A plugin which allows to jump between the module and its tests in a mix project. By default the keybinding for the toggle is with Alt-g Alt-t (mnemonic for "Goto Test").
If you want to change the default shortcut you can open Atom -> Keymap and enter the following:
'atom-text-editor[data-grammar="source elixir"]':
"alt-g alt-b": "elixir-jump-around:toggle-test-file"This is going to change the shortcut to be Alt-g Alt-b