vim-snipmate is a really useful Vim plugin that adds support for custom autocompletion. vim-snippets adds a bunch of useful snippets for various languages.
This helps me save keystrokes. For example, writing:
pry
And pressing <TAB> will autocomplete this to:
require "pry"; binding.pry
There's other useful snippets, for defining classes, methods or test cases.
I've noticed I use focus a lot, in order to run
a single test. These plugins don't come with a snippet
for that, so I needed to write my own custom snippet.
I needed to place this in ~/.vim/after/snippets/_.snippets:
snippet f
focus
After I did this, pressing f<TAB> autocompletes to focus.