# phpman > man > Test::Builder::Module(3pm)

## NAME
    [Test::Builder::Module](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3ABuilder%3A%3AModule/markdown) - Base class for test modules

## SYNOPSIS
      # Emulates [Test::Simple](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3ASimple/markdown)
      package [Your::Module](https://www.chedong.com/phpMan.php/perldoc/Your%3A%3AModule/markdown);

      my $CLASS = __PACKAGE__;

      use parent '[Test::Builder::Module](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3ABuilder%3A%3AModule/markdown)';
      @EXPORT = qw(ok);

      sub ok ($;$) {
          my $tb = $CLASS->builder;
          return $tb->ok(@_);
      }

      1;

## DESCRIPTION
    This is a superclass for [Test::Builder](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3ABuilder/markdown)-based modules. It provides a handful of common
    functionality and a method of getting at the underlying [Test::Builder](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3ABuilder/markdown) object.

### Importing
    [Test::Builder::Module](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3ABuilder%3A%3AModule/markdown) is a subclass of Exporter which means your module is also a subclass of
    Exporter. @EXPORT, @EXPORT_OK, etc... all act normally.

    A few methods are provided to do the "use [Your::Module](https://www.chedong.com/phpMan.php/perldoc/Your%3A%3AModule/markdown) tests => 23" part for you.

   import
    [Test::Builder::Module](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3ABuilder%3A%3AModule/markdown) provides an "import()" method which acts in the same basic way as
    [Test::More](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3AMore/markdown)'s, setting the plan and controlling exporting of functions and variables. This allows
    your module to set the plan independent of [Test::More](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3AMore/markdown).

    All arguments passed to "import()" are passed onto "[Your::Module](https://www.chedong.com/phpMan.php/perldoc/Your%3A%3AModule/markdown)->builder->plan()" with the
    exception of "import =>[qw(things to import)]".

        use [Your::Module](https://www.chedong.com/phpMan.php/perldoc/Your%3A%3AModule/markdown) import => [qw(this that)], tests => 23;

    says to import the functions "this()" and "that()" as well as set the plan to be 23 tests.

    "import()" also sets the "exported_to()" attribute of your builder to be the caller of the
    "import()" function.

    Additional behaviors can be added to your "import()" method by overriding "import_extra()".

   import_extra
        [Your::Module](https://www.chedong.com/phpMan.php/perldoc/Your%3A%3AModule/markdown)->import_extra(\@import_args);

    "import_extra()" is called by "import()". It provides an opportunity for you to add behaviors to
    your module based on its import list.

    Any extra arguments which shouldn't be passed on to "plan()" should be stripped off by this
    method.

    See [Test::More](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3AMore/markdown) for an example of its use.

    NOTE This mechanism is *VERY ALPHA AND LIKELY TO CHANGE* as it feels like a bit of an ugly hack
    in its current form.

### Builder
    [Test::Builder::Module](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3ABuilder%3A%3AModule/markdown) provides some methods of getting at the underlying [Test::Builder](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3ABuilder/markdown) object.

   builder
      my $builder = [Your::Class](https://www.chedong.com/phpMan.php/perldoc/Your%3A%3AClass/markdown)->builder;

    This method returns the [Test::Builder](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3ABuilder/markdown) object associated with [Your::Class](https://www.chedong.com/phpMan.php/perldoc/Your%3A%3AClass/markdown). It is not a
    constructor so you can call it as often as you like.

    This is the preferred way to get the [Test::Builder](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3ABuilder/markdown) object. You should *not* get it via
    "[Test::Builder](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3ABuilder/markdown)->new" as was previously recommended.

    The object returned by "builder()" may change at runtime so you should call "builder()" inside
    each function rather than store it in a global.

      sub ok {
          my $builder = [Your::Class](https://www.chedong.com/phpMan.php/perldoc/Your%3A%3AClass/markdown)->builder;

          return $builder->ok(@_);
      }

## SEE ALSO
    [Test2::Manual::Tooling::TestBuilder](https://www.chedong.com/phpMan.php/perldoc/Test2%3A%3AManual%3A%3ATooling%3A%3ATestBuilder/markdown) describes the improved options for writing testing modules
    provided by Test2.