Disclaimer

This is my first attempt at any elisp whatsoever, so there are bound to be kinks in the system. If you discover an issue, feel free to email me at samlopes89@gmail.com or, better yet, fork the repo, perform the fix, and submit a pull request (bonus points for topic branches!).

Installation

First, you'll have to install this package's dependencies. go-check-mode relies on:

1. go-mode: go-mode should be installed and working properly for all go-related files. go-mode should come with go itself, but you can also fetch an improved version here
2. go-check plugin: in order to perform fine-grained testing (i.e. run a single test instead of all tests, for instance), go-check-mode depends (not surprisingly) on the gocheck library

Once all dependcies are in place, go ahead and install go-check-mode on the machine of your choice:

1. Either git clone this repo or simply download the raw go-check-mode.el file, whichever strikes your fancy

2. Put go-check-mode.el somewhere on Emac's load path so it can be found by those who seek it

3. Activate the mode itself by adding the following require line in your .emacs file

   `(require 'go-check-mode)`
   

4. Bask in the glory that is TDD without having to bail out of the marvelous world of Emacs to run your specs

Customizations

The following variables can be customized to better suite your workflow (M-x customize-group <RET> go-check-mode <RET>):

1. go-check-key-command-prefix: go-check-mode uses C-c , as its keymap prefix command by default, but this is configurable to anything of your choosing
2. go-check-runner: go-check-mode normally runs tests by calling out to go test via Emacs' absurdly powerful compilation-mode. You can change the go test command by setting go-check-runner to something else. Of course, note that whatever this command turns out to be, it must support gocheck's CLI flags (mainly -gocheck.f, -gocheck.v, and -gocheck.vv)

Remember, with great power comes great responsibility! Configure at your own peril.

Command overview

The keybindings made available by go-check-mode are listed below, assuming you've kept the default keymap prefix:

Key	Name	Behavior
C-c , a	go-check-all	run all tests within the current directory
C-c , s	go-check-single	run the test function the cursor is currently in. If the mark is active, run all tests found in region.
C-c , c	go-check-current	run all tests in the file
C-c , e	go-check-ad-hoc	run all tests that match the regexp provided in the mini-buffer
C-c , r	go-check-rerun	re-run the previous test command
C-c , t	go-check-toggle	toggle between a test file and its target file

Note that go-check-mode will make different keybindings available depending on what buffer is currently being visited (i.e. has focus):

• _Within an test.go file: all commands are available
• Within a regular .go file: only go-check-rerun, go-check-all, go-check-current, and go-check-toggle are available
• Within any other file: only go-check-rerun is available

Prefixes

One can use Emacs' prefix command arguments to have better control over the compilation process' output. Each command (save for go-check-rerun) can be run with one of the following prefixes:

1. C-1: run tests with the -gocheck.v flag
2. C-2: run tests with the -gocheck.vv flag
3. C-u: edit the compilation command immediately before the command itself is run

So, for instance, doing C-u C-c , s lets you modify the go-check-single command to include another test of your choosing.

Caveats

go-check-mode assumes a fairly flat file structure when it comes to how tests are organized. Basically, a test file is expected to be in the same directory as its target file and should be named identically to the target file except with a _test.go suffix instead of simply the .go extension.

Notes:

• Much thanks to rspec-mode, from which came inspiration for many of the ideas used here