1 files changed, 181 insertions, 1 deletions
diff --git a/test/functional/options/defaults_spec.lua b/test/functional/options/defaults_spec.lua
index a36939b0bd..8eec6ad8bf 100644
--- a/test/functional/options/defaults_spec.lua
+++ b/test/functional/options/defaults_spec.lua
@@ -1,7 +1,12 @@
 local helpers = require('test.functional.helpers')(after_each)
+
 local Screen = require('test.functional.ui.screen')
-local eval, eq = helpers.eval, helpers.eq
+
+local meths = helpers.meths
 local execute = helpers.execute
+local clear = helpers.clear
+local eval = helpers.eval
+local eq = helpers.eq
 
 local function init_session(...)
   local args = { helpers.nvim_prog, '-i', 'NONE', '--embed',
@@ -77,4 +82,179 @@ describe('startup defaults', function()
   end)
 end)
 
+describe('XDG-based defaults', function()
+  -- Need to be in separate describe() block to not run clear() twice.
+  -- Do not put before_each() here for the same reasons.
+  describe('with too long XDG variables', function()
+    before_each(function()
+      clear({env={
+        XDG_CONFIG_HOME=('/x'):rep(4096),
+        XDG_CONFIG_DIRS=(('/a'):rep(2048)
+                         .. ':' .. ('/b'):rep(2048)
+                         .. (':/c'):rep(512)),
+        XDG_DATA_HOME=('/X'):rep(4096),
+        XDG_DATA_DIRS=(('/A'):rep(2048)
+                       .. ':' .. ('/B'):rep(2048)
+                       .. (':/C'):rep(512)),
+      }})
+    end)
+
+    it('are correctly set', function()
+      eq((('/x'):rep(4096) .. '/nvim'
+          .. ',' .. ('/a'):rep(2048) .. '/nvim'
+          .. ',' .. ('/b'):rep(2048) .. '/nvim'
+          .. (',' .. '/c/nvim'):rep(512)
+          .. ',' .. ('/X'):rep(4096) .. '/nvim/site'
+          .. ',' .. ('/A'):rep(2048) .. '/nvim/site'
+          .. ',' .. ('/B'):rep(2048) .. '/nvim/site'
+          .. (',' .. '/C/nvim/site'):rep(512)
+          .. ',' .. eval('$VIMRUNTIME')
+          .. (',' .. '/C/nvim/site/after'):rep(512)
+          .. ',' .. ('/B'):rep(2048) .. '/nvim/site/after'
+          .. ',' .. ('/A'):rep(2048) .. '/nvim/site/after'
+          .. ',' .. ('/X'):rep(4096) .. '/nvim/site/after'
+          .. (',' .. '/c/nvim/after'):rep(512)
+          .. ',' .. ('/b'):rep(2048) .. '/nvim/after'
+          .. ',' .. ('/a'):rep(2048) .. '/nvim/after'
+          .. ',' .. ('/x'):rep(4096) .. '/nvim/after'
+      ), meths.get_option('runtimepath'))
+      meths.command('set runtimepath&')
+      meths.command('set backupdir&')
+      meths.command('set directory&')
+      meths.command('set undodir&')
+      meths.command('set viewdir&')
+      eq((('/x'):rep(4096) .. '/nvim'
+          .. ',' .. ('/a'):rep(2048) .. '/nvim'
+          .. ',' .. ('/b'):rep(2048) .. '/nvim'
+          .. (',' .. '/c/nvim'):rep(512)
+          .. ',' .. ('/X'):rep(4096) .. '/nvim/site'
+          .. ',' .. ('/A'):rep(2048) .. '/nvim/site'
+          .. ',' .. ('/B'):rep(2048) .. '/nvim/site'
+          .. (',' .. '/C/nvim/site'):rep(512)
+          .. ',' .. eval('$VIMRUNTIME')
+          .. (',' .. '/C/nvim/site/after'):rep(512)
+          .. ',' .. ('/B'):rep(2048) .. '/nvim/site/after'
+          .. ',' .. ('/A'):rep(2048) .. '/nvim/site/after'
+          .. ',' .. ('/X'):rep(4096) .. '/nvim/site/after'
+          .. (',' .. '/c/nvim/after'):rep(512)
+          .. ',' .. ('/b'):rep(2048) .. '/nvim/after'
+          .. ',' .. ('/a'):rep(2048) .. '/nvim/after'
+          .. ',' .. ('/x'):rep(4096) .. '/nvim/after'
+      ), meths.get_option('runtimepath'))
+      eq('.,' .. ('/X'):rep(4096) .. '/nvim/backup',
+         meths.get_option('backupdir'))
+      eq(('/X'):rep(4096) .. '/nvim/swap//', meths.get_option('directory'))
+      eq(('/X'):rep(4096) .. '/nvim/undo', meths.get_option('undodir'))
+      eq(('/X'):rep(4096) .. '/nvim/view', meths.get_option('viewdir'))
+    end)
+  end)
+
+  describe('with XDG variables that can be expanded', function()
+    before_each(function()
+      clear({env={
+        XDG_CONFIG_HOME='$XDG_DATA_HOME',
+        XDG_CONFIG_DIRS='$XDG_DATA_DIRS',
+        XDG_DATA_HOME='$XDG_CONFIG_HOME',
+        XDG_DATA_DIRS='$XDG_CONFIG_DIRS',
+      }})
+    end)
+
+    it('are not expanded', function()
+      eq(('$XDG_DATA_HOME/nvim'
+          .. ',$XDG_DATA_DIRS/nvim'
+          .. ',$XDG_CONFIG_HOME/nvim/site'
+          .. ',$XDG_CONFIG_DIRS/nvim/site'
+          .. ',' .. eval('$VIMRUNTIME')
+          .. ',$XDG_CONFIG_DIRS/nvim/site/after'
+          .. ',$XDG_CONFIG_HOME/nvim/site/after'
+          .. ',$XDG_DATA_DIRS/nvim/after'
+          .. ',$XDG_DATA_HOME/nvim/after'
+      ), meths.get_option('runtimepath'))
+      meths.command('set runtimepath&')
+      meths.command('set backupdir&')
+      meths.command('set directory&')
+      meths.command('set undodir&')
+      meths.command('set viewdir&')
+      eq(('$XDG_DATA_HOME/nvim'
+          .. ',$XDG_DATA_DIRS/nvim'
+          .. ',$XDG_CONFIG_HOME/nvim/site'
+          .. ',$XDG_CONFIG_DIRS/nvim/site'
+          .. ',' .. eval('$VIMRUNTIME')
+          .. ',$XDG_CONFIG_DIRS/nvim/site/after'
+          .. ',$XDG_CONFIG_HOME/nvim/site/after'
+          .. ',$XDG_DATA_DIRS/nvim/after'
+          .. ',$XDG_DATA_HOME/nvim/after'
+      ), meths.get_option('runtimepath'))
+      eq('.,$XDG_CONFIG_HOME/nvim/backup', meths.get_option('backupdir'))
+      eq('$XDG_CONFIG_HOME/nvim/swap//', meths.get_option('directory'))
+      eq('$XDG_CONFIG_HOME/nvim/undo', meths.get_option('undodir'))
+      eq('$XDG_CONFIG_HOME/nvim/view', meths.get_option('viewdir'))
+      meths.command('set all&')
+      eq(('$XDG_DATA_HOME/nvim'
+          .. ',$XDG_DATA_DIRS/nvim'
+          .. ',$XDG_CONFIG_HOME/nvim/site'
+          .. ',$XDG_CONFIG_DIRS/nvim/site'
+          .. ',' .. eval('$VIMRUNTIME')
+          .. ',$XDG_CONFIG_DIRS/nvim/site/after'
+          .. ',$XDG_CONFIG_HOME/nvim/site/after'
+          .. ',$XDG_DATA_DIRS/nvim/after'
+          .. ',$XDG_DATA_HOME/nvim/after'
+      ), meths.get_option('runtimepath'))
+      eq('.,$XDG_CONFIG_HOME/nvim/backup', meths.get_option('backupdir'))
+      eq('$XDG_CONFIG_HOME/nvim/swap//', meths.get_option('directory'))
+      eq('$XDG_CONFIG_HOME/nvim/undo', meths.get_option('undodir'))
+      eq('$XDG_CONFIG_HOME/nvim/view', meths.get_option('viewdir'))
+    end)
+  end)
+
+  describe('with commas', function()
+    before_each(function()
+      clear({env={
+        XDG_CONFIG_HOME=', , ,',
+        XDG_CONFIG_DIRS=',-,-,:-,-,-',
+        XDG_DATA_HOME=',=,=,',
+        XDG_DATA_DIRS=',≡,≡,:≡,≡,≡',
+      }})
+    end)
 
