2 # Ensure that shuf randomizes its input.
4 # Copyright (C) 2006, 2007 Free Software Foundation, Inc.
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 if test "$VERBOSE" = yes; then
27 t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$
28 trap 'status=$?; cd "$pwd" && chmod -R u+rwx $t0 && rm -rf $t0 && exit $status' 0
29 trap '(exit $?); exit $?' 1 2 13 15
32 mkdir -p $tmp || framework_failure=1
33 cd $tmp || framework_failure=1
34 seq 100 > in || framework_failure=1
36 if test $framework_failure = 1; then
37 echo "$0: failure in testing framework" 1>&2
43 shuf in >out || fail=1
45 # Fail if the input is the same as the output.
46 # This is a probabilistic test :-)
47 # However, the odds of failure are very low: 1 in 100! (~ 1 in 10^158)
48 cmp in out > /dev/null && { fail=1; echo "not random?" 1>&2; }
50 # Fail if the sorted output is not the same as the input.
52 cmp in out1 || { fail=1; echo "not a permutation" 1>&2; }
54 # Exercise shuf's -i option.
55 shuf -i 1-100 > out || fail=1
56 cmp in out > /dev/null && { fail=1; echo "not random?" 1>&2; }
58 cmp in out1 || { fail=1; echo "not a permutation" 1>&2; }
60 # Exercise shuf's -e option.
61 t=`shuf -e a b c d e | sort | fmt`
62 test "$t" = 'a b c d e' || { fail=1; echo "not a permutation" 1>&2; }
64 # Before coreutils-6.3, this would infloop.
65 # "seq 1860" produces 8193 (8K + 1) bytes of output.
66 seq 1860 | shuf > /dev/null || fail=1
68 (exit $fail); exit $fail