lets say i have my codeception.yml test path to "test" and look for bootstrap in "framework/_boostrap.php". and i have one test suite called "unit".

my files will be laid out like this:

test/framework/_bootstrap.php
test/unit/framework/_bootstrap.php
test/unit/..../.../mytestfile.php

Codeception will load them in this order:

1.  test/framework/_bootstrap.php
2. test/unit/..../.../mytestfile.php
3. test/unit/framework/_bootstrap.php

Additionally, if I declare any dataProvider methods in the test file, mytestfile.php, those methods will be called before test/unit/framework/_bootstrap.php is loaded.