Merge pull request #14785 from janlazo/vim-8.1.1838

vim-patch:8.1.{1838,1865},8.2.{38,39,46,945,948,2896}

3 files changed, 453 insertions, 160 deletions

diff --git a/src/nvim/testdir/test_normal.vim b/src/nvim/testdir/test_normal.vim
index 4a00999c45..5c413d1e16 100644
--- a/src/nvim/testdir/test_normal.vim
+++ b/src/nvim/testdir/test_normal.vim
@@ -1111,161 +1111,6 @@ func Test_normal18_z_fold()
   bw!
 endfunc
 
-func Test_normal19_z_spell()
-  if !has("spell") || !has('syntax')
-    return
-  endif
-  new
-  call append(0, ['1 good', '2 goood', '3 goood'])
-  set spell spellfile=./Xspellfile.add spelllang=en
-  let oldlang=v:lang
-  lang C
-
-  " Test for zg
-  1
-  norm! ]s
-  call assert_equal('2 goood', getline('.'))
-  norm! zg
-  1
-  let a=execute('unsilent :norm! ]s')
-  call assert_equal('1 good', getline('.'))
-  call assert_equal('search hit BOTTOM, continuing at TOP', a[1:])
-  let cnt=readfile('./Xspellfile.add')
-  call assert_equal('goood', cnt[0])
-
-  " Test for zw
-  2
-  norm! $zw
-  1
-  norm! ]s
-  call assert_equal('2 goood', getline('.'))
-  let cnt=readfile('./Xspellfile.add')
-  call assert_equal('#oood', cnt[0])
-  call assert_equal('goood/!', cnt[1])
-
-  " Test for zg in visual mode
-  let a=execute('unsilent :norm! V$zg')
-  call assert_equal("Word '2 goood' added to ./Xspellfile.add", a[1:])
-  1
-  norm! ]s
-  call assert_equal('3 goood', getline('.'))
-  let cnt=readfile('./Xspellfile.add')
-  call assert_equal('2 goood', cnt[2])
-  " Remove "2 good" from spellfile
-  2
-  let a=execute('unsilent norm! V$zw')
-  call assert_equal("Word '2 goood' added to ./Xspellfile.add", a[1:])
-  let cnt=readfile('./Xspellfile.add')
-  call assert_equal('2 goood/!', cnt[3])
-
-  " Test for zG
-  let a=execute('unsilent norm! V$zG')
-  call assert_match("Word '2 goood' added to .*", a)
-  let fname=matchstr(a, 'to\s\+\zs\f\+$')
-  let fname=Fix_truncated_tmpfile(fname)
-  let cnt=readfile(fname)
-  call assert_equal('2 goood', cnt[0])
-
-  " Test for zW
-  let a=execute('unsilent norm! V$zW')
-  call assert_match("Word '2 goood' added to .*", a)
-  let cnt=readfile(fname)
-  call assert_equal('# goood', cnt[0])
-  call assert_equal('2 goood/!', cnt[1])
-
-  " Test for zuW
-  let a=execute('unsilent norm! V$zuW')
-  call assert_match("Word '2 goood' removed from .*", a)
-  let cnt=readfile(fname)
-  call assert_equal('# goood', cnt[0])
-  call assert_equal('# goood/!', cnt[1])
-
-  " Test for zuG
-  let a=execute('unsilent norm! $zG')
-  call assert_match("Word 'goood' added to .*", a)
-  let cnt=readfile(fname)
-  call assert_equal('# goood', cnt[0])
-  call assert_equal('# goood/!', cnt[1])
-  call assert_equal('goood', cnt[2])
-  let a=execute('unsilent norm! $zuG')
-  let cnt=readfile(fname)
-  call assert_match("Word 'goood' removed from .*", a)
-  call assert_equal('# goood', cnt[0])
