You probably got this package from:
http://simpletest.org/en/download.html
If there is no licence agreement with this package please download a version from the location above. You must read and accept that licence to use this software. The file is titled simply LICENSE.
What is it? It's a framework for unit testing, web site testing and mock objects for PHP 5.0.5+.
If you have used JUnit, you will find this PHP unit testing version very similar. Also included is a mock objects and server stubs generator. The stubs can have return values set for different arguments, can have sequences set also by arguments and can return items by reference. The mocks inherit all of this functionality and can also have expectations set, again in sequences and for different arguments.
A web tester similar in concept to JWebUnit is also included. There is no JavaScript or tables support, but forms, authentication, cookies and frames are handled.
You can see a release schedule at http://simpletest.org/en/overview.html which is also copied to the documentation folder with this release. A full PHPDocumenter API documentation exists at http://simpletest.org/api/.
The user interface is minimal in the extreme, but a lot of information flows from the test suite. After version 1.0 we will release a better web UI, but we are leaving XUL and GTK versions to volunteers as everybody has their own opinion on a good GUI, and we don't want to discourage development by shipping one with the toolkit. You can download an Eclipse plug-in separately.
The unit tests for SimpleTest itself can be run here:
test/unit_tests.php
And tests involving live network connections as well are here:
test/all_tests.php
The full tests will typically overrun the 8Mb limit often allowed to a PHP process. A workaround is to run the tests on the command with a custom php.ini file or with the switch -dmemory_limit=-1 if you do not have access to your server version.
The preferred way to install this extension is through composer.
Either run
php composer.phar require --prefer-dist garyjl/simpletest "*"
or add
"garyjl/simpletest": "*"
to the require section of your composer.json file.