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Test::Synopsis - Test your SYNOPSIS code


  # xt/synopsis.t (with Module::Install::AuthorTests)
  use Test::Synopsis;

  # Or, run safe without Test::Synopsis
  use Test::More;
  eval "use Test::Synopsis";
  plan skip_all => "Test::Synopsis required for testing" if $@;


Test::Synopsis is an (author) test module to find .pm or .pod files under your lib directory and then make sure the example snippet code in your SYNOPSIS section passes the perl compile check.

Note that this module only checks the perl syntax (by wrapping the code with sub) and doesn't actually run the code.

Suppose you have the following POD in your module.

  =head1 NAME
  Awesome::Template - My awesome template
  =head1 SYNOPSIS
    use Awesome::Template;
    my $template = Awesome::Template->new;

An user of your module would try copy-paste this synopsis code and find that this code doesn't compile because there's a typo in your variable name $tempalte. Test::Synopsis will catch that error before you ship it.


Sometimes you might want to put some undeclared variables in your synopsis, like:

  =head1 SYNOPSIS
    use Data::Dumper::Names;
    print Dumper($scalar, \@array, \%hash);

This assumes these variables like $scalar are defined elsewhere in module user's code, but Test::Synopsis, by default, will complain that these variables are not declared:

    Global symbol "$scalar" requires explicit package name at ...

In this case, you can add the following POD sequence elsewhere in your POD:

  =for test_synopsis
  no strict 'vars'

Or more explicitly,

  =for test_synopsis
  my($scalar, @array, %hash);

Test::Synopsis will find these =for blocks and these statements are prepended before your SYNOPSIS code when being evaluated, so those variable name errors will go away, without adding unnecessary bits in SYNOPSIS which might confuse users.


Tatsuhiko Miyagawa <>

Goro Fuji blogged about the original idea at based on the testing code taken from Test::Weaken.


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


Test::Pod, Test::UseAllModules, Test::Inline, Test::Snippet