-*- org -*-

<2018-07-14 Sat>

New phase for specifying prerequisites for executing the
test case

New phase [prerequisite]
executed after [conf]

Contains assertion-like instructions with result
PASS
VALIDATION_ERROR
HARD_ERROR
PREREQUISITE

Could include assert instructions, e.g.
 - exists
 - contents
 - dir-contents
 - run
 - $

(These instructions could be converted to boolean expressions,
to fit in both phases.)

Special instructions
 - check contents of env
 - check OS (Unix, Mac, Windows)
