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This is what the side_effect() functionality does... allows you to do stuff (eg: modify an object) when there's no need for a return. Here's an example:

use warnings; use strict; package Thing; { sub new { return bless {}, shift; } sub modify { my ($self) = @_; $self->{modified} = 'modified by original sub'; } } package main; use Data::Dumper; use Mock::Sub; use Test::More; my $m = Mock::Sub->new; my $thing = Thing->new; my $modify_sub = $m->mock('Thing::modify'); $modify_sub->side_effect( sub { my $obj = shift; $obj->{modified} = 'modified by mocked sub'; } ); print "before mocked sub called...\n\n"; print Dumper $thing; $thing->modify; print "\n\nafter mocked sub called...\n\n"; print Dumper $thing; print "\n\n"; is defined $thing->{modified}, 1, "obj was modified ok"; like $thing->{modified}, qr/mocked sub/, "obj was changed by mock"; is $modify_sub->called, 1, "mocked sub called ok"; done_testing();

Output:

before mocked sub called... $VAR1 = bless( {}, 'Thing' ); after mocked sub called... $VAR1 = bless( { 'modified' => 'modified by mocked sub' }, 'Thing' ); ok 1 - obj was modified ok ok 2 - obj was changed by mock ok 3 - mocked sub called ok 1..3

So, there's no return anymore. The side_effect() code reference will get all parameters passed in as they were sent in to the real sub call (in this case, $self, as it's the only param on the method call. We then have the side effect add a new hash key to itself and assign it a value. After side effect is complete, the main object is updated just like the original function would have done, without having to call the real function.


In reply to Re^2: Testing Wrapped LDAP Classes by stevieb
in thread Testing Wrapped LDAP Classes by yulivee07

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