assertEquals(customTree, typedResult, "Should maintain type safety");
    }

    /**
     * Test for close() idempotency.
     * Verifies that calling close multiple times has the same effect as calling it once.
     */
    @Test
    void testClose_idempotency() {
        // Mock a tree that tracks close state
        SmbTree idempotentTree = mock(SmbTree.class);

    private String url;
    private SmbAuthException sae;

    /**
     * Set the default <code>NtlmAuthenticator</code>. Once the default authenticator is set it cannot be changed. Calling
     * this metho again will have no effect.
     *
     * @param a the authenticator to set as default
     */

    public synchronized static void setDefault(final NtlmAuthenticator a) {
        if (auth != null) {

        Mockito.verify(mock, Mockito.times(1)).getLastAccessTime();
        Mockito.verify(mock, Mockito.times(1)).getSize();
        Mockito.verifyNoMoreInteractions(mock);
    }

    // --- Invalid/null usage: calling a method on null should throw NPE ---
    @Test
    void nullReference_throwsNullPointerException() {
        // Arrange
        SmbBasicFileInfo info = null;

    private void reset() {
        url = null;
        sae = null;
    }

    /**
     * Set the default <code>NtlmAuthenticator</code>. Once the default authenticator is set it cannot be changed. Calling this metho again will have no effect.
     * @param a the authenticator to set as default
     */

    public synchronized static void setDefault(final NtlmAuthenticator a) {
        if (auth != null) {

 */

package jcifs.internal.smb1.trans;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.Configuration;

/**
 * SMB1 transaction subcommand for calling a named pipe.
 *
 * This class implements the TRANS_CALL_NAMED_PIPE transaction which allows
 * writing data to and reading data from a named pipe in a single operation.
 */

         * @return the component instance
         */
        protected T get() {
            return instance;
        }

        /**
         * Destroys the component by calling any @PreDestroy annotated methods
         * and the destroyer function if present.
         */
        protected void destroy() {
            final BeanDesc beanDesc = BeanDescFactory.getBeanDesc(instance.getClass());

        // Negative interaction check: no further interactions with the mock
        verifyNoMoreInteractions(renewable);
    }

    @Test
    @DisplayName("Edge: calling renew() on a null reference throws NPE")
    void renewOnNullReferenceThrowsNPE() {
        // Arrange: null reference to the interface
        SmbRenewableCredentials creds = null;

            // Given: Test handle with configured return values
            handle.setDoSendReceiveFragmentReturn(100);
            handle.setDoReceiveFragmentReturn(50);

            // When: Calling fragment methods
            int sendReceiveResult = handle.doSendReceiveFragment(new byte[10], 0, 10, new byte[100]);
            int receiveResult = handle.doReceiveFragment(new byte[100]);

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    public CrawlerClientFactory getParent() {
        return factory;
    }

    /**
     * Sets the initialization parameter map for this wrapper.
     * These parameters will be applied to the wrapped factory upon calling initParameterMap().
     * @param params The map of parameters.
     */
    @Override
    public void setInitParameterMap(final Map<String, Object> params) {
        this.params.putAll(params);
    }

    /**