code NullPointerException}.
   *
   * @param message message to use upon assertion failure
   */
  protected void expectNullMissingWhenNullUnsupported(String message) {