tests: Migrate legacy test undolevels.

src/nvim/testdir/Makefile

@@ -31,7 +31,7 @@ SCRIPTS := test_eval.out                                               \
            test_command_count.out                                      \
            test_cdo.out                                                \
 
-NEW_TESTS = test_undolevels.res
+NEW_TESTS =
 
 SCRIPTS_GUI := test16.out
 

src/nvim/testdir/test_undolevels.vim

@@ -1,46 +0,0 @@
-" Tests for 'undolevels'
-
-set nocompatible viminfo+=nviminfo
-
-func FillBuffer()
-  for i in range(1,13)
-    put=i
-    " Set 'undolevels' to split undo. 
-    exe "setg ul=" . &g:ul
-  endfor
-endfunc
-
-func Test_global_local_undolevels()
-  new one
-  set undolevels=5
-  call FillBuffer()
-  " will only undo the last 5 changes, end up with 13 - (5 + 1) = 7 lines
-  earlier 10
-  call assert_equal(5, &g:undolevels)
-  call assert_equal(-123456, &l:undolevels)
-  call assert_equal('7', getline('$'))
-
-  new two
-  setlocal undolevels=2
-  call FillBuffer()
-  " will only undo the last 2 changes, end up with 13 - (2 + 1) = 10 lines
-  earlier 10
-  call assert_equal(5, &g:undolevels)
-  call assert_equal(2, &l:undolevels)
-  call assert_equal('10', getline('$'))
-
-  setlocal ul=10
-  call assert_equal(5, &g:undolevels)
-  call assert_equal(10, &l:undolevels)
-
-  " Setting local value in "two" must not change local value in "one"
-  wincmd p
-  call assert_equal(5, &g:undolevels)
-  call assert_equal(-123456, &l:undolevels)
-
-  new three
-  setglobal ul=50
-  call assert_equal(50, &g:undolevels)
-  call assert_equal(-123456, &l:undolevels)
-
-endfunc