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TOBYINK / Type-Tiny-2.007_009 / t / 20-modules / Type-Tiny-Union / basic.t 

            

              
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=pod
=encoding utf-8
=head1 PURPOSE
Checks union type constraints work.
=head1 DEPENDENCIES
Uses the bundled BiggerLib.pm type library.
=head1 AUTHOR
Toby Inkster E<lt>tobyink@cpan.orgE<gt>.
=head1 COPYRIGHT AND LICENCE
This software is copyright (c) 2013-2014, 2017-2025 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 strict;
use warnings;
use lib qw( ./lib ./t/lib ../inc ./inc );
use Test::More;
use Test::Fatal;
use Test::TypeTiny;
use BiggerLib qw( :types );
use Type::Utils qw( union class_type );
{ my $x; sub FooBarOrDoesQuux () { $x ||= union(FooBarOrDoesQuux => [FooBar, DoesQuux]) } }
isa_ok(
        FooBarOrDoesQuux,
        'Type::Tiny::Union',
        'FooBarOrDoesQuux',
);
isa_ok(
        FooBarOrDoesQuux->[0],
        'Type::Tiny::Class',
        'FooBarOrDoesQuux->[0]',
);
isa_ok(
        FooBarOrDoesQuux->[1],
        'Type::Tiny::Role',
        'FooBarOrDoesQuux->[1]',
);
is(
        FooBarOrDoesQuux."",
        'FooBar|DoesQuux',
        'stringification good',
);
my $something = bless [] => do {
        package Something;
        sub DOES {
                return 1 if $_[1] eq 'Quux';
                $_[0]->isa($_[0]);
        }
        __PACKAGE__;
};
should_pass("Foo::Bar"->new, FooBarOrDoesQuux);
should_pass("Foo::Baz"->new, FooBarOrDoesQuux);
should_pass($something, FooBarOrDoesQuux);
my $something_else = bless [] => do {
        package Something::Else;
        sub DOES {
                return 1 if $_[1] eq 'Else';
                $_[0]->isa($_[0]);
        }
        __PACKAGE__;
};
should_fail($something_else, FooBarOrDoesQuux);
should_fail("Foo::Bar", FooBarOrDoesQuux);
should_fail("Foo::Baz", FooBarOrDoesQuux);
{ my $x; sub NotherUnion () { $x ||= union(NotherUnion => [BigInteger, FooBarOrDoesQuux, SmallInteger]) } }
is(
        scalar @{+NotherUnion},
        4,
        "unions don't get unnecessarily deep",
);
{ package Local::A }
{ package Local::B }
{ package Local::C }
{ package Local::A::A; our @ISA = qw(Local::A) }
{ package Local::A::B; our @ISA = qw(Local::A) }
{ package Local::A::AB; our @ISA = qw(Local::A::A Local::A::B) }
{ package Local::A::X; our @ISA = qw(Local::A)  }
my $c1 = union [
        class_type({ class => "Local::A::AB" }),
        class_type({ class => "Local::A::X" }),
];
ok(
        $c1->parent == class_type({ class => "Local::A" }),
        "can climb up parents of union type constraints to find best common ancestor",
);
my $c2 = union [
        class_type({ class => "Local::A" }),
        class_type({ class => "Local::B" }),
        class_type({ class => "Local::C" }),
];
isnt(
        exception { push @{ $c2 }, 'quux' },
        undef,
        'cannot push to overloaded arrayref'
);
ok(
        $c2->parent == Types::Standard::Object(),
        "can climb up parents of union type constraints to find best common ancestor (again)",
);
is(
        $c2->find_type_for( bless({}, 'Local::B') )->class,
        'Local::B',
        'Union find_type_for',
);
is(
        $c2->find_type_for( bless({}, 'Local::A::A') )->class,
        'Local::A',
        'Union find_type_for (less obvious)',
);
is(
        $c2->find_type_for( bless({}, 'Local::A::AB') )->class,
        'Local::A',
        'Union find_type_for (ambiguous)',
);
is(
        $c2->find_type_for( bless({}, 'Local::D') ),
        undef,
        'Union find_type_for (none)',
);
ok(
        (FooBar|DoesQuux)==(DoesQuux|FooBar),
        'Union equals',
);
ok(
        (FooBar|DoesQuux)!=(DoesQuux|SmallInteger),
        'Union not equals',
);
done_testing;