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TOBYINK / Type-Tiny-2.007_008 / t / 20-modules / Type-Coercion-Union / basic.t 

            

              
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=pod
=encoding utf-8
=head1 PURPOSE
Checks Type::Coercion::Union works.
=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 Types::Standard -types;
use Type::Utils;
my $RoundedInteger = declare RoundedInteger => as Int;
$RoundedInteger->coercion->add_type_coercions(Num, 'int($_)')->freeze;
should_pass("4", $RoundedInteger);
should_fail("1.1", $RoundedInteger);
should_fail("xyz", $RoundedInteger);
my $String3 = declare String3 => as StrMatch[qr/^.{3}$/];
$String3->coercion->add_type_coercions(Str, 'substr("$_   ", 0, 3)')->freeze;
should_pass("xyz", $String3);
should_fail("x", $String3);
should_fail("wxyz", $String3);
my $Union1 = union Union1 => [$RoundedInteger, $String3];
should_pass("3.4", $Union1);
should_pass("30", $Union1);
should_fail("3.12", $Union1);
should_fail("wxyz", $Union1);
is(
        $RoundedInteger->coerce("3.4"),
        "3",
        "RoundedInteger coerces from Num",
);
is(
        $RoundedInteger->coerce("xyz"),
        "xyz",
        "RoundedInteger does not coerce from Str",
);
is(
        $String3->coerce("30"),
        "30 ",
        "String3 coerces from Str",
);
my $arr = [];
is(
        $String3->coerce($arr),
        $arr,
        "String3 does not coerce from ArrayRef",
);
ok(
        $Union1->has_coercion,
        "unions automatically have a coercion if their child constraints do",
);
note $Union1->coercion->inline_coercion('$X');
ok(
        union([Str, ArrayRef]),
        "unions do not automatically have a coercion if their child constraints do not",
);
is(
        $Union1->coerce("4"),
        "4",
        "Union1 does not need to coerce an Int",
);
is(
        $Union1->coerce("xyz"),
        "xyz",
        "Union1 does not need to coerce a String3",
);
is(
        $Union1->coerce("3.1"),
        "3.1",
        "Union1 does not need to coerce a String3, even if it looks like a Num",
);
is(
        $Union1->coerce("abcde"),
        "abc",
        "Union1 coerces Str -> String3",
);
is(
        $Union1->coerce("3.123"),
        "3",
        "given the choice of two valid coercions, Union1 prefers RoundedInteger because it occurs sooner",
);
is(
        $Union1->coerce($arr),
        $arr,
        "Union1 cannot coerce an arrayref",
);
like(
        exception { $Union1->coercion->add_type_coercions(ArrayRef, q[ scalar(@$_) ]) },
        qr/^Adding coercions to Type::Coercion::Union not currently supported/,
        "Cannot add to Type::Tiny::Union's coercion",
);
done_testing;