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#!/usr/bin/perl
use strict;
use warnings;
#
# Unit tests of _upcopy function
#
# _upcopy($self, $source, $dest, $len)
#
# Take a block of data of leength $len at $source and copy it
# to $dest, which must be <= $source but which need not be <= $source - $len
# (That is, this will only copy a block to a position earlier in the file,
# but the source and destination regions may overlap.)
my $file = "tf29a-$$.txt";
print "1..55\n";
my $N = 1;
use Tie::File;
print "ok $N\n"; $N++;
$: = Tie::File::_default_recsep();
my @subtests = qw(x <x x> x><x <x> <x><x x><x> <x><x> <x><x><x> 0);
my $FLEN = 40970; # 2410 records of 17 chars each
# (2-7) Trivial non-moves at start of file
try(0, 0, 0);
try(0, 0, 10);
try(0, 0, 100);
try(0, 0, 1000);
try(0, 0, 10000);
try(0, 0, 20000);
# (8-13) Trivial non-moves in middle of file
try(100, 100, 0);
try(100, 100, 10);
try(100, 100, 100);
try(100, 100, 1000);
try(100, 100, 10000);
try(100, 100, 20000);
# (14) Trivial non-move at end of file
try($FLEN, $FLEN, 0);
# (15-17) Trivial non-move of tail of file
try(0, 0, undef);
try(100, 100, undef);
try($FLEN, $FLEN, undef);
# (18-24) Moves to start of file
try(100, 0, 0);
try(100, 0, 10);
try(100, 0, 100);
try(100, 0, 1000);
try(100, 0, 10000);
try(100, 0, 20000);
try(100, 0, undef);
# (25-31) Moves in middle of file
try(200, 100, 0);
try(200, 100, 10);
try(200, 100, 100);
try(200, 100, 1000);
try(200, 100, 10000);
try(200, 100, 20000);
try(200, 100, undef);
# (32-43) Moves from end of file
try($FLEN, 10000, 0);
try($FLEN-10, 10000, 10);
try($FLEN-100, 10000, 100);
try($FLEN-1000, 200, 1000);
try($FLEN-10000, 200, 10000);
try($FLEN-20000, 200, 20000);
try($FLEN, 10000, undef);
try($FLEN-10, 10000, undef);
try($FLEN-100, 10000, undef);
try($FLEN-1000, 200, undef);
try($FLEN-10000, 200, undef);
try($FLEN-20000, 200, undef);
$FLEN = 40960;
# (44-55) Moves from end of file when file ends on a block boundary
try($FLEN, 10000, 0);
try($FLEN-10, 10000, 10);
try($FLEN-100, 10000, 100);
try($FLEN-1000, 200, 1000);
try($FLEN-10000, 200, 10000);
try($FLEN-20000, 200, 20000);
try($FLEN, 10000, undef);
try($FLEN-10, 10000, undef);
try($FLEN-100, 10000, undef);
try($FLEN-1000, 200, undef);
try($FLEN-10000, 200, undef);
try($FLEN-20000, 200, undef);
sub try {
my ($src, $dst, $len) = @_;
open F, '>', $file or die "Couldn't open file $file: $!";
binmode F;
# The record has exactly 17 characters. This will help ensure that
# even if _upcopy screws up, the data doesn't coincidentally
# look good because the remainder accidentally lines up.
my $d = substr("0123456789abcdef$:", -17);
my $recs = defined($FLEN) ?
int($FLEN/length($d))+1 : # enough to make up at least $FLEN
int(8192*5/length($d))+1; # at least 5 blocks' worth
my $oldfile = $d x $recs;
my $flen = defined($FLEN) ? $FLEN : $recs * 17;
substr($oldfile, $FLEN) = "" if defined $FLEN; # truncate
print F $oldfile;
close F;
die "wrong length!" unless -s $file == $flen;
# If len is specified, use that. If it's undef,
# then behave *as if* we had specified the whole rest of the file
my $expected = $oldfile;
if (defined $len) {
substr($expected, $dst, $len) = substr($expected, $src, $len);
} else {
substr($expected, $dst) = substr($expected, $src);
}
my $o = tie my @lines, 'Tie::File', $file or die $!;
local $SIG{ALRM} = sub { die "Alarm clock" };
my $a_retval = eval { alarm(5) unless $^P; $o->_upcopy($src, $dst, $len) };
my $err = $@;
undef $o; untie @lines; alarm(0);
if ($err) {
if ($err =~ /^Alarm clock/) {
print "# Timeout\n";
print "not ok $N\n"; $N++;
return;
} else {
$@ = $err;
die;
}
}
open F, '<', $file or die "Couldn't open file $file: $!";
binmode F;
my $actual;
{ local $/;
$actual = <F>;
}
close F;
my ($alen, $xlen) = (length $actual, length $expected);
unless ($alen == $xlen) {
print "# try(@_) expected file length $xlen, actual $alen!\n";
}
print $actual eq $expected ? "ok $N\n" : "not ok $N\n";
$N++;
}
sub ctrlfix {
for (@_) {
s/\n/\\n/g;
s/\r/\\r/g;
}
}
END {
1 while unlink $file;
}
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