1#!/usr/bin/perl
2# Test "tsort".
3
4# Copyright (C) 1999-2023 Free Software Foundation, Inc.
5
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 3 of the License, or
9# (at your option) any later version.
10
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.
15
16# You should have received a copy of the GNU General Public License
17# along with this program.  If not, see <https://www.gnu.org/licenses/>.
18
19use strict;
20
21(my $program_name = $0) =~ s|.*/||;
22
23# Turn off localization of executable's output.
24@ENV{qw(LANGUAGE LANG LC_ALL)} = ('C') x 3;
25
26my @Tests =
27  (
28   ['cycle-1', {IN => {f => "t b\nt s\ns t\n"}}, {OUT => "s\nt\nb\n"},
29    {EXIT => 1},
30    {ERR => "tsort: f: input contains a loop:\ntsort: s\ntsort: t\n"} ],
31   ['cycle-2', {IN => {f => "t x\nt s\ns t\n"}}, {OUT => "s\nt\nx\n"},
32    {EXIT => 1},
33    {ERR => "tsort: f: input contains a loop:\ntsort: s\ntsort: t\n"} ],
34
35   ['posix-1', {IN => "a b c c d e\ng g\nf g e f\nh h\n"},
36    {OUT => "a\nc\nd\nh\nb\ne\nf\ng\n"}],
37   ['posix-2', {IN => "b a\nd c\nz h x h r h\n"},
38    {OUT => "b\nd\nr\nx\nz\na\nc\nh\n"}],
39
40   ['linear-1', {IN => "a b b c c d d e e f f g\n"},
41    {OUT => "a\nb\nc\nd\ne\nf\ng\n"}],
42
43   ['tree-1', {IN => "a b b c c d d e e f f g\nc x x y y z\n"},
44    {OUT => "a\nb\nc\nx\nd\ny\ne\nz\nf\ng\n"}],
45   ['tree-2', {IN => "a b b c c d d e e f f g\nc x x y y z\nf r r s s t\n"},
46    {OUT => "a\nb\nc\nx\nd\ny\ne\nz\nf\nr\ng\ns\nt\n"}],
47
48   # Before coreutils-5.0.1, given an odd number of input tokens,
49   # tsort would accept that and treat the input as if an additional
50   # copy of the final token were appended.
51   ['odd', {IN => "a\n"},
52    {EXIT => 1},
53    {ERR => "tsort: odd.1: input contains an odd number of tokens\n"}],
54
55   ['only-one', {IN => {f => ""}}, {IN => {g => ""}},
56    {EXIT => 1},
57    {ERR => "tsort: extra operand 'g'\n"
58     . "Try 'tsort --help' for more information.\n"}],
59  );
60
61my $save_temps = $ENV{DEBUG};
62my $verbose = $ENV{VERBOSE};
63
64my $prog = 'tsort';
65my $fail = run_tests ($program_name, $prog, \@Tests, $save_temps, $verbose);
66exit $fail;
67