Example of sandboxed tests for Lua scripts using isolated field environments for sandboxing.
Tested and working with luajit/5.1, and 5.4.4.
lunit.lua - the main file, provides the LUnit global. See example.lua for a usage example, which tests testable.lua.
assertions.lua - provides the Assertions global table. (Included by lunit.lua)
lib.lua - general helpers abstracted out for organizational purposes. (Included by lunit.lua)