patch 8.0.1771: in tests, when WaitFor() fails it doesn't say why commit https://github.com/vim/vim/commit/50182fa84e20a0547f3e2bd6683ef799fcd27855 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Apr 28 21:34:40 2018 +0200 patch 8.0.1771: in tests, when WaitFor() fails it doesn't say why Problem: In tests, when WaitFor() fails it doesn't say why. (James McCoy) Solution: Add WaitForAssert(), which produces an assert error when it fails.

" Settings for test script execution
" Always use "COMMAND.COM", don't use the value of "$SHELL".
set shell=c:\COMMAND.COM shellquote= shellxquote= shellcmdflag=/c shellredir=>
" This is used only when the +eval feature is available.
if executable("cmd.exe")
   set shell=cmd.exe
endif

source setup.vim