byte[] serverEncryptionKey = new byte[8];
        byte[] unicodeHash = new byte[24];

        when(mockTransport.getContext()).thenReturn(mockContext);
        when(mockContext.getConfig()).thenReturn(mockConfig);
        when(mockConfig.getLanManCompatibility()).thenReturn(lmCompatibility);
        when(mockTransport.getServerEncryptionKey()).thenReturn(serverEncryptionKey);

        assertSame(transport, acquired);
        transport.close(); // release once
    }

    @Test
    @DisplayName("Server encryption key is returned for SMB1 negotiation only")
    void serverEncryptionKey() {
        // No negotiation yet -> null
        assertNull(transport.getServerEncryptionKey());

        // SMB1 negotiation with server data