A collection of data generators like those seen in property-based testing. This is where the name came from (https://new.wordsmith.org/anagram/anagram.cgi?anagram=data+generators&t=500&a=n).
The test module OrangeadeTest declares the public API which should change as we introduce generators.
If we intend a module and function to be part of our public API (i.e. one that a user will use) then we list it in the "API" test case.
This way we have it documented in one place.
It's listed under this particular test module because the API is all in the Orangeade name-space.