// Register the SMB protocol handler
        String pkgs = System.getProperty("java.protocol.handler.pkgs");
        if (pkgs == null) {
            System.setProperty("java.protocol.handler.pkgs", "jcifs.smb1");
        } else if (!pkgs.contains("jcifs.smb1")) {
            System.setProperty("java.protocol.handler.pkgs", pkgs + "|jcifs.smb1");
        }
    }

    @Test

        SingletonContext.getInstance();
        String pkgs = System.getProperty("java.protocol.handler.pkgs");
        if (pkgs == null) {
            System.setProperty("java.protocol.handler.pkgs", "jcifs");
        } else if (pkgs.indexOf("jcifs") == -1) {
            pkgs += "|jcifs";
            System.setProperty("java.protocol.handler.pkgs", pkgs);
        }
    }

    /**
     *
     */

        System.clearProperty("java.protocol.handler.pkgs");
        SingletonContext.registerSmbURLHandler();
        assertEquals("jcifs", System.getProperty("java.protocol.handler.pkgs"));
    }

    @Test
    void testRegisterSmbURLHandlerWhenPkgsDoesNotContainJcifs() {
        // Test registerSmbURLHandler when java.protocol.handler.pkgs does not contain "jcifs"

    private static final Map<String, URLStreamHandler> PROTOCOL_HANDLERS = new HashMap<>();

    private static final String HANDLER_PKGS_PROPERTY = "java.protocol.handler.pkgs";

    /**
     * Vendor-specific default packages. If no packages are specified in
     * "java.protocol.handler.pkgs", the VM uses one or more default
     * packages, which are vendor specific. Sun's is included below

        if (StringUtil.isEmpty(value)) {
            buf.append("org.codelibs.fess.net.protocol");
        } else if (!value.contains("org.codelibs.fess.net.protocol")) {
            buf.append("|org.codelibs.fess.net.protocol");
        }
        if (buf.length() > 0) {
            System.setProperty("java.protocol.handler.pkgs", buf.toString());
        }
    }

    }

    private static final Map PROTOCOL_HANDLERS = new HashMap();

    private static final String HANDLER_PKGS_PROPERTY = "java.protocol.handler.pkgs";

    /**
     * Vendor-specific default packages.  If no packages are specified in
     * "java.protocol.handler.pkgs", the VM uses one or more default
     * packages, which are vendor specific.  Sun's is included below

pkg p1, type URL struct
pkg p1, var Byte uint8
pkg p1, var ByteConv []uint8
pkg p1, var ByteFunc func(uint8) int32
pkg p1, var ChecksumError error
pkg p1, var SIPtr *SI
pkg p1, var SIPtr2 *SI
pkg p1, var SIVal SI
pkg p1, var StrConv string
pkg p1, var V string
pkg p1, var V1 uint64
pkg p1, var V2 p2.Twoer
pkg p1, var VError //deprecated
pkg p1, var VError Error
pkg p1, var X I
pkg p1, var X0 int64

pkg debug/pe, const IMAGE_FILE_DLL = 8192
pkg debug/pe, const IMAGE_FILE_DLL ideal-int
pkg debug/pe, const IMAGE_FILE_EXECUTABLE_IMAGE = 2
pkg debug/pe, const IMAGE_FILE_EXECUTABLE_IMAGE ideal-int
pkg debug/pe, const IMAGE_FILE_LARGE_ADDRESS_AWARE = 32
pkg debug/pe, const IMAGE_FILE_LARGE_ADDRESS_AWARE ideal-int
pkg debug/pe, const IMAGE_FILE_LINE_NUMS_STRIPPED = 4
pkg debug/pe, const IMAGE_FILE_LINE_NUMS_STRIPPED ideal-int

pkg p2, func F //deprecated
pkg p2, func F() string
pkg p2, func G() Twoer
pkg p2, func NewError(string) error
pkg p2, type Twoer interface { PackageTwoMeth }
pkg p2, type Twoer interface, PackageTwoMeth //deprecated

pkg log/slog, func NewMultiHandler(...Handler) *MultiHandler #65954
pkg log/slog, method (*MultiHandler) Enabled(context.Context, Level) bool #65954
pkg log/slog, method (*MultiHandler) Handle(context.Context, Record) error #65954
pkg log/slog, method (*MultiHandler) WithAttrs([]Attr) Handler #65954
pkg log/slog, method (*MultiHandler) WithGroup(string) Handler #65954