}

    /**
     * Test that a RuntimeCIFSException is thrown when the handshake fails due to an underlying exception.
     * @throws IOException
     */
    @Test
    void testHandshakeThrowsRuntimeExceptionOnFailure() throws Exception {
        // Arrange
        when(mockConnection.getHeaderField(0)).thenThrow(new RuntimeException("Connection failed"));
        doNothing().when(mockConnection).connect();