NAME

Test::Without::Module - Test fallback behaviour in absence of modules

SYNOPSIS

  use Test::Without::Module qw( My::Module );

  # Now, loading of My::Module fails :
  eval { require My::Module; };
  warn $@ if $@;

  # Now it works again
  eval q{ no Test::Without::Module qw( My::Module ) };
  eval { require My::Module; };
  print "Found My::Module" unless $@;

DESCRIPTION

This module allows you to deliberately hide modules from a program even though they are installed. This is mostly useful for testing modules that have a fallback when a certain dependency module is not installed.

EXPORT

None. All magic is done via use Test::Without::Module LIST and no Test::Without::Module LIST.

Test::Without::Module::get_forbidden_list

This function returns a reference to a copy of the current hash of forbidden modules or an empty hash if none are currently forbidden. This is convenient if you are testing and/or debugging this module.

ONE LINER

A neat trick for using this module from the command line was mentioned to me by NUFFIN:

  perl -MTest::Without::Module=Some::Module -w -Iblib/lib t/SomeModule.t

That way, you can easily see how your module or test file behaves when a certain module is unavailable.

BUGS

There is no lexicalic scoping

CREDITS

Much improvement must be thanked to Aristotle from PerlMonks, he pointed me to a much less convoluted way to fake a module at http://www.perlmonks.org/index.pl?node=192635.

I also discussed with him an even more elegant way of overriding CORE::GLOBAL::require, but the parsing of the overridden subroutine didn't work out the way I wanted it - CORE::require didn't recognize barewords as such anymore.

NUFFIN and Jerrad Pierce pointed out the convenient use from the command line to interactively watch the behaviour of the test suite and module in absence of a module.

AUTHOR

LICENSE

This module is released under the same terms as Perl itself.