fix(vim.opt): Fix #14668 Now correctly handles unescaped commas in isfname style

2 files changed, 23 insertions, 0 deletions

diff --git a/test/functional/api/vim_spec.lua b/test/functional/api/vim_spec.lua
index 0c0f610401..91d2745130 100644
--- a/test/functional/api/vim_spec.lua
+++ b/test/functional/api/vim_spec.lua
@@ -2003,6 +2003,7 @@ describe('API', function()
 
     it('should have information about window options', function()
       eq({
+        allows_duplicates = true,
         commalist = false;
         default = "";
         flaglist = false;
@@ -2020,6 +2021,7 @@ describe('API', function()
 
     it('should have information about buffer options', function()
       eq({
+        allows_duplicates = true,
         commalist = false,
         default = "",
         flaglist = false,
@@ -2041,6 +2043,7 @@ describe('API', function()
       eq(false, meths.get_option'showcmd')
 
       eq({
+        allows_duplicates = true,
         commalist = false,
         default = true,
         flaglist = false,
diff --git a/test/functional/lua/vim_spec.lua b/test/functional/lua/vim_spec.lua
index cb94004872..ad0bb50c6e 100644
--- a/test/functional/lua/vim_spec.lua
+++ b/test/functional/lua/vim_spec.lua
@@ -1731,6 +1731,26 @@ describe('lua stdlib', function()
         ]]))
       end)
     end)
+
+    -- isfname=a,b,c,,,d,e,f
+    it('can handle isfname ,,,', function()
+      local result = exec_lua [[
+        vim.opt.isfname = "a,b,,,c"
+        return { vim.opt.isfname:get(), vim.api.nvim_get_option('isfname') }
+      ]]
+
+      eq({{",", "a", "b", "c"}, "a,b,,,c"}, result)
+    end)
+
+    -- isfname=a,b,c,^,,def
+    it('can handle isfname ,^,,', function()
+      local result = exec_lua [[
+        vim.opt.isfname = "a,b,^,,c"
+        return { vim.opt.isfname:get(), vim.api.nvim_get_option('isfname') }
+      ]]
+
+      eq({{"^,", "a", "b", "c"}, "a,b,^,,c"}, result)
+    end)
   end) -- vim.opt
 
   it('vim.cmd', function()