From 3cd9422c4c43fc7f4e6397a2b07a9ab05d4026cf Mon Sep 17 00:00:00 2001
From: "Justin M. Keyes" <justinkz@gmail.com>
Date: Sat, 6 Apr 2019 23:28:05 +0200
Subject: vim-patch:8.1.1113: making an autocommand trigger once is not so easy

Problem:    Making an autocommand trigger once is not so easy.
Solution:   Add the ++once argument.  Also add ++nested as an alias for
            "nested". (Justin M. Keyes, closes vim/vim#4100)
https://github.com/vim/vim/commit/eb93f3f0e2b2ae65c5c3f55be3e62d64e3066f35
---
 src/nvim/testdir/test_autocmd.vim | 70 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)

(limited to 'src/nvim/testdir')

diff --git a/src/nvim/testdir/test_autocmd.vim b/src/nvim/testdir/test_autocmd.vim
index 7a6c9478ca..6d4c54bbf9 100644
--- a/src/nvim/testdir/test_autocmd.vim
+++ b/src/nvim/testdir/test_autocmd.vim
@@ -1308,3 +1308,73 @@ func Test_Changed_FirstTime()
   call delete('Xchanged.txt')
   bwipe!
 endfunc
+
+func Test_autocmd_nested()
+  let g:did_nested = 0
+  augroup Testing
+    au WinNew * edit somefile
+    au BufNew * let g:did_nested = 1
+  augroup END
+  split
+  call assert_equal(0, g:did_nested)
+  close
+  bwipe! somefile
+
+  " old nested argument still works
+  augroup Testing
+    au!
+    au WinNew * nested edit somefile
+    au BufNew * let g:did_nested = 1
+  augroup END
+  split
+  call assert_equal(1, g:did_nested)
+  close
+  bwipe! somefile
+
+  " New ++nested argument works
+  augroup Testing
+    au!
+    au WinNew * ++nested edit somefile
+    au BufNew * let g:did_nested = 1
+  augroup END
+  split
+  call assert_equal(1, g:did_nested)
+  close
+  bwipe! somefile
+
+  augroup Testing
+    au!
+  augroup END
+
+  call assert_fails('au WinNew * ++nested ++nested echo bad', 'E983:')
+  call assert_fails('au WinNew * nested nested echo bad', 'E983:')
+endfunc
+
+func Test_autocmd_once()
+  " Without ++once WinNew triggers twice
+  let g:did_split = 0
+  augroup Testing
+    au WinNew * let g:did_split += 1
+  augroup END
+  split
+  split
+  call assert_equal(2, g:did_split)
+  call assert_true(exists('#WinNew'))
+  close
+  close
+
+  " With ++once WinNew triggers once
+  let g:did_split = 0
+  augroup Testing
+    au!
+    au WinNew * ++once let g:did_split += 1
+  augroup END
+  split
+  split
+  call assert_equal(1, g:did_split)
+  call assert_false(exists('#WinNew'))
+  close
+  close
+
+  call assert_fails('au WinNew * ++once ++once echo bad', 'E983:')
+endfunc
-- 
cgit