NAME

Test::Double - Perl extension for Test Double.

SYNOPSIS

package Foo;
sub new { bless {}, shift }
sub bar { 'bar' }

# in your tests
use Test::More;
use Test::Double;

my $foo = Foo->new;
is $foo->bar, 'bar', 'bar() returns "bar"';

# stub out
stub($foo)->bar('BAR');
is $foo->bar, 'BAR', 'stubbed bar() returns "BAR"';

# mock out
mock($foo)->expects('bar')->at_most(2)->returns('BAR');
is $foo->bar, 'BAR', 'mocked bar() returns "BAR"';

my $result = Test::Double->verify_result;
ok $result->{bar}->{at_most};

Test::Double->verify;
Test::Double->reset;

done_testing;

DESCRIPTION

Test::Double is a Perl extension for Test Double.

METHODS

stub($object)

Returns stub object. This object accepts any methods for stubbing using AUTOLOAD mechanism.

stub($object)->some_method($expected_value);
# after, $object->some_method() returns $expected_value

See http://xunitpatterns.com/Test%20Stub.html

mock($object)

Returns mock object. This object can be defined expectation by calling expects() method.

mock($object)->expects('some_method');
# after, $object->some_method() returns $expected_value

See Test::Double::Mock

verify

Verify how many times method calling, and method calling with what args.

verify_result

Returns verified result.

my $result = Test::Double->verify_result;
$result->{some_method}->{at_least};
# result->{what method}->{what expectation}

reset

Reset mocking objects.

AUTHOR

NAKAGAWA Masaki <masaki@cpan.org>

LICENSE

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

SEE ALSO

http://xunitpatterns.com/Test%20Double.html

Test::Stub, Class::Monadic