assertFalse(target.isOpen());
        assertFalse(target.isStale());

        // After ensureOpen, handle valid -> open
        SmbFileHandleImpl fh = target.ensureOpen();
        assertSame(fileHandle, fh);
        assertTrue(target.isOpen());
        assertFalse(target.isStale());

        // If handle becomes invalid, reflect stale

    }

    @Test
    @DisplayName("Should handle null hostname in getByName")
    void testGetByNameWithNull() {
        // When/Then
        assertThrows(UnknownHostException.class, () -> {
            nameServiceClient.getByName(null);
        }, "Should throw UnknownHostException for null hostname");
    }

    @Test
    @DisplayName("Should handle empty hostname in getByName")
    void testGetByNameWithEmpty() {

 */
package jcifs;

/**
 * Handle to an open file
 *
 * @author mbechler
 *
 */
public interface SmbFileHandle extends AutoCloseable {

    /**
     * Returns the tree handle associated with this file handle
     *
     * @return the tree
     */
    SmbTreeHandle getTree();

    /**
     * Checks if this file handle is still valid
     *

        assertSame(pipe, handle.getPipe(), "Handle should reference originating pipe");
        assertSame(handle, handle.unwrap(SmbPipeHandle.class), "unwrap should return same instance for interface type");
    }

    @ParameterizedTest
    @DisplayName("getPipeType echoes constructor input (edge values)")

    }

    @Test
    @DisplayName("Constructor should handle null parent")
    void testConstructor_NullParent_ThrowsNPE() {
        // When & Then: Null parent should cause NullPointerException
        assertThrows(NullPointerException.class, () -> new NetServerEnumIterator(null, treeHandle, "*", 0, null));
    }

    @Test
    @DisplayName("Constructor should handle null tree handle")

        when(handle.hasCapability(anyInt())).thenReturn(true);

        // Act: perform a series of calls to verify order
        handle.ensureDFSResolved();
        handle.hasCapability(7);
        handle.release();

        // Assert: verify they happened in order
        InOrder inOrder = inOrder(handle);
        inOrder.verify(handle).ensureDFSResolved();
        inOrder.verify(handle).hasCapability(7);

        // Verify it's an instance of ServerMessageBlock2Response
        assertTrue(lockResponse instanceof jcifs.internal.smb2.ServerMessageBlock2Response);
    }

    @Test
    @DisplayName("Constructor should handle null configuration")
    void testConstructorWithNullConfig() {
        // Given & When
        Smb2LockResponse lockResponse = new Smb2LockResponse(null);

        // Then
        assertNotNull(lockResponse);
    }

        assertEquals("testdomain", config.getDefaultDomain());
    }

    @Test
    @DisplayName("Should handle null properties gracefully")
    void testNullProperties() throws CIFSException {
        // PropertyConfiguration doesn't handle null properties
        // It should throw NullPointerException
        assertThrows(NullPointerException.class, () -> {

        Callback[] cbs = new Callback[] { nc, pc };
        auth.handle(cbs);

        // Name should be formatted as username@domain
        assertEquals("user@DOM", nc.getName());
        // Password should be set
        assertEquals("pass", new String(pc.getPassword()));
    }

    @Test
    @DisplayName("handle: sets only provided callbacks (name-only)")
    void testHandleNameOnly() throws Exception {

        }

        @Test
        @DisplayName("Should handle null file ID in setter")
        void testSetNullFileId() {
            assertDoesNotThrow(() -> request.setFileId(null));
        }

        @Test
        @DisplayName("Should handle various file ID sizes")
        void testVariousFileIdSizes() {
            byte[] shortFileId = new byte[8];