Add a makefile for running unit tests (#671)

* Let tests run locally

* fix typos

* fix more typos

* add makefile

* actually add makefile

* remove make clean

.gitignore

@@ -39,4 +39,7 @@ luac.out
 *.x86_64
 *.hex
 
+# Vim swap files
+*.swp
+
 doc/tags

makefile

@@ -0,0 +1,9 @@
+test:
+	if [ ! -d ~/.local/share/nvim/site/pack/vendor/start/plenary.nvim ]; \
+	then \
+		git clone --depth 1 https://github.com/nvim-lua/plenary.nvim \
+			~/.local/share/nvim/site/pack/vendor/start/plenary.nvim; \
+		ln -f -s "$$(pwd)" ~/.local/share/nvim/site/pack/vendor/start; \
+	fi; \
+	nvim --headless --noplugin -u tests/minimal.vim \
+		-c "PlenaryBustedDirectory tests/ {minimal_init = 'tests/minimal.vim'}"