CrawlerSystemException exception = new CrawlerSystemException(cause);

        assertNotNull(exception);
        assertSame(cause, exception.getCause());
        // When constructed with cause only, message should be cause's toString()
        assertEquals("java.lang.IllegalArgumentException: Root cause", exception.getMessage());
    }

    /**
     * Test constructor with null cause

    writeOrCountBytes(sink, false)
  }

  /**
   * Either writes this request to [sink] or measures its content length. We have one method
   * do double-duty to make sure the counting and content are consistent, particularly when it comes
   * to awkward operations like measuring the encoded length of header strings, or the
   * length-in-digits of an encoded integer.
   */
  private fun writeOrCountBytes(
    sink: BufferedSink?,

 */
@NullUnmarked
final class InterruptionUtil {
  private static final Logger logger = Logger.getLogger(InterruptionUtil.class.getName());

  /** Runnable which will interrupt the target thread repeatedly when run. */
  private static final class Interruptenator implements Runnable {
    private final long everyMillis;
    private final Thread interruptee;
    private volatile boolean shouldStop = false;

import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;
import org.junit.Ignore;

/**
 * Tester to make sure the {@code iterator().remove()} implementation of {@code Multiset} works when
 * there are multiple occurrences of elements.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@Ignore("test runners must not instantiate and run this directly, only via suites we build")

     *
     * @return an {@link Optional} containing the directory path, or empty if not specified
     */
    @Nonnull
    Optional<String> directory();

    /**
     * Should use inference when upgrading (remove redundant information).
     *
     * @return an {@link Optional} containing the boolean value {@code true} if specified, or empty
     */
    @Nonnull
    Optional<Boolean> infer();

    /**

import java.util.HashSet;
import java.util.Set;

/**
 * Result of an upgrade strategy application.
 * Uses sets of paths to track which POMs were processed, modified, or had errors,
 * avoiding double-counting when multiple strategies affect the same POMs.
 *
 * @param processedPoms the set of POMs that were processed
 * @param modifiedPoms the set of POMs that were modified
 * @param errorPoms the set of POMs that had errors
 */

            }
            fail("Should not reach this point");
        } catch (IOException e) {
            assertEquals("Resource is null", e.getMessage());
            // No NullPointerException should be thrown when exiting try-with-resources
        }
    }

    /**
     * Test resource loading with missing resource.
     * Demonstrates that null InputStream is handled correctly.
     */
    @Test

import org.dbflute.utflute.core.PlainTestCase;

/**
 * Test class to verify proper resource management in Extractor implementations.
 * This test ensures that resources are properly closed even when exceptions occur.
 */
public class ExtractorResourceManagementTest extends PlainTestCase {
    private static final Logger logger = LogManager.getLogger(ExtractorResourceManagementTest.class);

 * default} methods. Instead, it inherits their default implementations. When those implementations
 * invoke methods, they invoke methods on the {@code ForwardingSortedMultiset}.
 *
 * <p>The {@code standard} methods and any collection views they return are not guaranteed to be
 * thread-safe, even when all of the methods that they depend on are thread-safe.
 *
 * @author Louis Wasserman
 * @since 15.0
 */

     * Initializes the process management system with default timeout values.
     */
    public ProcessHelper() {
        // Default constructor
    }

    /**
     * Cleanup method called when the bean is destroyed.
     * Stops all running processes and cleans up resources.
     */
    @PreDestroy
    public void destroy() {
        for (final String sessionId : runningProcessMap.keySet()) {