vim-patch:8.1.0668: no test for overstrike mode in the command line

Problem:    No test for overstrike mode in the command line.
Solution:   Add a test. (Dominique Pelle, closes vim/vim#3742)
https://github.com/vim/vim/commit/c0676bab92bd6488e17d05a4a70dfff993ef524e

1 files changed, 29 insertions, 0 deletions

diff --git a/src/nvim/testdir/test_cmdline.vim b/src/nvim/testdir/test_cmdline.vim
index 26f1dcc333..75832a798c 100644
--- a/src/nvim/testdir/test_cmdline.vim
+++ b/src/nvim/testdir/test_cmdline.vim
@@ -522,4 +522,33 @@ func Test_setcmdpos()
   call assert_equal(1, setcmdpos(3))
 endfunc
 
+func Test_cmdline_overstrike()
+  let encodings = has('multi_byte') ? [ 'utf8' ] : [ 'latin1' ]
+  let encoding_save = &encoding
+
+  for e in encodings
+    exe 'set encoding=' . e
+
+    " Test overstrike in the middle of the command line.
+    call feedkeys(":\"01234\<home>\<right>\<right>ab\<right>\<insert>cd\<enter>", 'xt')
+    call assert_equal('"0ab1cd4', @:)
+
+    " Test overstrike going beyond end of command line.
+    call feedkeys(":\"01234\<home>\<right>\<right>ab\<right>\<insert>cdefgh\<enter>", 'xt')
+    call assert_equal('"0ab1cdefgh', @:)
+
+    " Test toggling insert/overstrike a few times.
+    call feedkeys(":\"01234\<home>\<right>ab\<right>\<insert>cd\<right>\<insert>ef\<enter>", 'xt')
+    call assert_equal('"ab0cd3ef4', @:)
+  endfor
+
+  if has('multi_byte')
+    " Test overstrike with multi-byte characters.
+    call feedkeys(":\"テキストエディタ\<home>\<right>\<right>ab\<right>\<insert>cd\<enter>", 'xt')
+    call assert_equal('"テabキcdエディタ', @:)
+  endif
+
+  let &encoding = encoding_save
+endfunc
+
 set cpo&