PhpSpec vs PHPUnit: What are the differences?
Developers describe PhpSpec as "A toolset for behavior driven development". It is a tool which can help you write clean and working PHP code using behaviour driven development or BDD. BDD is a technique derived from test-first development. On the other hand, PHPUnit is detailed as "Testing framework for PHP". PHPUnit is a programmer-oriented testing framework for PHP It is an instance of the xUnit architecture for unit testing frameworks..
PhpSpec and PHPUnit can be primarily classified as "Testing Frameworks" tools.
PHPUnit is an open source tool with 14.5K GitHub stars and 1.77K GitHub forks. Here's a link to PHPUnit's open source repository on GitHub.