tests/test-data-random-slice.sh

   1 #!/usr/bin/env bash
   2 # nbdkit
   3 # Copyright (C) 2018-2020 Red Hat Inc.
   4 #
   5 # Redistribution and use in source and binary forms, with or without
   6 # modification, are permitted provided that the following conditions are
   7 # met:
   8 #
   9 # * Redistributions of source code must retain the above copyright
  10 # notice, this list of conditions and the following disclaimer.
  11 #
  12 # * Redistributions in binary form must reproduce the above copyright
  13 # notice, this list of conditions and the following disclaimer in the
  14 # documentation and/or other materials provided with the distribution.
  15 #
  16 # * Neither the name of Red Hat nor the names of its contributors may be
  17 # used to endorse or promote products derived from this software without
  18 # specific prior written permission.
  19 #
  20 # THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
  21 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22 # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  23 # PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
  24 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  27 # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  28 # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  29 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  30 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31 # SUCH DAMAGE.
  32
  33 # Test the data plugin with </dev/urandom[N:M]
  34
  35 source ./functions.sh
  36 set -e
  37 set -x
  38
  39 requires_nbdsh_uri
  40 requires test -r /dev/urandom
  41
  42 sock=$(mktemp -u /tmp/nbdkit-test-sock.XXXXXX)
  43 files="data-random-slice.pid $sock"
  44 rm -f $files
  45 cleanup_fn rm -f $files
  46
  47 # Run nbdkit.
  48 start_nbdkit -P data-random-slice.pid -U $sock \
  49        data '
  50 </dev/urandom[:4]*4
  51 '
  52
  53 nbdsh --connect "nbd+unix://?socket=$sock" \
  54       -c '
  55 print("%d" % h.get_size())
  56 assert h.get_size() == 4*4
  57
  58 # We do not know what the content will be but it must
  59 # be the same 4 bytes repeated 4 times.
  60 buf1 = h.pread(4, 0)
  61 buf2 = h.pread(4, 4)
  62 buf3 = h.pread(4, 8)
  63 buf4 = h.pread(4, 12)
  64
  65 assert buf1 == buf2
  66 assert buf2 == buf3
  67 assert buf3 == buf4
  68 '