chore: setup luacov for test coverage (#85)

.gitignore

@@ -47,3 +47,9 @@ doc/tags
 
 # panvimdoc
 /panvimdoc/
+
+# luacov
+luacov.report
+luacov.report.index
+luacov.stats
+

.luacov

@@ -0,0 +1,20 @@
+return {
+  include = {
+    "lua/lualine$",
+    "lua/lualine_require$",
+    "lua/lualine%/.+$",
+  },
+  exclude = {
+    "lua/lualine/themes%/.+$",
+    "lua/lualine/extensions%/.+$",
+  },
+  modules = {
+    ["lualine"] = "lua/lualine.lua",
+    ["lualine_require"] = "lua/lualine_require.lua",
+    ["lualine.*"] = "lua/",
+  },
+  statsfile = 'luacov.stats',
+  reportfile = 'luacov.report',
+  includeuntestedfiles = true,
+}
+-- vim:ft=lua

Makefile

@@ -9,7 +9,25 @@ format:
 	@stylua --config-path=.stylua.toml lua/ examples/
 
 test:
-	@nvim --headless -u lua/tests/minimal_init.lua -c "PlenaryBustedDirectory lua/tests/ { minimal_init = './lua/tests/minimal_init.lua' }"
+	@mkdir -p tmp_home
+	@export XDG_DATA_HOME='./tmp_home' && \
+	export XDG_CONFIG_HOME='./tmp_home' && \
+	nvim --headless --noplugin --clean -u lua/tests/minimal_init.lua -c "lua require'plenary.test_harness'.test_directory( 'lua/tests/', { minimal_init = './lua/tests/minimal_init.lua' })"
+	@rmdir tmp_home
+
+# Install luacov & luacov-console from luarocks
+testcov:
+	@mkdir -p tmp_home
+	@export XDG_DATA_HOME='./tmp_home' && \
+	export XDG_CONFIG_HOME='./tmp_home' && \
+	export TEST_COV=true && \
+	nvim --headless --noplugin --clean -u lua/tests/minimal_init.lua -c "lua require'plenary.test_harness'.test_directory( 'lua/tests/', { minimal_init = './lua/tests/minimal_init.lua' })"
+	@luacov-console lua/
+	@luacov-console -s
+ifeq ($(NOCLEAN), )
+		@rm luacov.*
+endif
+	@rmdir tmp_home
 
 docgen:
 	@bash ./scripts/docgen.sh

lua/tests/minimal_init.lua

@@ -1,11 +1,12 @@
 -- Copyright (c) 2020-2021 shadmansaleh
 -- MIT license, see LICENSE for more details.
 
+if os.getenv('TEST_COV') then
+  require('luacov')
+end
 -- load lualine and plenary
-vim.api.nvim_exec(
-  [[
+vim.cmd [[
   set rtp+=.
   set rtp+=../plenary.nvim
-]],
-  false
-)
+  runtime plugin/plenary.vim
+]]