=head1 PURPOSE

Run the test case from the SYNOPSIS of L<Tie::Hash::MultiValueOrdered>.

=head1 AUTHOR

Toby Inkster E<lt>tobyink@cpan.orgE<gt>.

=head1 COPYRIGHT AND LICENCE

This software is copyright (c) 2012-2013 by Toby Inkster.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=cut

use Test::More;
use Tie::Hash::MultiValueOrdered;

my $tied = tie my %hash, "Tie::Hash::MultiValueOrdered";

$hash{a} = 1;
$hash{b} = 2;
$hash{a} = 3;
$hash{b} = 4;

# Order of keys is predictable
is_deeply(
	[ keys %hash ],
	[ qw( a b ) ],
);

# Order of values is predictable
# Note that the last values of 'a' and 'b' are returned.
is_deeply(
	[ values %hash ],
	[ qw( 3 4 ) ],
);

# Can retrieve list of all key-value pairs
is_deeply(
	[ $tied->pairs ],
	[ qw( a 1 b 2 a 3 b 4 ) ],
);

# Switch the retrieval mode for the hash.
$tied->fetch_first;

# Now the first values of 'a' and 'b' are returned.
is_deeply(
	[ values %hash ],
	[ qw( 1 2 ) ],
);

# Switch the retrieval mode for the hash.
$tied->fetch_list;

# Now arrayrefs are returned.
is_deeply(
	[ values %hash ],
	[ [1,3], [2,4] ],
);

# Restore the default retrieval mode for the hash.
$tied->fetch_last;

done_testing;