-  call assert_equal('# goood/!', cnt[1])
-  call assert_equal('#oood', cnt[2])
-  " word not found in wordlist
-  let a=execute('unsilent norm! V$zuG')
-  let cnt=readfile(fname)
-  call assert_match("", a)
-  call assert_equal('# goood', cnt[0])
-  call assert_equal('# goood/!', cnt[1])
-  call assert_equal('#oood', cnt[2])
-
-  " Test for zug
-  call delete('./Xspellfile.add')
-  2
-  let a=execute('unsilent norm! $zg')
-  let cnt=readfile('./Xspellfile.add')
-  call assert_equal('goood', cnt[0])
-  let a=execute('unsilent norm! $zug')
-  call assert_match("Word 'goood' removed from \./Xspellfile.add", a)
-  let cnt=readfile('./Xspellfile.add')
-  call assert_equal('#oood', cnt[0])
-  " word not in wordlist
-  let a=execute('unsilent norm! V$zug')
-  call assert_match('', a)
-  let cnt=readfile('./Xspellfile.add')
-  call assert_equal('#oood', cnt[0])
-
-  " Test for zuw
-  call delete('./Xspellfile.add')
-  2
-  let a=execute('unsilent norm! Vzw')
-  let cnt=readfile('./Xspellfile.add')
-  call assert_equal('2 goood/!', cnt[0])
-  let a=execute('unsilent norm! Vzuw')
-  call assert_match("Word '2 goood' removed from \./Xspellfile.add", a)
-  let cnt=readfile('./Xspellfile.add')
-  call assert_equal('# goood/!', cnt[0])
-  " word not in wordlist
-  let a=execute('unsilent norm! $zug')
-  call assert_match('', a)
-  let cnt=readfile('./Xspellfile.add')
-  call assert_equal('# goood/!', cnt[0])
-
-  " add second entry to spellfile setting
-  set spellfile=./Xspellfile.add,./Xspellfile2.add
-  call delete('./Xspellfile.add')
-  2
-  let a=execute('unsilent norm! $2zg')
-  let cnt=readfile('./Xspellfile2.add')
-  call assert_match("Word 'goood' added to ./Xspellfile2.add", a)
-  call assert_equal('goood', cnt[0])
-
-  " Test for :spellgood!
-  let temp = execute(':spe!0/0')
-  call assert_match('Invalid region', temp)
-  let spellfile = matchstr(temp, 'Invalid region nr in \zs.*\ze line \d: 0')
-  call assert_equal(['# goood', '# goood/!', '#oood', '0/0'], readfile(spellfile))
-  call delete(spellfile)
-
-  " clean up
-  exe "lang" oldlang
-  call delete("./Xspellfile.add")
-  call delete("./Xspellfile2.add")
-  call delete("./Xspellfile.add.spl")
-  call delete("./Xspellfile2.add.spl")
-
-  " zux -> no-op
-  2
-  norm! $zux
-  call assert_equal([], glob('Xspellfile.add',0,1))
-  call assert_equal([], glob('Xspellfile2.add',0,1))
-
-  set spellfile=
-  bw!
-endfunc
-
 func Test_normal20_exmode()
   if !has("unix")
     " Reading from redirected file doesn't work on MS-Windows
diff --git a/src/nvim/testdir/test_spell.vim b/src/nvim/testdir/test_spell.vim
index ab8a998bb8..e525d06ea2 100644
--- a/src/nvim/testdir/test_spell.vim
+++ b/src/nvim/testdir/test_spell.vim
@@ -106,11 +106,14 @@ foobar/?
    set spelllang=Xwords.spl
    call assert_equal(['foobar', 'rare'], spellbadword('foo foobar'))
 
