if (host == null || host.isEmpty()) {
                throw new SmbException("SMB URL missing host");
            }

            // Validate host format
            if (!isValidHost(host)) {
                throw new SmbException("Invalid host in SMB URL");
            }

            // Validate path component
            String path = url.getPath();

    void testDefaultPort(int invalidPort) throws Exception {
        // Given: Create a new pool for this test to ensure isolation
        SmbTransportPoolImpl testPool = new SmbTransportPoolImpl();
        when(ctx.getTransportPool()).thenReturn(testPool);

        // Connection with invalid port
        SmbTransportImpl first = testPool.getSmbTransport(ctx, address, invalidPort, false);