use Test::More 0.95;
use strict;
use warnings;
my $class = 'Business::ISBN';
my @methods = qw( increment decrement _step_article_code );
my $isbn_string = '978-1-4493-9311-3'; # Mastering Perl
my $isbn;
subtest setup => sub {
use_ok( $class );
can_ok( $class, @methods );
};
subtest make_isbn => sub {
$isbn = $class->new( $isbn_string );
isa_ok( $isbn, $class );
can_ok( $class, @methods );
};
subtest one_more => sub {
my $isbn = $class->new( '978-1-4493-9311-3' );
isa_ok( $isbn, $class );
my $one_more = $class->new( '978-1-4493-9312-3' );
$one_more->fix_checksum;
isa_ok( $one_more, $class );
my $isbn_one_more = $isbn->increment;
isa_ok( $isbn_one_more, $class );
is( $one_more->as_string, $isbn_one_more->as_string, 'One more matches' );
};
subtest one_less => sub {
my $isbn = $class->new( '978-1-4493-9311-3' );
isa_ok( $isbn, $class );
my $one_less = $class->new( '978-1-4493-9310-3' );
$one_less->fix_checksum;
isa_ok( $one_less, $class );
my $isbn_one_less = $isbn->decrement;
isa_ok( $isbn_one_less, $class );
is( $one_less->as_string, $isbn_one_less->as_string, 'One less matches' );
};
subtest too_little => sub {
my $isbn = $class->new( '978-1-4493-0000-3' );
$isbn->fix_checksum;
isa_ok( $isbn, $class );
my $isbn_one_less = $isbn->decrement;
is( $isbn_one_less, Business::ISBN::ARTICLE_CODE_OUT_OF_RANGE(),
'Incrementing below 0 would be out of range' );
};
subtest too_much => sub {
my $isbn = $class->new( '978-1-4493-9999-3' );
$isbn->fix_checksum;
isa_ok( $isbn, $class );
my $isbn_one_more = $isbn->increment;
is( $isbn_one_more, Business::ISBN::ARTICLE_CODE_OUT_OF_RANGE(),
'Incrementing past 9999 would be out of range' );
};
done_testing();