vim-patch:8.2.0347: various code not covered by tests

Problem:    Various code not covered by tests.
Solution:   Add more test coverage. (Yegappan Lakshmanan, closes vim/vim#5720)
https://github.com/vim/vim/commit/91ffc8a5f5c7b1c6979b3352a12ed779d11173a9

Test_Ex_echo_backslash() is not applicable to Vim enhanced Ex mode.

1 files changed, 50 insertions, 2 deletions

diff --git a/src/nvim/testdir/test_cmdline.vim b/src/nvim/testdir/test_cmdline.vim
index b5ee5e802d..02f08ab20f 100644
--- a/src/nvim/testdir/test_cmdline.vim
+++ b/src/nvim/testdir/test_cmdline.vim
@@ -603,12 +603,22 @@ func Test_cmdline_paste()
   call feedkeys(":\"one\<C-R>\<C-X>two\<CR>", 'xt')
   call assert_equal('"onetwo', @:)
 
+  " Test for pasting register containing CTRL-H using CTRL-R and CTRL-R CTRL-R
   let @a = "xy\<C-H>z"
   call feedkeys(":\"\<C-R>a\<CR>", 'xt')
   call assert_equal('"xz', @:)
+  call feedkeys(":\"\<C-R>\<C-R>a\<CR>", 'xt')
+  call assert_equal("\"xy\<C-H>z", @:)
   call feedkeys(":\"\<C-R>\<C-O>a\<CR>", 'xt')
   call assert_equal("\"xy\<C-H>z", @:)
 
+  " Test for pasting register containing CTRL-V using CTRL-R and CTRL-R CTRL-R
+  let @a = "xy\<C-V>z"
+  call feedkeys(":\"\<C-R>=@a\<CR>\<cr>", 'xt')
+  call assert_equal('"xyz', @:)
+  call feedkeys(":\"\<C-R>\<C-R>=@a\<CR>\<cr>", 'xt')
+  call assert_equal("\"xy\<C-V>z", @:)
+
   call assert_beeps('call feedkeys(":\<C-R>=\<C-R>=\<Esc>", "xt")')
 
   bwipe!
@@ -1558,7 +1568,7 @@ endfunc
 func Test_cmdline_edit()
   let str = ":one two\<C-U>"
   let str ..= "one two\<C-W>\<C-W>"
-  let str ..= "one\<BS>\<C-H>\<Del>"
+  let str ..= "four\<BS>\<C-H>\<Del>\<kDel>"
   let str ..= "\<Left>five\<Right>"
   let str ..= "\<Home>two "
   let str ..= "\<C-Left>one "
@@ -1577,7 +1587,7 @@ func Test_cmdline_edit_rightleft()
   set rightleftcmd=search
   let str = "/one two\<C-U>"
   let str ..= "one two\<C-W>\<C-W>"
-  let str ..= "one\<BS>\<C-H>\<Del>"
+  let str ..= "four\<BS>\<C-H>\<Del>\<kDel>"
   let str ..= "\<Right>five\<Left>"
   let str ..= "\<Home>two "
   let str ..= "\<C-Right>one "
@@ -1638,6 +1648,44 @@ func Test_cmdline_inputmethod()
   %bwipe!
 endfunc
 
+" Test for opening the command-line window when too many windows are present
+func Test_cmdwin_fail_to_open()
+  " Open as many windows as possible
+  for i in range(100)
+    try
+      new
+    catch /E36:/
+      break
+    endtry
+  endfor
+  call assert_beeps('call feedkeys("q:\<CR>", "xt")')
+  only
+endfunc
+
+" Test for recursively getting multiple command line inputs
+func Test_cmdwin_multi_input()
+  call feedkeys(":\<C-R>=input('P: ')\<CR>\"cyan\<CR>\<CR>", 'xt')
+  call assert_equal('"cyan', @:)
+endfunc
+
+" Test for using CTRL-_ in the command line with 'allowrevins'
+func Test_cmdline_revins()
+  CheckNotMSWindows
+  CheckFeature rightleft
+  call feedkeys(":\"abc\<c-_>\<cr>", 'xt')
+  call assert_equal("\"abc\<c-_>", @:)
+  set allowrevins
+  call feedkeys(":\"abc\<c-_>xyz\<c-_>\<CR>", 'xt')
+  call assert_equal('"abcñèæ', @:)
+  set allowrevins&
+endfunc
+
+" Test for typing UTF-8 composing characters in the command line
+func Test_cmdline_composing_chars()
+  call feedkeys(":\"\<C-V>u3046\<C-V>u3099\<CR>", 'xt')
+  call assert_equal('"ゔ', @:)
+endfunc
+
 " Test for normal mode commands not supported in the cmd window
 func Test_cmdwin_blocked_commands()
   call assert_fails('call feedkeys("q:\<C-T>\<CR>", "xt")', 'E11:')