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Diffstat (limited to 'tests/misc/head-elide-tail.pl')
| -rwxr-xr-x | tests/misc/head-elide-tail.pl | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/tests/misc/head-elide-tail.pl b/tests/misc/head-elide-tail.pl new file mode 100755 index 000000000..85f509d26 --- /dev/null +++ b/tests/misc/head-elide-tail.pl @@ -0,0 +1,107 @@ +#!/usr/bin/perl +# Exercise head's --bytes=-N option. + +# Copyright (C) 2003-2012 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 $program_name = $0) =~ s|.*/||; + +$ENV{PROG} = 'head'; + +# Turn off localization of executable's output. +@ENV{qw(LANGUAGE LANG LC_ALL)} = ('C') x 3; + +# This should match the definition in head.c. +my $READ_BUFSIZE = 8192; + +my @Tests = + ( + # Elide the exact size of the file. + ['elide-b1', "--bytes=-2", {IN=>"a\n"}, {OUT=>''}], + # Elide more than the size of the file. + ['elide-b2', "--bytes=-2", {IN=>"a"}, {OUT=>''}], + # Leave just one byte. + ['elide-b3', "--bytes=-2", {IN=>"abc"}, {OUT=>'a'}], + # Make it so the elided bytes straddle the end of the first + # $READ_BUFSIZE block. + ['elide-b4', "--bytes=-2", + {IN=> 'a' x ($READ_BUFSIZE-3) . "\nbcd"}, + {OUT=>'a' x ($READ_BUFSIZE-3) . "\nb"}], + # Make it so the elided bytes straddle the end of the 2nd + # $READ_BUFSIZE block. + ['elide-b5', "--bytes=-2", + {IN=> 'a' x (2 * $READ_BUFSIZE - 2) . 'bcd'}, + {OUT=>'a' x (2 * $READ_BUFSIZE - 2) . 'b'}], + + ['elide-l0', "--lines=-1", {IN=>''}, {OUT=>''}], + ['elide-l1', "--lines=-1", {IN=>"a\n"}, {OUT=>''}], + ['elide-l2', "--lines=-1", {IN=>"a"}, {OUT=>''}], + ['elide-l3', "--lines=-1", {IN=>"a\nb"}, {OUT=>"a\n"}], + ['elide-l4', "--lines=-1", {IN=>"a\nb\n"}, {OUT=>"a\n"}], + ); + +if ($ENV{RUN_EXPENSIVE_TESTS}) + { + # Brute force: use all combinations of file sizes [0..20] and + # number of bytes to elide [0..20]. For better coverage, recompile + # head with -DHEAD_TAIL_PIPE_READ_BUFSIZE=4 and + # -DHEAD_TAIL_PIPE_BYTECOUNT_THRESHOLD=8 + my $s = "abcdefghijklmnopqrst"; + for my $file_size (0..20) + { + for my $n_elide (0..20) + { + my $input = substr $s, 0, $file_size; + my $out_len = $n_elide < $file_size ? $file_size - $n_elide : 0; + my $output = substr $input, 0, $out_len; + my $t = ["elideb$file_size-$n_elide", "--bytes=-$n_elide", + {IN=>$input}, {OUT=>$output}]; + push @Tests, $t; + my @u = @$t; + # Insert the ---presume-input-pipe option. + $u[0] .= 'p'; + $u[1] .= ' ---presume-input-pipe'; + push @Tests, \@u; + } + } + + $s =~ s/(.)/$1\n/g; + for my $file_size (0..20) + { + for my $n_elide (0..20) + { + my $input = substr $s, 0, 2 * $file_size; + my $out_len = $n_elide < $file_size ? $file_size - $n_elide : 0; + my $output = substr $input, 0, 2 * $out_len; + my $t = ["elidel$file_size-$n_elide", "--lines=-$n_elide", + {IN=>$input}, {OUT=>$output}]; + push @Tests, $t; + my @u = @$t; + # Insert the ---presume-input-pipe option. + $u[0] .= 'p'; + $u[1] .= ' ---presume-input-pipe'; + push @Tests, \@u; + } + } + } + +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; |