// Try providers in order of preference
        List<RdmaProvider> providers = Arrays.asList(new DisniRdmaProvider(), // InfiniBand/RoCE - highest performance
                new TcpRdmaProvider() // TCP fallback - always available
        );

        for (RdmaProvider provider : providers) {
            if (provider.isAvailable()) {
                log.info("Selected RDMA provider: {}", provider.getProviderName());

        assertNotNull(firstName, "First called name should not be null");
    }

    @Test
    @DisplayName("nextCalledName should return valid name for fallback attempts")
    void testNextCalledNameContract() {
        // Given
        String expectedNextName = "SERVER15";
        when(mockAddress.nextCalledName(mockContext)).thenReturn(expectedNextName);

        // When

        // Test cleanup
        region.close();
        assertFalse(region.isValid(), "Region should be invalid after close");
    }

    @Test
    public void testGetProviderName() {
        assertEquals("TCP Fallback", provider.getProviderName());
    }

    @Test
    public void testGetMaxMessageSize() {
        assertEquals(65536, provider.getMaxMessageSize(), "TCP provider should have 64KB limit");
    }

    @Test

	}

	if sqlTx, ok := tx.Statement.ConnPool.(gorm.TxCommitter); !ok || sqlTx == nil {
		t.Fatalf("Should return the underlying sql.Tx")
	}

	tx.Rollback()

	if err = db.First(&User{}, "name = ?", "transaction").Error; err == nil {
		t.Fatalf("Should not find record after rollback, but got %v", err)
	}

	txDB := db.Where("fake_name = ?", "fake_name")
	tx2 := txDB.Session(&gorm.Session{NewDB: true}).Begin()

            // we called sizeIfKnown and when we started reading the file (or I guess if
            // maxCharsPerByte is wrong)
            // Fallback to an incremental approach
            StringBuilder builder = new StringBuilder(bufIndex + 32);
            builder.append(buffer, 0, bufIndex);
            buffer = null; // release for gc

type ConnPoolBeginner interface {
	BeginTx(ctx context.Context, opts *sql.TxOptions) (ConnPool, error)
}

// TxCommitter tx committer
type TxCommitter interface {
	Commit() error
	Rollback() error
}

// Tx sql.Tx interface
type Tx interface {
	ConnPool
	TxCommitter
	StmtContext(ctx context.Context, stmt *sql.Stmt) *sql.Stmt
}

// Valuer gorm valuer interface
type Valuer interface {

        }
    }

    @Test
    void testConstructor_FallbackToConnect2() throws IOException {
        // Test case: Constructor with DCERPC_FAULT_OP_RNG_ERROR, should fallback to MsrpcSamrConnect2
        String server = "testServer";
        int access = 123;

        // Simulate DCERPC_FAULT_OP_RNG_ERROR for MsrpcSamrConnect4
        doThrow(new DcerpcException("Operation range error") {

		if err != nil {
			return err
		}
		boff += consumed
		if len(name) == 0 || bytes.Equal(name, []byte{'.'}) || bytes.Equal(name, []byte{'.', '.'}) {
			continue
		}

		// Fallback for filesystems (like old XFS) that don't
		// support Dirent.Type and have DT_UNKNOWN (0) there
		// instead.
		if typ == unexpectedFileMode || typ&os.ModeSymlink == os.ModeSymlink {

	"errors"

	"gorm.io/gorm/logger"
)

var (
	// ErrRecordNotFound record not found error
	ErrRecordNotFound = logger.ErrRecordNotFound
	// ErrInvalidTransaction invalid transaction when you are trying to `Commit` or `Rollback`
	ErrInvalidTransaction = errors.New("invalid transaction")
	// ErrNotImplemented not implemented
	ErrNotImplemented = errors.New("not implemented")
	// ErrMissingWhereClause missing where clause

            // Positive values not in DOS_ERROR_CODES map to NT_STATUS_UNSUCCESSFUL
            expected = NtStatus.NT_STATUS_UNSUCCESSFUL;
        }
        assertEquals(expected, ex.getNtStatus(), "Status should match mapping or fallback");
    }

    /**
     * Verify that root causes are stored and returned correctly.
     */
    @Test
    @DisplayName("Root cause propagation")
    void testRootCausePropagation() {