1 files changed, 43 insertions, 0 deletions
diff --git a/tests/tsort/basic-1 b/tests/tsort/basic-1
new file mode 100755
index 000000000..81297d11c
--- /dev/null
+++ b/tests/tsort/basic-1
@@ -0,0 +1,43 @@
+#!/bin/sh
+
+: ${PERL=perl}
+: ${srcdir=.}
+
+case "$PERL" in
+  *'missing perl')
+  echo 1>&2 "$0: configure didn't find a usable version of Perl, so can't run this test"
+  exit 77
+  ;;
+esac
+#'
+
+exec $PERL -w -I$srcdir/.. -MFetish -- - <<\EOF
+#/
+require 5.003;
+use strict;
+
+(my $program_name = $0) =~ s|.*/||;
+
+# Turn off localisation of executable's ouput.
+@ENV{qw(LANGUAGE LANG LC_ALL)} = ('C') x 3;
+
+my @Tests =
+  (
+   ['cycle-1', {IN => {f => "t b\nt s\ns t\n"}}, {OUT => ''}, {EXIT => 1},
+    {ERR => "tsort: f: input contains a loop:\ntsort: s\ntsort: t\n"} ],
+   ['cycle-2', {IN => {f => "t x\nt s\ns t\n"}}, {OUT => ''}, {EXIT => 1},
+    {ERR => "tsort: f: input contains a loop:\ntsort: s\ntsort: t\n"} ],
+
+   ['posix-1', {IN => "a b c c d e\ng g\nf g e f\nh h\n"},
+    {OUT => "a\nc\nd\nh\nb\ne\nf\ng\n"}],
+   ['posix-2', {IN => "b a\nd c\nz h x h r h\n"},
+    {OUT => "b\nd\nr\nx\nz\na\nc\nh\n"}],
+  );
+
+my $save_temps = $ENV{DEBUG};
+my $verbose = $ENV{VERBOSE};
+
+my $prog = $ENV{PROG} || die "$0: \$PROG not specified in environment\n";
+my $fail = run_tests ($program_name, $prog, \@Tests, $save_temps, $verbose);
+exit $fail;
+EOF