Type::Tiny::Manual::UsingWithTestMore(3) User Contributed Perl Documentation
NAME
Type::Tiny::Manual::UsingWithTestMore - Type::Tiny for test suites
MANUAL
Test::TypeTiny
This is a module for testing that types you've defined accept and
reject the values you think they should.
should_pass($value, $type);
should_fail($othervalue, $type);
Easy. (But yeah, I always forget whether the type goes first or
second!)
There's also a function to test that subtype/supertype relationships
are working okay.
ok_subtype($type, @subtypes);
Of course you can just check a type like this:
ok( $type->check($value) );
But the advantage of "should_pass" is that if the "EXTENDED_TESTING"
environment variable is set to true, "should_pass" will also perform a
strict check on the value, which involves climbing up the type's
inheritance tree (its parent, its parent's parent, etc) to make sure
the value passes all their constraints.
If a normal check and strict check differ, this is usually a problem in
the inlining code somewhere.
See Test::TypeTiny for more information.
Type::Tiny as a Replacement for Test::Deep
Here's one of the examples from the Test::Deep documentation:
my $name_re = re('^(Mr|Mrs|Miss) \w+ \w+$');
cmp_deeply(
$person,
{
Name => $name_re,
Phone => re('^0d{6}$'),
ChildNames => array_each($name_re)
},
"person ok"
);
It's pretty easy to rewrite this to use Types::Standard:
my $name = StrMatch[ qr/^(Mr|Mrs|Miss) \w+ \w+$/ ];
should_pass(
$person,
Dict[
Name => $name,
Phone => StrMatch[ qr/^0d{6}$/ ],
ChildNames => ArrayRef[$name]
]
);
There's nothing especially wrong with Test::Deep, but if you're already
familiar with Type::Tiny's built-in types and you've maybe written your
own type libraries too, it will save you having to switch between using
two separate systems of checks.
NEXT STEPS
Here's your next step:
o Type::Tiny::Manual::Params(3)
Advanced information on Type::Params(3), and using Type::Tiny(3)
with other signature modules like Function::Parameters and Kavorka.
AUTHOR
Toby Inkster <tobyink@cpan.org>.
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.
DISCLAIMER OF WARRANTIES
THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
perl v5.34.3 2025-05-03
Type::Tiny::Manual::UsingWithTestMore(3)
type-tiny 2.8.2 - Generated Wed Aug 6 12:50:49 CDT 2025