diff options
author | Jim Meyering <jim@meyering.net> | 2003-05-04 13:46:52 +0000 |
---|---|---|
committer | Jim Meyering <jim@meyering.net> | 2003-05-04 13:46:52 +0000 |
commit | beaff195edf6db7a777f9bdcfe6b834b9fa61687 (patch) | |
tree | 09d73b84dc2a3cc1aa1ac67631a021df9fc71623 | |
parent | f1ce5dbf0e453e753a1a42fdc28cbdc0d8d637a7 (diff) | |
download | coreutils-beaff195edf6db7a777f9bdcfe6b834b9fa61687.tar.xz |
Exercise head's --bytes=-N option.
-rwxr-xr-x | tests/misc/head-elide-tail | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/tests/misc/head-elide-tail b/tests/misc/head-elide-tail new file mode 100755 index 000000000..43d39b2b1 --- /dev/null +++ b/tests/misc/head-elide-tail @@ -0,0 +1,76 @@ +#!/bin/sh +# -*- perl -*- +# Exercise head's --bytes=-N option. + +: ${PERL=perl} +: ${srcdir=.} + +$PERL -e 1 > /dev/null 2>&1 || { + echo 1>&2 "$0: configure didn't find a usable version of Perl," \ + "so can't run this test" + exit 77 +} + +exec $PERL -w -I$srcdir/.. -MFetish -- - <<\EOF +#/ +require 5.003; +use strict; + +(my $program_name = $0) =~ s|.*/||; + +$ENV{PROG} = 'head'; + +# Turn off localization of executable's ouput. +@ENV{qw(LANGUAGE LANG LC_ALL)} = ('C') x 3; + +# This should match the definition in head.c. +my $READ_BUFSIZE = 4096; + +my @Tests = + ( + # Elide the exact size of the file. + ['elide-1', "--bytes=-2", {IN=>"a\n"}, {OUT=>''}], + # Elide more than the size of the file. + ['elide-2', "--bytes=-2", {IN=>"a"}, {OUT=>''}], + # Leave just one byte. + ['elide-3', "--bytes=-2", {IN=>"abc"}, {OUT=>'a'}], + # Make it so the elided bytes straddle the end of the first + # $READ_BUFSIZE block. + ['elide-4', "--bytes=-2", + {IN=> 'a' x ($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-5', "--bytes=-2", + {IN=> 'a' x (2 * $READ_BUFSIZE - 2) . 'bcd'}, + {OUT=>'a' x (2 * $READ_BUFSIZE - 2) . 'b'}], + ); + +# Brute force: use all combinations of file sizes [0..20] and +# number of bytes to elide [0..20]. +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 $t = ["elide-$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; + } + } + +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 |