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-rwxr-xr-xtests/misc/unexpand.pl135
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diff --git a/tests/misc/unexpand.pl b/tests/misc/unexpand.pl
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+#!/usr/bin/perl
+# Test "unexpand".
+
+# Copyright (C) 2000-2020 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 3 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, see <https://www.gnu.org/licenses/>.
+
+use strict;
+
+my $limits = getlimits ();
+
+(my $program_name = $0) =~ s|.*/||;
+
+# Turn off localization of executable's output.
+@ENV{qw(LANGUAGE LANG LC_ALL)} = ('C') x 3;
+
+my $prog = 'unexpand';
+
+my @Tests =
+ (
+ ['a1', {IN=> ' 'x 1 ."y\n"}, {OUT=> ' 'x 1 ."y\n"}],
+ ['a2', {IN=> ' 'x 2 ."y\n"}, {OUT=> ' 'x 2 ."y\n"}],
+ ['a3', {IN=> ' 'x 3 ."y\n"}, {OUT=> ' 'x 3 ."y\n"}],
+ ['a4', {IN=> ' 'x 4 ."y\n"}, {OUT=> ' 'x 4 ."y\n"}],
+ ['a5', {IN=> ' 'x 5 ."y\n"}, {OUT=> ' 'x 5 ."y\n"}],
+ ['a6', {IN=> ' 'x 6 ."y\n"}, {OUT=> ' 'x 6 ."y\n"}],
+ ['a7', {IN=> ' 'x 7 ."y\n"}, {OUT=> ' 'x 7 ."y\n"}],
+ ['a8', {IN=> ' 'x 8 ."y\n"}, {OUT=> "\ty\n"}],
+
+ ['aa-1', '-a', {IN=> 'w'.' 'x 1 ."y\n"}, {OUT=> 'w'.' 'x 1 ."y\n"}],
+ ['aa-2', '-a', {IN=> 'w'.' 'x 2 ."y\n"}, {OUT=> 'w'.' 'x 2 ."y\n"}],
+ ['aa-3', '-a', {IN=> 'w'.' 'x 3 ."y\n"}, {OUT=> 'w'.' 'x 3 ."y\n"}],
+ ['aa-4', '-a', {IN=> 'w'.' 'x 4 ."y\n"}, {OUT=> 'w'.' 'x 4 ."y\n"}],
+ ['aa-5', '-a', {IN=> 'w'.' 'x 5 ."y\n"}, {OUT=> 'w'.' 'x 5 ."y\n"}],
+ ['aa-6', '-a', {IN=> 'w'.' 'x 6 ."y\n"}, {OUT=> 'w'.' 'x 6 ."y\n"}],
+ ['aa-7', '-a', {IN=> 'w'.' 'x 7 ."y\n"}, {OUT=> "w\ty\n"}],
+ ['aa-8', '-a', {IN=> 'w'.' 'x 8 ."y\n"}, {OUT=> "w\t y\n"}],
+
+ ['b-1', '-t', '2,4', {IN=> " ."}, {OUT=>"\t\t ."}],
+ # These would infloop prior to textutils-2.0d.
+
+ ['infloop-1', '-t', '1,2', {IN=> " \t\t .\n"}, {OUT=>"\t\t\t .\n"}],
+ ['infloop-2', '-t', '4,5', {IN=> ' 'x4 . "\t\t \n"}, {OUT=>"\t\t\t \n"}],
+ ['infloop-3', '-t', '2,3', {IN=> "x \t\t \n"}, {OUT=>"x\t\t\t \n"}],
+ ['infloop-4', '-t', '1,2', {IN=> " \t\t \n"}, {OUT=>"\t\t\t \n"}],
+ ['c-1', '-t', '1,2', {IN=> "x\t\t .\n"}, {OUT=>"x\t\t .\n"}],
+
+ # -t implies -a
+ # Feature addition (--first-only) prompted by a report from Jie Xu.
