commit https://github.com/vim/vim/commit/9fe885e49ade94e6277db0dd18a5bbc1c94c60c4 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Mar 8 16:06:55 2016 +0100 patch 7.4.1515 Problem: Channel test is a bit flaky. Solution: Instead of a fixed sleep time wait until an expression evaluates to true.

Test A:
  - file name displayed: test://bar.txt
  - quickfix claims that the file name displayed is: test://bar.txt
Test B:
  - number of window open: 2
Test C:
  - 'buftype' of the location list window: quickfix
  - buffer displayed in the 2nd window: test://quux.txt