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README

NAME

Test2 - Framework for writing test tools that all work together.

DESCRIPTION

Test2 is a new testing framework produced by forking Test::Builder,
    completely refactoring it, adding many new features and capabilities.

WHAT IS NEW?

Easier to test new testing tools.

From the beginning Test2 was built with introspection capabilities.
      With Test::Builder it was difficult at best to capture test tool
      output for verification. Test2 Makes it easy with
      Test2::API::intercept().

Better diagnostics capabilities.

Test2 uses an Test2::API::Context object to track filename, line
      number, and tool details. This object greatly simplifies tracking for
      where errors should be reported.

Event driven.

Test2 based tools produce events which get passed through a
      processing system before being output by a formatter. This event
      system allows for rich plugin and extension support.

More complete API.

Test::Builder only provided a handful of methods for generating lines
      of TAP. Test2 took inventory of everything people were doing with
      Test::Builder that required hacking it up. Test2 made public API
      functions for nearly all the desired functionality people didn't
      previously have.

Support for output other than TAP.

Test::Builder assumed everything would end up as TAP. Test2 makes no
      such assumption. Test2 provides ways for you to specify alternative
      and custom formatters.

Subtest implementation is more sane.

The Test::Builder implementation of subtests was certifiably insane.
      Test2 uses a stacked event hub system that greatly improves how
      subtests are implemented.

Support for threading/forking.

Test2 support for forking and threading can be turned on using
      Test2::IPC. Once turned on threading and forking operate sanely and
      work as one would expect.

GETTING STARTED

If you are interested in writing tests using new tools then you should
    look at Test2::Suite. Test2::Suite is a separate cpan distribution that
    contains many tools implemented on Test2.

If you are interested in writing new tools you should take a look at
    Test2::API first.

NAMESPACE LAYOUT

This describes the namespace layout for the Test2 ecosystem. Not all
    the namespaces listed here are part of the Test2 distribution, some are
    implemented in Test2::Suite.

Test2::Tools::

This namespace is for sets of tools. Modules in this namespace should
    export tools like ok() and is(). Most things written for Test2 should
    go here. Modules in this namespace MUST NOT export subs from other
    tools. See the "Test2::Bundle::" namespace if you want to do that.

Test2::Plugin::

This namespace is for plugins. Plugins are modules that change or
    enhance the behavior of Test2. An example of a plugin is a module that
    sets the encoding to utf8 globally. Another example is a module that
    causes a bail-out event after the first test failure.

Test2::Bundle::

This namespace is for bundles of tools and plugins. Loading one of
    these may load multiple tools and plugins. Modules in this namespace
    should not implement tools directly. In general modules in this
    namespace should load tools and plugins, then re-export things into the
    consumers namespace.

Test2::Require::

This namespace is for modules that cause a test to be skipped when
    conditions do not allow it to run. Examples would be modules that skip
    the test on older perls, or when non-essential modules have not been
    installed.

Test2::Formatter::

Formatters live under this namespace. Test2::Formatter::TAP is the only
    formatter currently. It is acceptable for third party distributions to
    create new formatters under this namespace.

Test2::Event::

Events live under this namespace. It is considered acceptable for third
    party distributions to add new event types in this namespace.

Test2::Hub::

Hub subclasses (and some hub utility objects) live under this
    namespace. It is perfectly reasonable for third party distributions to
    add new hub subclasses in this namespace.

Test2::IPC::

The IPC subsystem lives in this namespace. There are not many good
    reasons to add anything to this namespace, with exception of IPC
    drivers.

Test2::IPC::Driver::

IPC drivers live in this namespace. It is fine to create new IPC
    drivers and to put them in this namespace.

Test2::Util::

This namespace is for general utilities used by testing tools. Please
    be considerate when adding new modules to this namespace.

Test2::API::

This is for Test2 API and related packages.

Test2::

The Test2:: namespace is intended for extensions and frameworks. Tools,
    Plugins, etc should not go directly into this namespace. However
    extensions that are used to build tools and plugins may go here.

In short: If the module exports anything that should be run directly by
    a test script it should probably NOT go directly into Test2::XXX.

SEE ALSO

Test2::API - Primary API functions.

Test2::API::Context - Detailed documentation of the context object.

Test2::IPC - The IPC system used for threading/fork support.

Test2::Formatter - Formatters such as TAP live here.

Test2::Event - Events live in this namespace.

Test2::Hub - All events eventually funnel through a hub. Custom hubs
    are how intercept() and run_subtest() are implemented.

CONTACTING US

Many Test2 developers and users lurk on irc://irc.perl.org/#perl-qa and
    irc://irc.perl.org/#toolchain. We also have a slack team that can be
    joined by anyone with an @cpan.org email address
    https://perl-test2.slack.com/ If you do not have an @cpan.org email you
    can ask for a slack invite by emailing Chad Granum <exodist@cpan.org>.

SOURCE

The source code repository for Test2 can be found at
    http://github.com/Test-More/test-more/.

MAINTAINERS

Chad Granum <exodist@cpan.org>

AUTHORS

Chad Granum <exodist@cpan.org>

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

See http://dev.perl.org/licenses/

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