NAME

Test::Stub::Generator - be able to generate stub (submodule and method) having check argument and control return value.

SYNOPSIS

use strict;
use warnings;

use Test::More;
use Test::Deep;
use Test::Deep::Matcher;
use Test::Stub::Generator qw(make_method_utils);

###
# sample package
###
package Some::Class;
sub new { bless {}, shift };
sub method;

###
# test code
###
package main;

my $MEANINGLESS = -1;

my ($stub_method, $util) = make_method_utils(
#my $method = make_method(
    [
        # checking argument
        { expects => [ 0, 1 ], return => $MEANINGLESS },
        # control return_values
        { expects => [$MEANINGLESS], return => [ 0, 1 ] },

        # expects supported ignore(Test::Deep) and type(Test::Deep::Matcher)
        { expects => [ignore, 1],  return => $MEANINGLESS },
        { expects => [is_integer], return => $MEANINGLESS },
    ],
    { message => 'method arguments are ok' }
);

my $obj = Some::Class->new;
*Some::Class::method = $stub_method;
# ( or use Test::Mock::Guard )
# my $mock_guard = mock_guard( $obj => +{ method => $stub_method } );

# { expects => [ 0, 1 ], return => xxxx }
$obj->method( 0, 1 );
# ok xxxx- method arguments are ok

is_deeply( $obj->method($MEANINGLESS), [ 0, 1 ], 'return values are as You expected' );
# { expects => xxxx, return => [ 0, 1 ] }
# ok xxxx- return values are as You expected

$obj->method( sub{}, 1 );
# { expects => [ignore, 1], return => xxxx }
# ok xxxx- method arguments are ok

$obj->method(1);
# { expects => [is_integer], return => xxxx }
# ok xxxx- method arguments are ok

ok( !$util->has_next, 'empty' );
is( $util->called_count, 4, 'called_count is 4' );

done_testing;

DESCRIPTION

Test::Stub::Generator is library for supports the programmer in wriring test code.

Functions

make_subroutine($expects_and_return, $opts)

simulate subroutine (do not receive $self)

make_method($expects_and_return, $opts)

simulate object method (receive $self)

Parameters

$expects_and_return(first arguments)

$expects_and_return required the hash_ref (single or array_ref)

my $method = make_method(
    { expects => [1], return => 2 }
);
my $method = make_method(
  [
    { expects => [1], return => 2 }
    { expects => [2], return => 3 }
  ]
);

expects

automaic checking $method_argument

$method->(1); # ok xxxx- [stub] arguments are as You expected

return

control return_value

my $return = $method->(1); # $return = 2;

$opts(second arguments)

my $method = make_method(
  { expects => [1], return => 2 },
  { message => "arguments are ok", is_repeat => 1 }
);

message

change message

is_repeat

repeat mode ( repeating $expects_and_return->{0] ) ( can use make_repeat_method / make_repeat_subroutine )

Utility Method (second return_value method)

my ($method, $util) = make_subroutine_utils($expects_and_return, $opts)
my ($method, $util) = make_method_utils($expects_and_return, $opts)

$util->called_count

return a number of times that was method called

$util->has_next

return a boolean. if there are still more $expects_and_return_list, then true(1). if there are not, then false(0).

$util->is_repeat

return a value $opt->{is_repeat}

Setting Sheat

single value

# { expects => [ 1 ], return => xxxx }
$obj->method(1);

# { expects => xxxx, return => 1 }
is_deeply( $obj->method($MEANINGLESS), 1, 'single' );

array value

# { expects => [ ( 0, 1 ) ], return => xxxx }
$obj->method( 0, 1 );

# { expects => xxxx, return => sub{ ( 0, 1 ) } }
is_deeply( [$obj->method($MEANINGLESS)], [ ( 0, 1 ) ], 'array' );

hash value

# { expects => [ a => 1 ], return => xxxx }
$obj->method(a => 1);

# { expects => xxxx, return => sub{ a => 1 } }
is_deeply( [$obj->method($MEANINGLESS)], [ a => 1 ], 'hash' );

array ref

# { expects => [ [ 0, 1 ] ], return => xxxx }
$obj->method( [ 0, 1 ] );

# { expects => xxxx, return => [ 0, 1 ] }
is_deeply( $obj->method($MEANINGLESS), [ 0, 1 ], 'array_ref' );

hash ref

# { expects => [ { a => 1 } ], return => xxxx }
$obj->method( { a => 1 } );

# { expects => xxxx, return => { a => 1 } }
is_deeply( $obj->method($MEANINGLESS), { a => 1 }, 'hash_ref' );

complex values

# { expects => [ 0, [ 0, 1 ], { a => 1 } ], return => xxxx }
$obj->method( 0, [ 0, 1 ], { a => 1 } );

# { expects => xxxx, return => [ 0, [ 0, 1 ], { a => 1 } ] }
is_deeply( $obj->method($MEANINGLESS), [ 0, [ 0, 1 ], { a => 1 } ], 'complex' );

dont check arguments (Test::Deep)

# { expects => [ignore, 1], return => xxxx }
$obj->method(sub{},1);

check argument using type (Test::Deep::Matcher)

# { expects => [is_integer], return => xxxx }
$obj->method(1);

# { expects => [is_string],  return => xxxx }
$obj->method("AAAA");

LICENSE

Copyright (C) Hiroyoshi Houchi.

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

AUTHOR

Hiroyoshi Houchi <hixi@cpan.org>

cpanm Test::Stub::Generator

perl -MCPAN -e shell
install Test::Stub::Generator