var allVersionIDs, freeVersionIDs []string
	for i := range 5 {
		fi := basefi
		fi.VersionID = mustGetUUID()
		fi.DataDir = mustGetUUID()
		fi.ModTime = basefi.ModTime.Add(time.Duration(i) * time.Second)
		if err := xl.AddVersion(fi); err != nil {
			t.Fatalf("%d: Failed to add version %v", i+1, err)
		}

		if i > 3 {
			// Simulate transition of a version
			transfi := fi

import static com.google.common.hash.Funnels.unencodedCharsFunnel;
import static com.google.common.truth.Truth.assertThat;
import static java.nio.charset.StandardCharsets.UTF_8;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertThrows;

import com.google.common.base.Stopwatch;
import com.google.common.collect.ImmutableSet;
import com.google.common.hash.BloomFilterStrategies.LockFreeBitArray;

   * the {@code shutdownNow} method. First, "best-effort" with regards to canceling running tasks is
   * implemented as "no-effort". No interrupts or other attempts are made to stop threads executing
   * tasks. Second, the returned list will always be empty, as any submitted task is considered to
   * have started execution. This applies also to tasks given to {@code invokeAll} or {@code

            return null;
        }).when(mockDcerpcHandle).sendrecv(any(MsrpcSamrCloseHandle.class));

        // First close call
        handle.close();

        // Act
        // Second close call
        handle.close();

        // Assert
        // sendrecv for open is called once
        verify(mockDcerpcHandle, times(1)).sendrecv(any(MsrpcSamrOpenDomain.class));

        LogStream instance2 = LogStream.getInstance();

        // Each setInstance should create a new LogStream
        assertNotNull(instance1);
        assertNotNull(instance2);
        // The second setInstance replaces the first, so they should not be the same
        assertNotSame(instance1, instance2);
        // Getting instance again should return the same as instance2

* `expose_headers` - Indicate any response headers that should be made accessible to the browser. Defaults to `[]`.
* `max_age` - Sets a maximum time in seconds for browsers to cache CORS responses. Defaults to `600`.

The middleware responds to two particular types of HTTP request...

### CORS preflight requests { #cors-preflight-requests }

        // Scenario 2: Command timeout
        CommandExecutionException timeout =
                new CommandExecutionException("Command execution timed out after 30 seconds", new RuntimeException("Timeout"));
        assertTrue(timeout.getMessage().contains("timed out"));
        assertNotNull(timeout.getCause());

        // Scenario 3: Permission denied

      this.delegate = null
      delegate.onFailure(webSocket, t, response)
    } else {
      events.add(Failure(t, response))
    }
  }

  private fun nextEvent(): Any =
    events.poll(10, TimeUnit.SECONDS)
      ?: throw AssertionError("Timed out waiting for event.")

  fun assertTextMessage(payload: String?) {
    assertThat(nextEvent()).isEqualTo(Message(string = payload))
  }

        // Check first level cause
        assertNotNull(exception.getCause());
        assertEquals("Intermediate problem", exception.getCause().getMessage());

        // Check second level cause
        assertNotNull(exception.getCause().getCause());
        assertEquals("Root problem", exception.getCause().getCause().getMessage());
    }

    public void test_messageWithSpecialCharacters() {

        SamrPolicyHandle handle = new SamrPolicyHandle(mockHandle, server, access);
        handle.close(); // First close
        handle.close(); // Second close

        // Verify sendrecv for close was called only once
        verify(mockHandle, times(1)).sendrecv(any(MsrpcSamrCloseHandle.class));
    }

    @Test