neovim/test/unit/preload.lua

-- Modules loaded here will not be cleared and reloaded by Busted.
-- Busted started doing this to help provide more isolation.  See issue #62
-- for more information about this.
local ffi = require('ffi')
local helpers = require('test.unit.helpers')(nil)
local lfs = require('lfs')
local preprocess = require('test.unit.preprocess')