Test::MockObject allows you to create objects that conform to particular interfaces with very little code. You don't have to reimplement the behavior, just the input and the output.

This Perl module is intended to easily test network connectivity to non-local Internet resources before functional tests begin. If the sockets cannot connect to the specified hosts and ports, the exception is caught and reported, and the tests skipped.

This module is a collection of tests useful for dealing with UTF-8 strings in Perl. This module has two types of tests: The validity tests check if a string is valid and not corrupt, whereas the characteristics tests will check that string has a given set of characteristics.

Test::YAML is a subclass of Test::Base with YAML specific support.

Test::Version checks to ensure that all modules have a version defined, and that the version is valid.

Test::File provides a collection of test utilities for file attributes.

This Perl testing library focuses on testing and working with XPath expressions, most likely in the context of XML document processing.

Test::Simple contains basic utilities for writing tests.

Test::TrailingSpace tests for trailing spaces in Perl source files.

Test::Tester allows testing of test modules based on Test::Builder with a minimum of effort.

Testing code can involve making sure that files are created and deleted as expected. Doing this manually can be error prone, as it's easy to forget a file, or miss that some unexpected file was added. This module simplifies maintaining test directories by tracking their status as they are modified or tested with this API, making it simple to test both individual files, as well as to verify that there are no missing or unknown files.

This module can test routines that manipulate random numbers by providing a known output from rand. Given a list of seeds with srand, it will return each in turn. After seeded random numbers are exhausted, it will always return 0. Seed numbers must be of a form that meets the expected output from rand as called with no arguments: they must be between 0 (inclusive) and 1 (exclusive). In order to facilitate generating and testing a nearly-one number, this module exports the function oneish, which returns a number just fractionally less than one.

Test::More::UTF8 is a simple extension for the widely used Test::More module. By default, it will do a binmode :utf8 on all of Test::Builder's output handles thus enabling the easy use flagged strings without warnings like "Wide character in print …"

Test::Output provides a simple interface for testing output sent to STDOUT or STDERR. A number of different utilities are included to try and be as flexible as possible to the tester.

This module contains a collection of acceptance tests for implementations of Future::IO.

When used in a test script Test::Distribution goes through all the modules in your distribution, checks their POD, checks that they compile successfully and checks that they all define a $VERSION. In addition, this module performs a number of tests on the distribution itself. It checks that the distributed files match the SIGNATURE file, if that file exists. It checks that the distribution is not missing any core description files. It also checks that the complete set of pre-requisite packages are listed in the Makefile.PL file.

This module lets you check your module's namespaces for imported functions you might have forgotten to remove with namespace::autoclean or namespace::clean and are therefore available to be called as methods, which usually isn't want you want.

Test::RunValgind checks weather Valgrind does not detect errors (such as memory leaks) in an arbitrary binary executable.

Test::NoTabs lets you check the presence of tabs in your perl code.

Test::MockModule lets you temporarily redefine subroutines in other packages for the purposes of unit testing. A Test::MockModule object is set up to mock subroutines for a given module. The mocked object remembers the original subroutine so it can be easily restored. This happens automatically when all MockModule objects for the given module go out of scope, or when you unmock() the subroutine.

Fennec ties together several testing related modules and enhances their functionality in ways you don't get loading them individually. Fennec::Lite takes a minimalist approach to do for Fennec what Mouse does for Moose.

This module provides a test that checks all dependencies have been installed properly.

This module tests that commands given particular arguments result in particular outputs by way of the exit status word, standard output, and standard error.

Check POD files for errors or warnings in a test file, using Pod::Simple to do the heavy lifting.