use strict;
use warnings FATAL => 'all';

use Test::More;
use t::common qw( new_dbm );

use_ok( 'DBM::Deep' );

my $salt = 38473827;

# Warning: This digest function is for testing ONLY.
# It is NOT intended for actual use. If you do so, I will laugh at you.
sub my_digest {
    my $key = shift;
    my $num = $salt;
    
    for (my $k=0; $k<length($key); $k++) {
        $num += ord( substr($key, $k, 1) );
    }
    
    return sprintf("%00000008d", $num);
}

my $dbm_factory = new_dbm( digest => \&my_digest, hash_size => 8 );
while ( my $dbm_maker = $dbm_factory->() ) {
    my $db = $dbm_maker->();

    ##
    # put/get key
    ##
    $db->{key1} = "value1";
    ok( $db->{key1} eq "value1" );

    $db->put("key2", "value2");
    ok( $db->get("key2") eq "value2" );

    ##
    # key exists
    ##
    ok( $db->exists("key1") );
    ok( exists $db->{key2} );

    ##
    # count keys
    ##
    ok( scalar keys %$db == 2 );

    ##
    # step through keys
    ##
    my $temphash = {};
    while ( my ($key, $value) = each %$db ) {
        $temphash->{$key} = $value;
    }

    ok( ($temphash->{key1} eq "value1") && ($temphash->{key2} eq "value2") );

    $temphash = {};
    my $key = $db->first_key();
    while ($key) {
        $temphash->{$key} = $db->get($key);
        $key = $db->next_key($key);
    }

    ok( ($temphash->{key1} eq "value1") && ($temphash->{key2} eq "value2") );

    ##
    # delete keys
    ##
    ok( delete $db->{key1} );
    ok( $db->delete("key2") );

    ok( scalar keys %$db == 0 );

    ##
    # delete all keys
    ##
    $db->put("another", "value");
    $db->clear();

    ok( scalar keys %$db == 0 );

    ##
    # replace key
    ##
    $db->put("key1", "value1");
    $db->put("key1", "value2");

    ok( $db->get("key1") eq "value2" );

    $db->put("key1", "value222222222222222222222222");

    ok( $db->get("key1") eq "value222222222222222222222222" );
}
done_testing;