Using split panes

The most intuitive way for me to run tests is to use a tmux split pane. I simply split my screen between my editor and a shell that runs tests (npm test in this example). I’ve then set up a vim hotkey (,r for me) to quickly send “up enter” to the last tmux pane used.

" Repeat last command in the next tmux pane.
nnoremap <Leader>r :call <SID>TmuxRepeat()<CR>

function! s:TmuxRepeat()
  silent! exec "!tmux select-pane -l && tmux send up enter && tmux select-pane -l"


Even better, I’ve set up Ctrl-S as a “save-and-repeat” key to make it all happen in one keystroke:

inoremap <C-s> <Esc>:w<CR>:call <SID>TmuxRepeat()<CR>a
noremap  <C-s> :w<CR>:call <SID>TmuxRepeat()<CR>

Alternatively, you can use vim-dispatch, but it doesn’t support colors and can be disorienting.