Object::Deadly - An object that dies whenever examined

NAME

Object::Deadly - An object that dies whenever examined

SYNOPSIS

  use Object::Deadly;
  use Test::Exception 'lives_ok';
  
  # Test that a few functions inspect their parameters safely
  lives_ok { some_function( Object::Deadly->new ) } 'some_function';
  lives_ok { Dumper( Object::Deadly->new ) } 'Data::Dumper';

DESCRIPTION

This object is meant to be used in testing. All possible overloading and method calls die. You can pass this object into methods which are not supposed to accidentally trigger any potentially overloading.

This problem arose when testing the Data::Dump::Streamer manpage and the Carp manpage. The former was triggering overloaded object methods instead of just dumping their data. the Data::Dump::Streamer manpage is now safe for overloaded objects but it wouldn't have been unless it hadn't have been tested with a deadly, overloaded object.

DEALING WITH DEATH

TODO

METHODS

Object::Deadly->new()
Object::Deadly->new( MESSAGE )
The class method Object::Deadly->new returns an Object::Deadly object. Dies with a stack trace and a message when evaluated in any context. The default message contains a stack trace from where the object is created.

Object::Deadly->new_with( REFERENCE )
The class method Object::Deadly->new_with returns an Object::Deadly object. Dies with a stack trace and a message when evaluated in any context. The default message contains a stack trace from where the object is created.

Object::Deadly->kill_function( FUNCTION NAME )
Object::Deadly->kill_function( FUNCTION NAME, DEATH CODE REF )
The class method kill_function accepts a function name like isa, can, or similar and creates a function in the Object::Deadly::_unsafe class of the same name.

An optional second argument is a code reference to die with. This defaults to Object::Deadly->can( '_death' ).

Object::Deadly->kill_UNIVERSAL
This class method kills all currently known UNIVERSAL functions so they can't be called on a Object::Deadly object. This includes a list of methods known to the author and then an inspection of UNIVERSAL::.

Object::Deadly->get_death
Returns the function Object::Deadly::_death.

PRIVATE FUNCTIONS

The following functions are all private and not meant for public consumption.

_death( $obj )
This function temporarilly reblesses the object into Object::Deadly::_safe, extracts the message from inside of it, and confess's with it.

AUTHOR

Joshua ben Jore, <jjore at cpan.org>

BUGS

Please report any bugs or feature requests to bug-object-deadly at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

  perldoc Object::Deadly

You can also look for information at:

ACKNOWLEDGEMENTS

Yves Orton and Yitzchak Scott-Thoennes.

COPYRIGHT & LICENSE

Copyright 2006 Joshua ben Jore, all rights reserved.

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

 Object::Deadly - An object that dies whenever examined