-  " Typo should not be detected without the 'spell' option.
+  " Typo should be detected even without the 'spell' option.
   set spelllang=en_gb nospell
   call assert_equal(['', ''], spellbadword('centre'))
-  call assert_equal(['', ''], spellbadword('My bycycle.'))
-  call assert_equal(['', ''], spellbadword('A sentence. another sentence'))
+  call assert_equal(['bycycle', 'bad'], spellbadword('My bycycle.'))
+  call assert_equal(['another', 'caps'], spellbadword('A sentence. another sentence'))
+
+  set spelllang=
+  call assert_fails("call spellbadword('maxch')", 'E756:')
 
   call delete('Xwords.spl')
   call delete('Xwords')
@@ -172,6 +175,183 @@ func Test_spellreall()
   bwipe!
 endfunc
 
+" Test spellsuggest({word} [, {max} [, {capital}]])
+func Test_spellsuggest()
+  " Verify suggestions are given even when spell checking is not enabled.
+  set nospell
+  call assert_equal(['march', 'March'], spellsuggest('marrch', 2))
+
+  set spell
+
+  " With 1 argument.
+  call assert_equal(['march', 'March'], spellsuggest('marrch')[0:1])
+
+  " With 2 arguments.
+  call assert_equal(['march', 'March'], spellsuggest('marrch', 2))
+
+  " With 3 arguments.
+  call assert_equal(['march'], spellsuggest('marrch', 1, 0))
+  call assert_equal(['March'], spellsuggest('marrch', 1, 1))
+
+  " Test with digits and hyphen.
+  call assert_equal('Carbon-14', spellsuggest('Carbon-15')[0])
+
+  " Comment taken from spellsuggest.c explains the following test cases:
+  "
+  " If there are more UPPER than lower case letters suggest an
+  " ALLCAP word.  Otherwise, if the first letter is UPPER then
+  " suggest ONECAP.  Exception: "ALl" most likely should be "All",
+  " require three upper case letters.
+  call assert_equal(['THIRD', 'third'], spellsuggest('thIRD', 2))
+  call assert_equal(['third', 'THIRD'], spellsuggest('tHIrd', 2))
+  call assert_equal(['Third'], spellsuggest('THird', 1))
+  call assert_equal(['All'],      spellsuggest('ALl', 1))
+
+  call assert_fails("call spellsuggest('maxch', [])", 'E745:')
+  call assert_fails("call spellsuggest('maxch', 2, [])", 'E745:')
+
+  set spelllang=
+  call assert_fails("call spellsuggest('maxch')", 'E756:')
+  set spelllang&
+
+  set spell&
+endfunc
+
+" Test 'spellsuggest' option with methods fast, best and double.
+func Test_spellsuggest_option_methods()
+  set spell
+
+  for e in ['utf-8']
+    exe 'set encoding=' .. e
+
+    set spellsuggest=fast
+    call assert_equal(['Stick', 'Stitch'], spellsuggest('Stich', 2), e)
+
+    " With best or double option, "Stitch" should become the top suggestion
+    " because of better phonetic matching.
+    set spellsuggest=best
+    call assert_equal(['Stitch', 'Stick'], spellsuggest('Stich', 2), e)
+
+    set spellsuggest=double
+    call assert_equal(['Stitch', 'Stick'], spellsuggest('Stich', 2), e)
+  endfor
+
+  set spell& spellsuggest& encoding&
+endfunc
+
+" Test 'spellsuggest' option with value file:{filename}
+func Test_spellsuggest_option_file()
+  set spell spellsuggest=file:Xspellsuggest
+  call writefile(['emacs/vim',
+        \         'theribal/terrible',
+        \         'teribal/terrrible',
+        \         'terribal'],
+        \         'Xspellsuggest')
+
+  call assert_equal(['vim'],      spellsuggest('emacs', 2))
+  call assert_equal(['terrible'], spellsuggest('theribal',2))
+
+  " If the suggestion is misspelled (*terrrible* with 3 r),
+  " it should not be proposed.
+  " The entry for "terribal" should be ignored because of missing slash.
