Standardized test incantations

[dbsrgits/DBM-Deep.git] / t / 16_circular.t

##
# DBM::Deep Test
##
use strict;
use Test::More tests => 32;
use t::common qw( new_fh );

use_ok( 'DBM::Deep' );

my ($fh, $filename) = new_fh();
my $db = DBM::Deep->new( $filename );

##
# put/get simple keys
##
$db->{key1} = "value1";
$db->{key2} = "value2";

my @keys_1 = sort keys %$db;

$db->{key3} = $db->{key1};

my @keys_2 = sort keys %$db;
is( @keys_2 + 0, @keys_1 + 1, "Correct number of keys" );
is_deeply(
    [ @keys_1, 'key3' ],
    [ @keys_2 ],
    "Keys still match after circular reference is added",
);

$db->{key4} = { 'foo' => 'bar' };
$db->{key5} = $db->{key4};
$db->{key6} = $db->{key5};

my @keys_3 = sort keys %$db;

is( @keys_3 + 0, @keys_2 + 3, "Correct number of keys" );
is_deeply(
    [ @keys_2, 'key4', 'key5', 'key6', ],
    [ @keys_3 ],
    "Keys still match after circular reference is added (@keys_3)",
);

##
# Insert circular reference
##
$db->{circle} = $db;

my @keys_4 = sort keys %$db;

is( @keys_4 + 0, @keys_3 + 1, "Correct number of keys" );
is_deeply(
    [ 'circle', @keys_3 ],
    [ @keys_4 ],
    "Keys still match after circular reference is added",
);

##
# Make sure keys exist in both places
##
is( $db->{key1}, 'value1', "The value is there directly" );
is( $db->{circle}{key1}, 'value1', "The value is there in one loop of the circle" );
is( $db->{circle}{circle}{key1}, 'value1', "The value is there in two loops of the circle" );
is( $db->{circle}{circle}{circle}{key1}, 'value1', "The value is there in three loops of the circle" );

##
# Make sure changes are reflected in both places
##
$db->{key1} = "another value";

isnt( $db->{key3}, 'another value', "Simple scalars are copied by value" );

is( $db->{key1}, 'another value', "The value is there directly" );
is( $db->{circle}{key1}, 'another value', "The value is there in one loop of the circle" );
is( $db->{circle}{circle}{key1}, 'another value', "The value is there in two loops of the circle" );
is( $db->{circle}{circle}{circle}{key1}, 'another value', "The value is there in three loops of the circle" );

$db->{circle}{circle}{circle}{circle}{key1} = "circles";

is( $db->{key1}, 'circles', "The value is there directly" );
is( $db->{circle}{key1}, 'circles', "The value is there in one loop of the circle" );
is( $db->{circle}{circle}{key1}, 'circles', "The value is there in two loops of the circle" );
is( $db->{circle}{circle}{circle}{key1}, 'circles', "The value is there in three loops of the circle" );

is( $db->{key4}{foo}, 'bar' );
is( $db->{key5}{foo}, 'bar' );
is( $db->{key6}{foo}, 'bar' );

$db->{key4}{foo2} = 'bar2';
is( $db->{key4}{foo2}, 'bar2' );
is( $db->{key5}{foo2}, 'bar2' );
is( $db->{key6}{foo2}, 'bar2' );

$db->{key4}{foo3} = 'bar3';
is( $db->{key4}{foo3}, 'bar3' );
is( $db->{key5}{foo3}, 'bar3' );
is( $db->{key6}{foo3}, 'bar3' );

$db->{key4}{foo4} = 'bar4';
is( $db->{key4}{foo4}, 'bar4' );
is( $db->{key5}{foo4}, 'bar4' );
is( $db->{key6}{foo4}, 'bar4' );