What is a require?

A require is a Test2 module that will skip the current test if a condition is not met.

These are useful if you have tests that require other modules, or should only be run on specific platforms.

Test2::Require::AuthorTesting

Skip the test unless the AUTHOR_TESTING environment variable is set.

Test2::Require::EnvVar

Skip the test unless the specified environment variable is set.

Test2::Require::Fork

Test2::Require::RealFork

Only run tests on systems that can fork for real.

Checking yourself is not that hard, but does your intentions are not as clear: Did you actually want to run only when real forking is available, or did you intend to include emulated fork?

Test2::Require::Module

Only run the test if the required module (and optionally version) is installed.

Test2::Require::Perl

Skip the test unless the necessary version of perl is installed.

Test2::Require::Threads

Only run tests on perls that have threading enabled.

Checking for threads yourself is not as trivial as it may sound: