patch 9.0.2135: No test for mode() when executing Ex commands

Problem:  No test for mode() when executing Ex commands
Solution: Add some test cases and simplify several other test cases.
          Also add a few more test cases for ModeChanged.

closes: #13588

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/evalfunc.c b/src/evalfunc.c
index fa27d0d..b0b9750 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -9733,7 +9733,7 @@
     if (in_vim9script() && check_for_string_arg(argvars, 0) == FAIL)
 	return;
 
-    // seting an environment variable may be dangerous, e.g. you could
+    // setting an environment variable may be dangerous, e.g. you could
     // setenv GCONV_PATH=/tmp and then have iconv() unexpectedly call
     // a shell command using some shared library:
     if (check_restricted() || check_secure())
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 0652a6f..cecb55a 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -3780,8 +3780,6 @@
   call assert_equal(len(g:mode_seq) - 1, g:index)
   call assert_equal(2, g:n_to_c)
   call assert_equal(2, g:c_to_n)
-  unlet g:n_to_c
-  unlet g:c_to_n
 
   let g:n_to_v = 0
   au ModeChanged n:v let g:n_to_v += 1
@@ -3792,8 +3790,10 @@
   call assert_equal(len(g:mode_seq) - 1, g:index)
   call assert_equal(1, g:n_to_v)
   call assert_equal(1, g:v_to_n)
-  unlet g:n_to_v
-  unlet g:v_to_n
+
+  let g:mode_seq += ['c', 'cr', 'c', 'cr', 'n']
+  call feedkeys(":\<Insert>\<Insert>\<Insert>\<CR>", 'tnix')
+  call assert_equal(len(g:mode_seq) - 1, g:index)
 
   au! ModeChanged
   delfunc TestMode
@@ -3808,6 +3808,10 @@
   unlet! g:i_to_n
   unlet! g:nori_to_any
   unlet! g:i_to_any
+  unlet! g:n_to_c
+  unlet! g:c_to_n
+  unlet! g:n_to_v
+  unlet! g:v_to_n
 endfunc
 
 func Test_recursive_ModeChanged()
diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index 4cde9e4..7bfe7fa 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -755,7 +755,7 @@
   " Only complete from the current buffer.
   set complete=.
 
-  inoremap <F2> <C-R>=Save_mode()<CR>
+  noremap! <F2> <C-R>=Save_mode()<CR>
   xnoremap <F2> <Cmd>call Save_mode()<CR>
 
   normal! 3G
@@ -914,17 +914,24 @@
   exe "normal g\<C-H>\<C-O>\<F2>\<Esc>"
   call assert_equal("\<C-V>-\<C-V>s", g:current_modes)
 
-  call feedkeys(":echo \<C-R>=Save_mode()\<C-U>\<CR>", 'xt')
+  call feedkeys(":\<F2>\<CR>", 'xt')
   call assert_equal('c-c', g:current_modes)
-  call feedkeys(":\<insert>\<C-r>=Save_mode()\<CR>",'xt')
+  call feedkeys(":\<Insert>\<F2>\<CR>", 'xt')
   call assert_equal("c-cr", g:current_modes)
-  call feedkeys("gQecho \<C-R>=Save_mode()\<CR>\<CR>vi\<CR>", 'xt')
+  call feedkeys("gQ\<F2>vi\<CR>", 'xt')
   call assert_equal('c-cv', g:current_modes)
-  call feedkeys("gQ\<insert>\<C-r>=Save_mode()\<CR>",'xt')
+  call feedkeys("gQ\<Insert>\<F2>vi\<CR>", 'xt')
   call assert_equal("c-cvr", g:current_modes)
+
+  " Executing commands in Vim Ex mode should return "cv", never "cvr",
+  " as Cmdline editing has already ended.
+  call feedkeys("gQcall Save_mode()\<CR>vi\<CR>", 'xt')
+  call assert_equal('c-cv', g:current_modes)
+  call feedkeys("gQ\<Insert>call Save_mode()\<CR>vi\<CR>", 'xt')
+  call assert_equal('c-cv', g:current_modes)
+
   call feedkeys("Qcall Save_mode()\<CR>vi\<CR>", 'xt')
   call assert_equal('c-ce', g:current_modes)
-  " How to test Ex mode?
 
   " Test mode in operatorfunc (it used to be Operator-pending).
   set operatorfunc=OperatorFunc
@@ -939,14 +946,15 @@
   call assert_equal('n-niR', g:current_modes)
   execute "normal! gR\<C-o>g@l\<Esc>"
   call assert_equal('n-niV', g:current_modes)
-  " Test statusline updates for overstike mode
+
+  " Test statusline updates for overstrike mode
   if CanRunVimInTerminal()
     let buf = RunVimInTerminal('', {'rows': 12})
     call term_sendkeys(buf, ":set laststatus=2 statusline=%!mode(1)\<CR>")
     call term_sendkeys(buf, ":")
     call TermWait(buf)
     call VerifyScreenDump(buf, 'Test_mode_1', {})
-    call term_sendkeys(buf, "\<insert>")
+    call term_sendkeys(buf, "\<Insert>")
     call TermWait(buf)
     call VerifyScreenDump(buf, 'Test_mode_2', {})
     call StopVimInTerminal(buf)
@@ -971,7 +979,7 @@
   endif
 
   bwipe!
-  iunmap <F2>
+  unmap! <F2>
   xunmap <F2>
   set complete&
   set operatorfunc&
diff --git a/src/version.c b/src/version.c
index ae53626..55fbcc5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2135,
+/**/
     2134,
 /**/
     2133,