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#!/usr/bin/perl
# Exercise expand.
# Copyright (C) 2004-2016 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 <http://www.gnu.org/licenses/>.
use strict;
my $limits = getlimits ();
my $UINTMAX_OFLOW = $limits->{UINTMAX_OFLOW};
(my $program_name = $0) =~ s|.*/||;
my $prog = 'expand';
# Turn off localization of executable's output.
@ENV{qw(LANGUAGE LANG LC_ALL)} = ('C') x 3;
my @Tests =
(
['t1', '--tabs=3', {IN=>"a\tb"}, {OUT=>"a b"}],
['t2', '--tabs=3,6,9', {IN=>"a\tb\tc\td\te"}, {OUT=>"a b c d e"}],
['t3', '--tabs="3 6 9"', {IN=>"a\tb\tc\td\te"}, {OUT=>"a b c d e"}],
# Leading space/commas are silently ignored; Mixing space/commas is allowed.
# (a side-effect of allowing direct "-3,9" parameter).
['t4', '--tabs=", 3,6 9"', {IN=>"a\tb\tc\td\te"}, {OUT=>"a b c d e"}],
# tab stops parameter without values
['t5', '--tabs=""', {IN=>"a\tb\tc"}, {OUT=>"a b c"}],
['t6', '--tabs=","', {IN=>"a\tb\tc"}, {OUT=>"a b c"}],
['t7', '--tabs=" "', {IN=>"a\tb\tc"}, {OUT=>"a b c"}],
# Input field wider than the specified tab list
['t8', '--tabs=6,9', {IN=>"a\tbbbbbbbbbbbbb\tc"},
{OUT=>"a bbbbbbbbbbbbb c"}],
['i1', '--tabs=3 -i', {IN=>"\ta\tb"}, {OUT=>" a\tb"}],
['i2', '--tabs=3 -i', {IN=>" \ta\tb"}, {OUT=>" a\tb"}],
# Undocumented feature:
# treat "expand -7" as "expand --tabs 7" ,
# and "expand -90" as "expand --tabs 90",
['u1', '-3', {IN=>"a\tb\tc"}, {OUT=>"a b c"}],
['u2', '-4 -9', {IN=>"a\tb\tc"}, {OUT=>"a b c"}],
['u3', '-11', {IN=>"a\tb\tc"}, {OUT=>"a b c"}],
# Test all digits (for full code coverage)
['u4', '-2 -6', {IN=>"a\tb\tc"}, {OUT=>"a b c"}],
['u5', '-7', {IN=>"a\tb"}, {OUT=>"a b"}],
['u6', '-8', {IN=>"a\tb"}, {OUT=>"a b"}],
# This syntax is handled internally as "-3, -9"
['u7', '-3,9', {IN=>"a\tb\tc"}, {OUT=>"a b c"}],
# Multiple non-empty files
['f1', '--tabs=4',
{IN=>{"in1" => "a\tb\n"}}, {IN=>{"in2" => "c\td\n"}},
{OUT=>"a b\nc d\n"}],
# Multiple files, first file is empty
['f2', '--tabs=4',
{IN=>{"in1" => ""}}, {IN=>{"in2" => "c\td\n"}},
{OUT=>"c d\n"}],
# Multiple files, second file is empty
['f3', '--tabs=4',
{IN=>{"in1" => "a\tb\n"}}, {IN=>{"in2" => ""}},
{OUT=>"a b\n"}],
# Test '\b' (back-space) - subtract one column.
#
# Note:
# In a terminal window, 'expand' will appear to erase the 'a' characters
# due to overwriting them with spaces:
#
# $ printf 'aaa\b\b\bc\td\n'
# caa d
# $ printf 'aaa\b\b\bc\td\n' | expand
# c d
#
# However the characters are all printed:
#
# $ printf 'aaa\b\b\bc\td\n' | expand | od -An -ta
# a a a bs bs bs c sp sp sp sp sp sp sp d nl
#
# If users ever report a problem with these tests and just
# copy&paste from the terminal, their report will be confusing
# (the 'a' will not appear).
#
# To see an example, enable the 'b-confusing' test, and examine the
# reported log:
#
# expand.pl: test b-confusing: stdout mismatch
# *** b-confusing.2 Fri Jun 24 15:43:21 2016
# --- b-confusing.O Fri Jun 24 15:43:21 2016
# ***************
# *** 1 ****
# ! c d
# --- 1 ----
# ! c d
#
# ['b-confusing','', {IN=>"aaa\b\b\bc\td\n"}, {OUT=>"c d\n"}],
['b1','', {IN=>"aaa\b\b\bc\td\n"}, {OUT=>"aaa\b\b\bc d\n"}],
# \b as first character, when column is zero
['b2','', {IN=>"\bc\td"}, {OUT=>"\bc d"}],
# Testing tab list adjusted due to backspaces
# ('b3' is the baseline without backspaces).
['b3','--tabs 2,4,6,10',
{IN=>"1\t2\t3\t4\t5\n" .
"a\tb\tc\td\te\n"},
{OUT=>"1 2 3 4 5\n" .
"a b c d e\n"}],
# On screen this will appear the same as 'b3'
['b4','--tabs 2,4,6,10',
{IN=>"1\t2\t3\t4\t5\n" .
"a\tbHELLO\b\b\b\b\b\tc\td\te\n"},
{OUT=>"1 2 3 4 5\n" .
"a bHELLO\b\b\b\b\b c d e\n"}],
# On screen on 'bHE' will appear (LLO overwritten by spaces),
# 'c' should align with 4, 'd' with 5:
# 1 2 3 4 5
# a bHE c d e
['b5','--tabs 2,4,6,10',
{IN=>"1\t2\t3\t4\t5\n" .
"a\tbHELLO\b\b\b\tc\td\te\n"},
{OUT=>"1 2 3 4 5\n" .
"a bHELLO\b\b\b c d e\n"}],
# Test errors
['e1', '--tabs="a"', {IN=>''}, {OUT=>''}, {EXIT=>1},
{ERR => "$prog: tab size contains invalid character(s): 'a'\n"}],
['e2', "-t $UINTMAX_OFLOW", {IN=>''}, {OUT=>''}, {EXIT=>1},
{ERR => "$prog: tab stop is too large '$UINTMAX_OFLOW'\n"}],
['e3', '--tabs=0', {IN=>''}, {OUT=>''}, {EXIT=>1},
{ERR => "$prog: tab size cannot be 0\n"}],
['e4', '--tabs=3,3', {IN=>''}, {OUT=>''}, {EXIT=>1},
{ERR => "$prog: tab sizes must be ascending\n"}],
);
my $save_temps = $ENV{DEBUG};
my $verbose = $ENV{VERBOSE};
my $fail = run_tests ($program_name, $prog, \@Tests, $save_temps, $verbose);
exit $fail;
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