golang/libnbd_410_pwrite_test.go

   1 /* libnbd golang tests
   2  * Copyright Red Hat
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 package libnbd
  20
  21 import "bytes"
  22 import "testing"
  23
  24 func Test410PWrite(t *testing.T) {
  25         h, err := Create()
  26         if err != nil {
  27                 t.Fatalf("could not create handle: %s", err)
  28         }
  29         defer h.Close()
  30
  31         err = h.ConnectCommand([]string{
  32                 "nbdkit", "-s", "--exit-with-parent", "-v",
  33                 "memory", "size=512",
  34         })
  35         if err != nil {
  36                 t.Fatalf("could not connect: %s", err)
  37         }
  38
  39         /* Write a pattern and read it back. */
  40         buf := make([]byte, 512)
  41         for i := 0; i < 512; i += 2 {
  42                 buf[i] = 0x55
  43                 buf[i+1] = 0xAA
  44         }
  45         err = h.Pwrite(buf, 0, nil)
  46         if err != nil {
  47                 t.Fatalf("%s", err)
  48         }
  49         buf2 := make([]byte, 512)
  50         err = h.Pread(buf2, 0, nil)
  51         if err != nil {
  52                 t.Fatalf("%s", err)
  53         }
  54
  55         if !bytes.Equal(buf, buf2) {
  56                 t.Fatalf("did not read back same data as written")
  57         }
  58 }