+    it('are escaped properly', function()
+      eq(('\\, \\, \\,/nvim'
+          .. ',\\,-\\,-\\,/nvim'
+          .. ',-\\,-\\,-/nvim'
+          .. ',\\,=\\,=\\,/nvim/site'
+          .. ',\\,≡\\,≡\\,/nvim/site'
+          .. ',≡\\,≡\\,≡/nvim/site'
+          .. ',' .. eval('$VIMRUNTIME')
+          .. ',≡\\,≡\\,≡/nvim/site/after'
+          .. ',\\,≡\\,≡\\,/nvim/site/after'
+          .. ',\\,=\\,=\\,/nvim/site/after'
+          .. ',-\\,-\\,-/nvim/after'
+          .. ',\\,-\\,-\\,/nvim/after'
+          .. ',\\, \\, \\,/nvim/after'
+      ), meths.get_option('runtimepath'))
+      meths.command('set runtimepath&')
+      meths.command('set backupdir&')
+      meths.command('set directory&')
+      meths.command('set undodir&')
+      meths.command('set viewdir&')
+      eq(('\\, \\, \\,/nvim'
+          .. ',\\,-\\,-\\,/nvim'
+          .. ',-\\,-\\,-/nvim'
+          .. ',\\,=\\,=\\,/nvim/site'
+          .. ',\\,≡\\,≡\\,/nvim/site'
+          .. ',≡\\,≡\\,≡/nvim/site'
+          .. ',' .. eval('$VIMRUNTIME')
+          .. ',≡\\,≡\\,≡/nvim/site/after'
+          .. ',\\,≡\\,≡\\,/nvim/site/after'
+          .. ',\\,=\\,=\\,/nvim/site/after'
+          .. ',-\\,-\\,-/nvim/after'
+          .. ',\\,-\\,-\\,/nvim/after'
+          .. ',\\, \\, \\,/nvim/after'
+      ), meths.get_option('runtimepath'))
+      eq('.,\\,=\\,=\\,/nvim/backup', meths.get_option('backupdir'))
+      eq('\\,=\\,=\\,/nvim/swap//', meths.get_option('directory'))
+      eq('\\,=\\,=\\,/nvim/undo', meths.get_option('undodir'))
+      eq('\\,=\\,=\\,/nvim/view', meths.get_option('viewdir'))
+    end)
+  end)
+end)