1 files changed, 68 insertions, 0 deletions
diff --git a/tests/misc/shuf b/tests/misc/shuf
new file mode 100755
index 0000000..a2d5891
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+++ b/tests/misc/shuf
@@ -0,0 +1,68 @@
+#!/bin/sh
+# Ensure that shuf randomizes its input.
+
+# Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.
+
+if test "$VERBOSE" = yes; then
+  set -x
+  shuf --version
+fi
+
+pwd=`pwd`
+t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$
+trap 'status=$?; cd "$pwd" && chmod -R u+rwx $t0 && rm -rf $t0 && exit $status' 0
+trap '(exit $?); exit $?' 1 2 13 15
+
+framework_failure=0
+mkdir -p $tmp || framework_failure=1
+cd $tmp || framework_failure=1
+seq 100 > in || framework_failure=1
+
+if test $framework_failure = 1; then
+  echo "$0: failure in testing framework" 1>&2
+  (exit 1); exit 1
+fi
+
+fail=0
+
+shuf in >out || fail=1
+
+# Fail if the input is the same as the output.
+# This is a probabilistic test :-)
+# However, the odds of failure are very low: 1 in 100! (~ 1 in 10^158)
+cmp in out > /dev/null && { fail=1; echo "not random?" 1>&2; }
+
+# Fail if the sorted output is not the same as the input.
+sort -n out > out1
+cmp in out1 || { fail=1; echo "not a permutation" 1>&2; }
+
+# Exercise shuf's -i option.
+shuf -i 1-100 > out || fail=1
+cmp in out > /dev/null && { fail=1; echo "not random?" 1>&2; }
+sort -n out > out1
+cmp in out1 || { fail=1; echo "not a permutation" 1>&2; }
+
+# Exercise shuf's -e option.
+t=`shuf -e a b c d e | sort | fmt`
+test "$t" = 'a b c d e' || { fail=1; echo "not a permutation" 1>&2; }
+
+# Before coreutils-6.3, this would infloop.
+# "seq 1860" produces 8193 (8K + 1) bytes of output.
+seq 1860 | shuf > /dev/null || fail=1
+
+(exit $fail); exit $fail