+  call assert_equal([], spellsuggest('teribal', 2))
+  call assert_equal([], spellsuggest('terribal', 2))
+
+  set spell spellsuggest=best,file:Xspellsuggest
+  call assert_equal(['vim', 'Emacs'],       spellsuggest('emacs', 2))
+  call assert_equal(['terrible', 'tribal'], spellsuggest('theribal', 2))
+  call assert_equal(['tribal'],             spellsuggest('teribal', 1))
+  call assert_equal(['tribal'],             spellsuggest('terribal', 1))
+
+  call delete('Xspellsuggest')
+  call assert_fails("call spellsuggest('vim')", "E484: Can't open file Xspellsuggest")
+
+  set spellsuggest& spell&
+endfunc
+
+" Test 'spellsuggest' option with value {number}
+" to limit the number of suggestions
+func Test_spellsuggest_option_number()
+  set spell spellsuggest=2,best
+  new
+
+  " We limited the number of suggestions to 2, so selecting
+  " the 1st and 2nd suggestion should correct the word, but
+  " selecting a 3rd suggestion should do nothing.
+  call setline(1, 'A baord')
+  norm $1z=
+  call assert_equal('A board', getline(1))
+
+  call setline(1, 'A baord')
+  norm $2z=
+  call assert_equal('A bard', getline(1))
+
+  call setline(1, 'A baord')
+  norm $3z=
+  call assert_equal('A baord', getline(1))
+
+  let a = execute('norm $z=')
+  call assert_equal(
+  \    "\n"
+  \ .. "Change \"baord\" to:\n"
+  \ .. " 1 \"board\"\n"
+  \ .. " 2 \"bard\"\n"
+  \ .. "Type number and <Enter> or click with the mouse (q or empty cancels): ", a)
+
+  set spell spellsuggest=0
+  call assert_equal("\nSorry, no suggestions", execute('norm $z='))
+
+  " Unlike z=, function spellsuggest(...) should not be affected by the
+  " max number of suggestions (2) set by the 'spellsuggest' option.
+  call assert_equal(['board', 'bard', 'broad'], spellsuggest('baord', 3))
+
+  set spellsuggest& spell&
+  bwipe!
+endfunc
+
+" Test 'spellsuggest' option with value expr:{expr}
+func Test_spellsuggest_option_expr()
+  " A silly 'spellsuggest' function which makes suggestions all uppercase
+  " and makes the score of each suggestion the length of the suggested word.
+  " So shorter suggestions are preferred.
+  func MySuggest()
+    let spellsuggest_save = &spellsuggest
+    set spellsuggest=3,best
+    let result = map(spellsuggest(v:val, 3), "[toupper(v:val), len(v:val)]")
+    let &spellsuggest = spellsuggest_save
+    return result
+  endfunc
+
+  set spell spellsuggest=expr:MySuggest()
+  call assert_equal(['BARD', 'BOARD', 'BROAD'], spellsuggest('baord', 3))
+
+  new
+  call setline(1, 'baord')
+  let a = execute('norm z=')
+  call assert_equal(
+  \    "\n"
+  \ .. "Change \"baord\" to:\n"
+  \ .. " 1 \"BARD\"\n"
+  \ .. " 2 \"BOARD\"\n"
+  \ .. " 3 \"BROAD\"\n"
+  \ .. "Type number and <Enter> or click with the mouse (q or empty cancels): ", a)
+
+  " With verbose, z= should show the score i.e. word length with
+  " our SpellSuggest() function.
+  set verbose=1
+  let a = execute('norm z=')
+  call assert_equal(
+  \    "\n"
+  \ .. "Change \"baord\" to:\n"
+  \ .. " 1 \"BARD\"                      (4 - 0)\n"
+  \ .. " 2 \"BOARD\"                     (5 - 0)\n"
+  \ .. " 3 \"BROAD\"                     (5 - 0)\n"
+  \ .. "Type number and <Enter> or click with the mouse (q or empty cancels): ", a)
+
+  set spell& spellsuggest& verbose&
+  bwipe!
+endfunc
+
 func Test_spellinfo()
   throw 'skipped: Nvim does not support enc=latin1'
   new
@@ -227,7 +407,7 @@ func Test_zz_basic()
         \ )
 
