The Perl 5 module Test::Assertions provides a convenient set of
tools for constructing tests, such as unit tests or run-time
assertion checks (like C's ASSERT macro).  Unlike some of the Test::
modules available on CPAN, Test::Assertions is not limited to unit
test scripts; for example it can be used to check output is as
expected within a benchmarking script.  When it is used for unit
tests, it generates output in the standard form for CPAN unit
testing (under Test::Harness).