It could be called a BDD framework. All Codeception tests are written in a descriptive manner. Just by looking in the test body you can get a clear understanding of what is being tested and how it is performed. Even complex tests with many assertions are written in a simple PHP DSL.

We took a look into the Codeception structure. Most of the things you need were already generated by the `bootstrap` command. After you have reviewed the basic concepts and configurations, you can start writing your first scenarios.

If you are using a framework other than the ones listed here, create a module for it and share it with community.

PHPUnit tests is a first-class citizen in test suites. Whenever you need to write and execute unit tests, you don't need to install PHPUnit manually, but use a Codeception to execute them. Some nice features are added to common unit tests by integrating Codeception modules. For most of unit and integration testing PHPUnit tests are just enough. They are fast and easy to maintain. But when you need some advanced features like mocking, use the special Cest format, described in next chapters.

Codeception provides you with a cool DSL to simplify your unit tests. You are writing the scenario definitions, not the actual executed code. Behind the scenes all the dirty work is done by Codeception. You write only the testing logic.

Codeception has it's powers and it's limits. We believe Codeception's limitations keep your tests clean and narrative. Codeception makes writing bad code for tests more difficult. Codeception has simple but powerful tools to create stubs and mocks. Different modules can be attached to unit tests which, just for an example, will simplify database interactions.