patch 8.2.0023: command line editing not sufficiently tested

Problem:    Command line editing not sufficiently tested.
Solution:   Add more tests. (Dominique Pelle, closes #5374)
diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index 5297951..837ef63 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -419,7 +419,7 @@
   call delete('a', 'rf')
 endfunc
 
-func Test_paste_in_cmdline()
+func Test_cmdline_paste()
   let @a = "def"
   call feedkeys(":abc \<C-R>a ghi\<C-B>\"\<CR>", 'tx')
   call assert_equal('"abc def ghi', @:)
@@ -459,18 +459,37 @@
   bwipe!
 endfunc
 
-func Test_remove_char_in_cmdline()
-  call feedkeys(":abc def\<S-Left>\<Del>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"abc ef', @:)
+func Test_cmdline_remove_char()
+  let encoding_save = &encoding
 
-  call feedkeys(":abc def\<S-Left>\<BS>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"abcdef', @:)
+  for e in ['utf8', 'latin1']
+    exe 'set encoding=' . e
 
-  call feedkeys(":abc def ghi\<S-Left>\<C-W>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"abc ghi', @:)
+    call feedkeys(":abc def\<S-Left>\<Del>\<C-B>\"\<CR>", 'tx')
+    call assert_equal('"abc ef', @:, e)
 
-  call feedkeys(":abc def\<S-Left>\<C-U>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"def', @:)
+    call feedkeys(":abc def\<S-Left>\<BS>\<C-B>\"\<CR>", 'tx')
+    call assert_equal('"abcdef', @:)
+
+    call feedkeys(":abc def ghi\<S-Left>\<C-W>\<C-B>\"\<CR>", 'tx')
+    call assert_equal('"abc ghi', @:, e)
+
+    call feedkeys(":abc def\<S-Left>\<C-U>\<C-B>\"\<CR>", 'tx')
+    call assert_equal('"def', @:, e)
+  endfor
+
+  let &encoding = encoding_save
+endfunc
+
+func Test_cmdline_keymap_ctrl_hat()
+  if !has('keymap')
+    return
+  endif
+
+  set keymap=esperanto
+  call feedkeys(":\"Jxauxdo \<C-^>Jxauxdo \<C-^>Jxauxdo\<CR>", 'tx')
+  call assert_equal('"Jxauxdo Ĵaŭdo Jxauxdo', @:)
+  set keymap=
 endfunc
 
 func Test_illegal_address1()
@@ -741,20 +760,20 @@
 
     " 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', @:)
+    call assert_equal('"0ab1cd4', @:, e)
 
     " Test overstrike going beyond end of command line.
     call feedkeys(":\"01234\<home>\<right>\<right>ab\<right>\<insert>cdefgh\<enter>", 'xt')
-    call assert_equal('"0ab1cdefgh', @:)
+    call assert_equal('"0ab1cdefgh', @:, e)
 
     " 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', @:)
+    call assert_equal('"ab0cd3ef4', @:, e)
   endfor
 
   " 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', @:)
+  call assert_equal('"テabキcdエディタ', @:, e)
 
   let &encoding = encoding_save
 endfunc