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#!perl

use strict;
use warnings;

use lib 't/lib';
use DBDOracleTestLib qw/ oracle_test_dsn db_handle /;

use DBI;
use Test::More;

my $testcount = 9;

$| = 1;

my $dbh = db_handle( { PrintError => 0 } );
if ($dbh) {
    plan tests => $testcount;
}
else {
    plan skip_all => 'Unable to connect to Oracle';
}

my ( $nls_parameters_before, $nls_parameters_after );
my $old_date_format = 'HH24:MI:SS DD/MM/YYYY';
my $new_date_format = 'YYYYMMDDHH24MISS';

ok( $dbh->do("alter session set nls_date_format='$old_date_format'"),
    'set date format' );

like( $dbh->ora_can_unicode, qr/^[0123]/, 'ora_can_unicode' );

ok( $nls_parameters_before = $dbh->ora_nls_parameters,
    'fetch ora_nls_parameters' );
is( ref($nls_parameters_before),
    'HASH', 'check ora_nls_parameters returned hashref' );
is( $nls_parameters_before->{'NLS_DATE_FORMAT'},
    $old_date_format, 'check returned nls_date_format' );

ok( $dbh->do("alter session set nls_date_format='$new_date_format'"),
    'alter date format' );
ok( eq_hash( $nls_parameters_before, $dbh->ora_nls_parameters ),
    'check ora_nls_parameters caches old values' );

$nls_parameters_before->{NLS_DATE_FORMAT} = 'foo';
isnt(
    $nls_parameters_before->{NLS_DATE_FORMAT},
    $dbh->ora_nls_parameters->{NLS_DATE_FORMAT},
    'check ora_nls_parameters returns a copy'
);

is( $dbh->ora_nls_parameters(1)->{'NLS_DATE_FORMAT'},
    $new_date_format, 'refetch and check new nls_date_format value' );

__END__