use strict;
use warnings FATAL => 'all';
use Test::More;
use Test::Exception;
use t::common qw( new_fh );
use_ok( 'DBM::Deep' );
{
my ($fh, $filename) = new_fh();
my $db = DBM::Deep->new({
file => $filename,
autoflush => 1,
});
$db->{foo} = '1234';
$db->{foo} = '2345';
my $size = -s $filename;
$db->{foo} = '3456';
cmp_ok( $size, '==', -s $filename, "A second overwrite doesn't change size" );
$size = -s $filename;
delete $db->{foo};
cmp_ok( $size, '==', -s $filename, "Deleted space isn't released" );
$db->{bar} = '2345';
cmp_ok( $size, '==', -s $filename, "Added a new key after a delete reuses space" );
$db->{baz} = {};
$size = -s $filename;
delete $db->{baz};
$db->{baz} = {};
cmp_ok( $size, '==', -s $filename, "delete and rewrite reuses space" );
$db->{baz} = {};
$size = -s $filename;
$db->{baz} = {};
cmp_ok( $size, '==', -s $filename, "delete and rewrite reuses space" );
my $x = { foo => 'bar' };
$db->{floober} = $x;
delete $db->{floober};
ok( !exists $x->{foo}, "Deleting floober makes \$x empty (exists)" );
is( $x->{foo}, undef, "Deleting floober makes \$x empty (read)" );
is( delete $x->{foo}, undef, "Deleting floober makes \$x empty (delete)" );
eval { $x->{foo} = 'bar'; };
like( $@, qr/Cannot write to a deleted spot in DBM::Deep/, "Exception thrown when writing" );
cmp_ok( scalar( keys %$x ), '==', 0, "Keys returns nothing after deletion" );
}
{
my ($fh, $filename) = new_fh();
my $db = DBM::Deep->new({
file => $filename,
autoflush => 1,
});
$db->{ $_ } = undef for 1 .. 4;
delete $db->{ $_ } for 1 .. 4;
cmp_ok( keys %{ $db }, '==', 0, "We added and removed 4 keys" );
# So far, we've written 4 keys. Let's write 13 more keys. This should -not-
# trigger a reindex. This requires knowing how much space is taken. Good thing
# we wrote this dreck ...
my $size = -s $filename;
my $data_sector_size = $db->_engine->data_sector_size;
my $expected = $size + 9 * ( 2 * $data_sector_size );
$db->{ $_ } = undef for 5 .. 17;
cmp_ok( $expected, '==', -s $filename, "No reindexing after deletion" );
}
done_testing;