Simple examples of tests.
This is awesome. Could you also put up a preview screen shot of the docs showing the rendered view of this? I obviously trust you that this works, however, it helps with scrollback if we were to refer to this diff at any point should something go wrong and it makes my job as a reviewer easier!
I would either elaborate in a sentence or two as to why this is true or take this out. I think we should let the system speak for itself, and if we want to call stuff out then we ought to demonstrate the differences which you are doing, but it is a bit distracting.
I love this example! Great work. RE above, could we maybe contrast why this would be hard to find in a different setup (like airflow where this solid would just be a block of code in an otherwise large PythonOperator?