PHPSpec

PHPUnit

The PHP Unit Testing framework.

Mockery

Mockery is a simple yet flexible PHP mock object framework for use in unit testing with PHPUnit, PHPSpec or any other testing framework. Its core goal is to offer a test double framework with a succinct API capable of clearly defining all possible object operations and interactions using a human readable Domain Specific Language (DSL).

Prophecy

Highly opinionated mocking framework for PHP 5.3+

Codeception

Full-stack testing PHP framework