+ ['tabs-1', qw(-t 3), {IN=> " a b\n"}, {OUT=>"\ta\tb\n"}],
+ ['tabs-2', qw(-t 3 --first-only), {IN=> " a b\n"}, {OUT=>"\ta b\n"}],
+
+ # blanks
+ ['blanks-1', qw(-t 1), {IN=> " b c d\n"}, {OUT=> "\tb\t\tc\t\t\td\n"}],
+ ['blanks-2', qw(-t 1), {IN=> "a \n"}, {OUT=> "a \n"}],
+ ['blanks-3', qw(-t 1), {IN=> "a \n"}, {OUT=> "a\t\t\n"}],
+ ['blanks-4', qw(-t 1), {IN=> "a \n"}, {OUT=> "a\t\t\t\n"}],
+ ['blanks-5', qw(-t 1), {IN=> "a "}, {OUT=> "a "}],
+ ['blanks-6', qw(-t 1), {IN=> "a "}, {OUT=> "a\t\t"}],
+ ['blanks-7', qw(-t 1), {IN=> "a "}, {OUT=> "a\t\t\t"}],
+ ['blanks-8', qw(-t 1), {IN=> " a a a\n"}, {OUT=> "\ta a\t\ta\n"}],
+ ['blanks-9', qw(-t 2), {IN=> " a a a\n"}, {OUT=> "\t a\ta\t a\n"}],
+ ['blanks-10', '-t', '3,4', {IN=> "0 2 4 6\t8\n"}, {OUT=> "0 2 4 6\t8\n"}],
+ ['blanks-11', '-t', '3,4', {IN=> " 4\n"}, {OUT=> "\t\t4\n"}],
+ ['blanks-12', '-t', '3,4', {IN=> "01 4\n"}, {OUT=> "01\t\t4\n"}],
+ ['blanks-13', '-t', '3,4', {IN=> "0 4\n"}, {OUT=> "0\t\t4\n"}],
+
+ # POSIX says spaces should only follow tabs. Also a single
+ # trailing space is not converted to a tab, when before
+ # a field starting with non blanks
+ ['posix-1', '-a', {IN=> "1234567 \t1\n"}, {OUT=>"1234567\t\t1\n"}],
+ ['posix-2', '-a', {IN=> "1234567 \t1\n"}, {OUT=>"1234567\t\t1\n"}],
+ ['posix-3', '-a', {IN=> "1234567 \t1\n"}, {OUT=>"1234567\t\t1\n"}],
+ ['posix-4', '-a', {IN=> "1234567\t1\n"}, {OUT=>"1234567\t1\n"}],
+ ['posix-5', '-a', {IN=> "1234567 1\n"}, {OUT=>"1234567\t 1\n"}],
+ ['posix-6', '-a', {IN=> "1234567 1\n"}, {OUT=>"1234567 1\n"}],
+
+ # It is debatable whether this test should require an environment
+ # setting of e.g., _POSIX2_VERSION=1.
+ ['obs-ovflo', "-$limits->{UINTMAX_OFLOW}", {IN=>''}, {OUT=>''},
+ {EXIT => 1}, {ERR => "$prog: tab stop value is too large\n"}],
+
+
+ # Test input with backspaces '\b' ('bs1' is the baseline, without \b)
+ # Note: If users report errors in these tests, copy&pasting results from
+ # their terminate output might be confusing due to '\b' overriding
+ # characters. For details see '\b' tests in 'expand.pl'.
+ ['bs1', '-a -t4', {IN=>"aa c\n"}, {OUT=>"aa\tc\n"}],
+ ['bs2', '-a -t4', {IN=>"aa\b c\n"}, {OUT=>"aa\b c\n"}],
+ ['bs3', '-a -t4', {IN=>"aa\b c\n"}, {OUT=>"aa\b\tc\n"}],
+ ['bs4', '-a -t3', {IN=>"aa\b c\n"}, {OUT=>"aa\b\tc\n"}],
+
+ # Undocumented feature:
+ # treat "unexpand -7" as "unexpand --first-only --tabs 7" ,
+ # and "unexpand -90" as "unexpand --first-only --tabs 90",
+ ['u1', '-a -3', {IN=>"a b c"}, {OUT=>"a\tb\tc"}],
+ ['u2', '-a -4,9', {IN=>"a b c"}, {OUT=>"a\tb\tc"}],
+ ['u3', '-a -11', {IN=>"a b"}, {OUT=>"a\tb"}],
+ # Test all digits (for full code coverage)
+ ['u4', '-a -2,6', {IN=>"a b c"}, {OUT=>"a b\tc"}],
+ ['u5', '-a -7', {IN=>"a b"}, {OUT=>"a\tb"}],
+ ['u6', '-a -8', {IN=>"a b"}, {OUT=>"a\tb"}],
+ # This syntax is handled internally as "-3, -9"
+ ['u7', '-a -3,9', {IN=>"a b c"}, {OUT=>"a\tb\tc"}],
+ # Default (without -a) is --first-only:
+ ['u8', '-3', {IN=>" a b"}, {OUT=>"\ta b"}],
+
+ # Arguably this should minimize translation as is done on Solaris.
+ # I.e., not modify the input. But since the result is equivalent,
+ # and to be consistent in output with older versions, we output
+ # a '\t' rather than a space for the second tab position.
+ # For more detailed comparison with other implementations see:
+ # https://lists.gnu.org/r/coreutils/2016-06/msg00015.html
+ # https://lists.gnu.org/r/coreutils/2016-07/msg00011.html
+ ['ts1', '-t8,9', {IN=>"x\t \t y\n"}, {OUT=>"x\t\t\t y\n"}],
+ # There is no ambiguity here. This should always be the output.
+ ['ts2', '-t5,8', {IN=>"x\t \t y\n"}, {OUT=>"x\t\t y\n"}],
+ );
+
+my $save_temps = $ENV{DEBUG};
+my $verbose = $ENV{VERBOSE};
+
+my $fail = run_tests ($program_name, $prog, \@Tests, $save_temps, $verbose);
+exit $fail;