*
     * @return whether the stream is open
     */
    public boolean isOpen() {
        return this.handle != null && this.handle.isValid();
    }

    /**
     * Ensures that the file handle is open and returns it.
     *
     * @return the open file handle
     * @throws CIFSException if an error occurs opening the file
     */

            this.output.close();
            this.output = null;
        }

        try {
            if (wasOpen) {
                this.handle.close();
            } else if (this.handle != null) {
                this.handle.release();
            }
            this.handle = null;
        } finally {
            if (this.treeHandle != null) {
                this.treeHandle.release();
            }
        }

        assertEquals(Smb2LeaseState.SMB2_LEASE_FULL, fullLease);
    }

    @Test
    @DisplayName("Should handle custom state combinations")
    void testCustomStateCombinations() {
        int customState = 0x06; // Write + Handle but no Read

        assertFalse(Smb2LeaseState.hasReadCaching(customState));
        assertTrue(Smb2LeaseState.hasWriteCaching(customState));

            try {
                digest.verify(data, 0, data.length, 0, response);
                // If no exception is thrown, verification should return false or handle gracefully
                assertTrue(true, "Verify operation after close should either throw exception or handle gracefully");
            } catch (RuntimeException e) {
                // Accept runtime exceptions that might be thrown due to closed state

        // Then
        assertEquals(maxMid, request.getMid(), "Should handle maximum MID");
        assertEquals(maxAsyncId, request.getAsyncId(), "Should handle maximum AsyncId");
        assertEquals(maxCredits, request.getCredit(), "Should handle maximum credits");
        assertEquals(maxTreeId, request.getTreeId(), "Should handle maximum tree ID");
    }

    @Test

/**
 * Microsoft RPC LSA close handle request.
 * This class implements the LSARPC close handle operation.
 */
public class MsrpcLsarClose extends LsarClose {

    /**
     * Creates a new request to close an LSA policy handle.
     *
     * @param handle the policy handle to close
     */
    public MsrpcLsarClose(final policy_handle handle) {
        super(handle);
        this.ptype = 0;

package jcifs.dcerpc.msrpc;

/**
 * MSRPC implementation for opening an alias handle.
 * This class provides functionality to open a handle to a SAM alias
 * (local group) using the SAMR RPC interface.
 */
public class MsrpcSamrOpenAlias extends samr.SamrOpenAlias {

    /**
     * Creates a new request to open an alias handle.
     *
     * @param handle the domain handle
     * @param access the desired access rights

    }

    /**
     * Test isValid() when the handle is valid.
     */
    @Test
    void testIsValid_whenValid() {
        when(smbFileHandle.isValid()).thenReturn(true);
        assertTrue(smbFileHandle.isValid(), "isValid should return true when the handle is valid.");
        verify(smbFileHandle, times(1)).isValid();
    }

    /**
     * Test isValid() when the handle is invalid.
     */
    @Test

 *
 * This class implements the SAMR OpenDomain operation for obtaining
 * a handle to a specific domain in the Security Account Manager.
 */
public class MsrpcSamrOpenDomain extends samr.SamrOpenDomain {

    /**
     * Creates a new request to open a domain handle.
     *
     * @param handle the SAM policy handle
     * @param access the desired access rights
     * @param sid the security identifier of the domain

            assertEquals("application/octet-stream", mimeMap.getMimeType("doesnotexist"));
        }

        @Test
        @DisplayName("Should handle case insensitive extensions")
        void testCaseInsensitiveExtensions() throws IOException {
            assertEquals("application/pdf", mimeMap.getMimeType("PDF"));