Each time you generate a class using the generator a corresponding test file is created. It is your duty to update it with assertions so your application’s files are fully tested.
To run the test suite, run
./strata test. A PHPUnit output will describe the details of the tests.
There is a bash script that will automate the validation of your changes made available through a Github Gist that you may find useful.
Download a copy of the script under ~/bin/tdd and give it
execute rights. Afterwards you may invoke the bash script before starting your work session. The script will switch between Gherkin or unit tests depending on the file that has triggered the changes.