fix(excmd): make :def unknown rather than unimplemented (#23150)

1 files changed, 15 insertions, 1 deletions

diff --git a/test/functional/ex_cmds/excmd_spec.lua b/test/functional/ex_cmds/excmd_spec.lua
index e243f3c524..b313d6428c 100644
--- a/test/functional/ex_cmds/excmd_spec.lua
+++ b/test/functional/ex_cmds/excmd_spec.lua
@@ -2,6 +2,7 @@ local helpers = require("test.functional.helpers")(after_each)
 local command = helpers.command
 local eq = helpers.eq
 local clear = helpers.clear
+local funcs = helpers.funcs
 local pcall_err = helpers.pcall_err
 local assert_alive = helpers.assert_alive
 
@@ -26,5 +27,18 @@ describe('Ex cmds', function()
       pcall_err(command, ':bdelete 9999999999999999999999999999999999999999'))
     assert_alive()
   end)
-end)
 
+  it(':def is an unknown command #23149', function()
+    eq('Vim:E492: Not an editor command: def', pcall_err(command, 'def'))
+    eq(1, funcs.exists(':d'))
+    eq('delete', funcs.fullcommand('d'))
+    eq(1, funcs.exists(':de'))
+    eq('delete', funcs.fullcommand('de'))
+    eq(0, funcs.exists(':def'))
+    eq('', funcs.fullcommand('def'))
+    eq(1, funcs.exists(':defe'))
+    eq('defer', funcs.fullcommand('defe'))
+    eq(2, funcs.exists(':defer'))
+    eq('defer', funcs.fullcommand('defer'))
+  end)
+end)