feat(runtime): Allow lua to be used in colorschemes

* tests(runtime): move runtime/plugin tests to functional/lua/runtime_spec

test/functional/lua/runtime_spec.lua

@@ -0,0 +1,89 @@
+local helpers = require('test.functional.helpers')(after_each)
+
+local clear = helpers.clear
+local eq = helpers.eq
+local eval = helpers.eval
+local exec = helpers.exec
+local mkdir_p = helpers.mkdir_p
+local rmdir = helpers.rmdir
+local write_file = helpers.write_file
+
+describe('runtime:', function()
+  local xhome = 'Xhome'
+  local pathsep = helpers.get_pathsep()
+  local xconfig = xhome .. pathsep .. 'Xconfig'
+
+  before_each(function()
+    clear()
+    mkdir_p(xconfig .. pathsep .. 'nvim')
+  end)
+
+  after_each(function()
+    rmdir(xhome)
+  end)
+
+  describe('plugin', function()
+    it('loads plugin/*.lua from XDG config home', function()
+      local plugin_folder_path = table.concat({xconfig, 'nvim', 'plugin'}, pathsep)
+      local plugin_file_path = table.concat({plugin_folder_path, 'plugin.lua'}, pathsep)
+      mkdir_p(plugin_folder_path)
+      write_file(plugin_file_path, [[ vim.g.lua_plugin = 1 ]])
+
+      clear{ args_rm={'-u' }, env={ XDG_CONFIG_HOME=xconfig }}
+
+      eq(1, eval('g:lua_plugin'))
+      rmdir(plugin_folder_path)
+    end)
+
+
+    it('loads plugin/*.lua from start plugins', function()
+      local plugin_path = table.concat({xconfig, 'nvim', 'pack', 'catagory',
+      'start', 'test_plugin'}, pathsep)
+      local plugin_folder_path = table.concat({plugin_path, 'plugin'}, pathsep)
+      local plugin_file_path = table.concat({plugin_folder_path, 'plugin.lua'},
+      pathsep)
+      mkdir_p(plugin_folder_path)
+      write_file(plugin_file_path, [[vim.g.lua_plugin = 2]])
+
+      clear{ args_rm={'-u' }, env={ XDG_CONFIG_HOME=xconfig }}
+
+      eq(2, eval('g:lua_plugin'))
+      rmdir(plugin_path)
+    end)
+  end)
+
+  describe('colors', function()
+    it('loads lua colorscheme', function()
+      local colorscheme_folder = table.concat({xconfig, 'nvim', 'colors'},
+                                                   pathsep)
+      local colorscheme_file = table.concat({colorscheme_folder, 'new_colorscheme.lua'},
+                                            pathsep)
+      mkdir_p(colorscheme_folder)
+      write_file(colorscheme_file, [[vim.g.lua_colorscheme = 1]])
+
+      clear{ args_rm={'-' }, env={ XDG_CONFIG_HOME=xconfig }}
+      exec('colorscheme new_colorscheme')
+
+      eq(1, eval('g:lua_colorscheme'))
+      rmdir(colorscheme_folder)
+    end)
+
+    it('loads vim colorscheme when both lua and vim version exist', function()
+      local colorscheme_folder = table.concat({xconfig, 'nvim', 'colors'},
+                                                   pathsep)
+      local colorscheme_file = table.concat({colorscheme_folder, 'new_colorscheme'},
+                                            pathsep)
+      mkdir_p(colorscheme_folder)
+      write_file(colorscheme_file..'.vim', [[let g:colorscheme = 'vim']])
+      write_file(colorscheme_file..'.lua', [[vim.g.colorscheme = 'lua']])
+
+      clear{ args_rm={'-u' }, env={ XDG_CONFIG_HOME=xconfig }}
+      exec('colorscheme new_colorscheme')
+
+      eq('vim', eval('g:colorscheme'))
+      rmdir(colorscheme_folder)
+    end)
+  end)
+
+end)
+