vim-patch:8.2.0342: some code in ex_getln.c not covered by tests

Problem:    Some code in ex_getln.c not covered by tests.
Solution:   Add more tests. (Yegappan Lakshmanan, closes vim/vim#5717)
0546d7df13

Nvim doesn't support imsearch=2, commenting out that line is enough.
Test_Ex_append() is not applicable to Vim enhanced Ex mode.
Omit test_iminsert.vim as previous patches to that file are N/A.

src/nvim/testdir/test_cmdline.vim

@@ -1558,6 +1558,7 @@ 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 ..= "\<Left>five\<Right>"
   let str ..= "\<Home>two "
   let str ..= "\<C-Left>one "
@@ -1576,6 +1577,7 @@ 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 ..= "\<Right>five\<Left>"
   let str ..= "\<Home>two "
   let str ..= "\<C-Right>one "
@@ -1603,6 +1605,39 @@ func Test_cmdline_expr()
   call assert_equal("\"e \<C-\>\<C-Y>", @:)
 endfunc
 
+" Test for 'imcmdline' and 'imsearch'
+" This test doesn't actually test the input method functionality.
+func Test_cmdline_inputmethod()
+  new
+  call setline(1, ['', 'abc', ''])
+  set imcmdline
+
+  call feedkeys(":\"abc\<CR>", 'xt')
+  call assert_equal("\"abc", @:)
+  call feedkeys(":\"\<C-^>abc\<C-^>\<CR>", 'xt')
+  call assert_equal("\"abc", @:)
+  call feedkeys("/abc\<CR>", 'xt')
+  call assert_equal([2, 1], [line('.'), col('.')])
+  call feedkeys("/\<C-^>abc\<C-^>\<CR>", 'xt')
+  call assert_equal([2, 1], [line('.'), col('.')])
+
+  " set imsearch=2
+  call cursor(1, 1)
+  call feedkeys("/abc\<CR>", 'xt')
+  call assert_equal([2, 1], [line('.'), col('.')])
+  call cursor(1, 1)
+  call feedkeys("/\<C-^>abc\<C-^>\<CR>", 'xt')
+  call assert_equal([2, 1], [line('.'), col('.')])
+  set imdisable
+  call feedkeys("/\<C-^>abc\<C-^>\<CR>", 'xt')
+  call assert_equal([2, 1], [line('.'), col('.')])
+  set imdisable&
+  set imsearch&
+
+  set imcmdline&
+  %bwipe!
+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:')

src/nvim/testdir/test_ex_mode.vim

@@ -141,6 +141,16 @@ func Test_Ex_escape_enter()
   call assert_equal("a\rb", l)
 endfunc
 
+" Test for :append! command in Ex mode
+func Test_Ex_append()
+  throw 'Skipped: Nvim only supports Vim Ex mode'
+  new
+  call setline(1, "\t   abc")
+  call feedkeys("Qappend!\npqr\nxyz\n.\nvisual\n", 'xt')
+  call assert_equal(["\t   abc", "\t   pqr", "\t   xyz"], getline(1, '$'))
+  close!
+endfunc
+
 func Test_ex_mode_errors()
   " Not allowed to enter ex mode when text is locked
   au InsertCharPre <buffer> normal! gQ<CR>

src/nvim/testdir/test_history.vim

@@ -114,6 +114,7 @@ function Test_Search_history_window()
   bwipe!
 endfunc
 
+" Test for :history command option completion
 function Test_history_completion()
   call feedkeys(":history \<C-A>\<C-B>\"\<CR>", 'tx')
   call assert_equal('"history / : = > ? @ all cmd debug expr input search', @:)
@@ -122,8 +123,9 @@ endfunc
 " Test for increasing the 'history' option value
 func Test_history_size()
   let save_histsz = &history
-  call histdel(':')
   set history=10
+  call histadd(':', 'ls')
+  call histdel(':')
   for i in range(1, 5)
     call histadd(':', 'cmd' .. i)
   endfor
@@ -173,6 +175,13 @@ func Test_history_search()
   call assert_equal(['pat2', 'pat1', ''], g:pat)
   cunmap <F2>
   delfunc SavePat
+
+  " Recall patterns with 'history' set to 0
+  set history=0
+  let @/ = 'abc'
+  let cmd = 'call feedkeys("/\<Up>\<Down>\<S-Up>\<S-Down>\<CR>", "xt")'
+  call assert_fails(cmd, 'E486:')
+  set history&
 endfunc
 
 " Test for making sure the key value is not stored in history