assertNull(unwrapped);
        }

        @Test
        void unwrapDOSFilter_returnsNull_whenWrapperButNotDosFilter() throws Exception {
            // Wrapper but not wrapping a DosFileFilter
            SmbFileFilter nonDosFilter = mock(SmbFileFilter.class);
            Object wrapper = newPrivateInner("ResourceFilterWrapper", new Class<?>[] { SmbFileFilter.class }, nonDosFilter);

- **Assertion-based validation** - All methods validate inputs using `AssertionUtil.assertArgumentNotNull()` and `AssertionUtil.assertArgumentNotEmpty()`
- **Exception wrapping** - Checked exceptions are consistently wrapped in runtime exceptions (e.g., `ClassNotFoundException` → `ClassNotFoundRuntimeException`)

import org.dbflute.utflute.core.PlainTestCase;

/**
 * Test class for CrawlerPooledObjectFactory.
 * Tests the pooled object factory functionality including object creation,
 * wrapping, destruction, and listener mechanisms.
 */
public class CrawlerPooledObjectFactoryTest extends PlainTestCase {

    private CrawlerPooledObjectFactory<TestComponent> factory;
    private StandardCrawlerContainer container;

        }
        return this.handle.acquire();
    }

    /**
     * Converts an SmbException to an IOException
     *
     * @param se the SmbException to convert
     * @return an IOException wrapping the SmbException
     */
    protected static IOException seToIoe(final SmbException se) {
        IOException ioe = se;
        Throwable root = se.getCause();
        if (root instanceof TransportException) {

        }

        throw uhe != null ? uhe : new UnknownHostException("invalid name");
    }
     */

    Object addr;
    String calledName;

    /**
     * Create a <code>UniAddress</code> by wrapping an {@code InetAddress} or
     * <code>NbtAddress</code>.
     *
     * @param addr the address to wrap
     */

    public UniAddress(final Object addr) {
        if (addr == null) {

        when(pipe.ensureTreeConnected()).thenReturn(tree);
        when(tree.acquire()).thenReturn(tree);

        // Use doThrow for unchecked exception wrapping the CIFSException
        doThrow(new RuntimeException(new CIFSException("session fail"))).when(tree).getSession();

        Exception ex = assertThrows(Exception.class, handle::getSessionKey);
        assertTrue(

https://html.spec.whatwg.org/multipage/#the-fieldset-and-legend-elements\n  min-width: 0;\n  // Reset the default outline behavior of fieldsets so they don't affect page layout.\n  padding: 0;\n  margin: 0;\n  border: 0;\n}\n\n// 1. Correct the text wrapping in Edge and IE.\n// 2. Correct the color inheritance from `fieldset` elements in IE.\nlegend {\n  display: block;\n  width: 100%;\n  max-width: 100%; // 1\n  padding: 0;\n  margin-bottom: .5rem;\n  @include font-size(1.5rem);\n  line-height: inherit;\n...

min-width: 0; // 1\n  padding: 0; // 2\n  margin: 0; // 2\n  border: 0; // 2\n}\n\n// 1. By using `float: left`, the legend will behave like a block element.\n//    This way the border of a fieldset wraps around the legend if present.\n// 2. Fix wrapping bug.\n//    See https://github.com/twbs/bootstrap/issues/29712\n\nlegend {\n  float: left; // 1\n  width: 100%;\n  padding: 0;\n  margin-bottom: $legend-margin-bottom;\n  @include font-size($legend-font-size);\n  font-weight: $legend-font-weight;\n...

https://html.spec.whatwg.org/multipage/#the-fieldset-and-legend-elements\n  min-width: 0;\n  // Reset the default outline behavior of fieldsets so they don't affect page layout.\n  padding: 0;\n  margin: 0;\n  border: 0;\n}\n\n// 1. Correct the text wrapping in Edge and IE.\n// 2. Correct the color inheritance from `fieldset` elements in IE.\nlegend {\n  display: block;\n  width: 100%;\n  max-width: 100%; // 1\n  padding: 0;\n  margin-bottom: .5rem;\n  @include font-size(1.5rem);\n  line-height: inherit;\n...