From f25f42bf03b6cdc50dd85ec1dddd693aa71b6f50 Mon Sep 17 00:00:00 2001
From: Jan Edmund Lazo <janedmundlazo@hotmail.com>
Date: Sun, 7 Oct 2018 10:29:57 -0400
Subject: [PATCH] vim-patch:8.1.0453: MS-Windows: executable() is not reliable

Problem:    MS-Windows: executable() is not reliable.
Solution:   Use $PATHEXT properly. (Yasuhiro Matsumoto, closes vim/vim#3412)
https://github.com/vim/vim/commit/8295666dc2c65e42135b91d5c61e2a140d002333
---
 src/nvim/testdir/test_functions.vim | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/nvim/testdir/test_functions.vim b/src/nvim/testdir/test_functions.vim
index 92d966a334..acbbd522db 100644
--- a/src/nvim/testdir/test_functions.vim
+++ b/src/nvim/testdir/test_functions.vim
@@ -864,6 +864,19 @@ func Test_filewritable()
   bw!
 endfunc
 
+func Test_Executable()
+  if has('win32')
+    call assert_equal(1, executable('notepad'))
+    call assert_equal(1, executable('notepad.exe'))
+    call assert_equal(0, executable('notepad.exe.exe'))
+    call assert_equal(0, executable('shell32.dll'))
+    call assert_equal(0, executable('win.ini'))
+  elseif has('unix')
+    call assert_equal(1, executable('cat'))
+    call assert_equal(0, executable('dog'))
+  endif
+endfunc
+
 func Test_hostname()
   let hostname_vim = hostname()
   if has('unix')