   call assert_equal("gebletegek", soundfold('goobledygoook'))
-  call assert_equal("kepereneven", soundfold('kóopërÿnôven'))
+  call assert_equal("kepereneven", soundfold('kóopërÿnôven'))
   call assert_equal("everles gesvets etele", soundfold('oeverloos gezwets edale'))
 endfunc
 
@@ -408,7 +588,7 @@ func Test_zz_sal_and_addition()
   mkspell! Xtest Xtest
   set spl=Xtest.latin1.spl spell
   call assert_equal('kbltykk', soundfold('goobledygoook'))
-  call assert_equal('kprnfn', soundfold('kóopërÿnôven'))
+  call assert_equal('kprnfn', soundfold('kóopërÿnôven'))
   call assert_equal('*fls kswts tl', soundfold('oeverloos gezwets edale'))
 
   "also use an addition file
@@ -461,6 +641,34 @@ func Test_zeq_crash()
   bwipe!
 endfunc
 
+" Check that z= works even when 'nospell' is set.  This test uses one of the
+" tests in Test_spellsuggest_option_number() just to verify that z= basically
+" works and that "E756: Spell checking is not enabled" is not generated.
+func Test_zeq_nospell()
+  new
+  set nospell spellsuggest=1,best
+  call setline(1, 'A baord')
+  try
+    norm $1z=
+    call assert_equal('A board', getline(1))
+  catch
+    call assert_report("Caught exception: " . v:exception)
+  endtry
+  set spell& spellsuggest&
+  bwipe!
+endfunc
+
+" Check that "E756: Spell checking is not possible" is reported when z= is
+" executed and 'spelllang' is empty.
+func Test_zeq_no_spelllang()
+  new
+  set spelllang= spellsuggest=1,best
+  call setline(1, 'A baord')
+  call assert_fails('normal $1z=', 'E756:')
+  set spelllang& spellsuggest&
+  bwipe!
+endfunc
+
 " Check handling a word longer than MAXWLEN.
 func Test_spell_long_word()
   set enc=utf-8
diff --git a/src/nvim/testdir/test_spellfile.vim b/src/nvim/testdir/test_spellfile.vim
new file mode 100644
index 0000000000..729467b556
--- /dev/null
+++ b/src/nvim/testdir/test_spellfile.vim
@@ -0,0 +1,240 @@
+" Test for commands that operate on the spellfile.
+
+source shared.vim
+source check.vim
+
+CheckFeature spell
+CheckFeature syntax
+
+func Test_spell_normal()
+  new
+  call append(0, ['1 good', '2 goood', '3 goood'])
+  set spell spellfile=./Xspellfile.add spelllang=en
+  let oldlang=v:lang
+  lang C
+
+  " Test for zg
+  1
+  norm! ]s
+  call assert_equal('2 goood', getline('.'))
+  norm! zg
+  1
+  let a=execute('unsilent :norm! ]s')
+  call assert_equal('1 good', getline('.'))
+  call assert_equal('search hit BOTTOM, continuing at TOP', a[1:])
+  let cnt=readfile('./Xspellfile.add')
+  call assert_equal('goood', cnt[0])
+
+  " Test for zw
+  2
+  norm! $zw
+  1
+  norm! ]s
+  call assert_equal('2 goood', getline('.'))
+  let cnt=readfile('./Xspellfile.add')
+  call assert_equal('#oood', cnt[0])
+  call assert_equal('goood/!', cnt[1])
+
+  " Test for :spellrare
+  spellrare rare
+  let cnt=readfile('./Xspellfile.add')
+  call assert_equal(['#oood', 'goood/!', 'rare/?'], cnt)
+
+  " Make sure :spellundo works for rare words.
+  spellundo rare
+  let cnt=readfile('./Xspellfile.add')
+  call assert_equal(['#oood', 'goood/!', '#are/?'], cnt)
+
+  " Test for zg in visual mode
+  let a=execute('unsilent :norm! V$zg')
+  call assert_equal("Word '2 goood' added to ./Xspellfile.add", a[1:])
+  1
+  norm! ]s
+  call assert_equal('3 goood', getline('.'))
+  let cnt=readfile('./Xspellfile.add')
+  call assert_equal('2 goood', cnt[3])
+  " Remove "2 good" from spellfile
+  2
+  let a=execute('unsilent norm! V$zw')
+  call assert_equal("Word '2 goood' added to ./Xspellfile.add", a[1:])
+  let cnt=readfile('./Xspellfile.add')
+  call assert_equal('2 goood/!', cnt[4])
+
+  " Test for zG
+  let a=execute('unsilent norm! V$zG')
+  call assert_match("Word '2 goood' added to .*", a)
+  let fname=matchstr(a, 'to\s\+\zs\f\+$')
+  let cnt=readfile(fname)
+  call assert_equal('2 goood', cnt[0])
+
+  " Test for zW
+  let a=execute('unsilent norm! V$zW')
+  call assert_match("Word '2 goood' added to .*", a)
+  let cnt=readfile(fname)
+  call assert_equal('# goood', cnt[0])
+  call assert_equal('2 goood/!', cnt[1])
+
+  " Test for zuW
+  let a=execute('unsilent norm! V$zuW')
+  call assert_match("Word '2 goood' removed from .*", a)
+  let cnt=readfile(fname)
+  call assert_equal('# goood', cnt[0])
+  call assert_equal('# goood/!', cnt[1])
+
+  " Test for zuG
+  let a=execute('unsilent norm! $zG')
+  call assert_match("Word 'goood' added to .*", a)
+  let cnt=readfile(fname)
+  call assert_equal('# goood', cnt[0])
+  call assert_equal('# goood/!', cnt[1])
+  call assert_equal('goood', cnt[2])
+  let a=execute('unsilent norm! $zuG')
+  let cnt=readfile(fname)
+  call assert_match("Word 'goood' removed from .*", a)
+  call assert_equal('# goood', cnt[0])
+  call assert_equal('# goood/!', cnt[1])
+  call assert_equal('#oood', cnt[2])
+  " word not found in wordlist
+  let a=execute('unsilent norm! V$zuG')
+  let cnt=readfile(fname)
+  call assert_match("", a)
+  call assert_equal('# goood', cnt[0])
+  call assert_equal('# goood/!', cnt[1])
+  call assert_equal('#oood', cnt[2])
+
+  " Test for zug
+  call delete('./Xspellfile.add')
+  2
+  let a=execute('unsilent norm! $zg')
+  let cnt=readfile('./Xspellfile.add')
+  call assert_equal('goood', cnt[0])
+  let a=execute('unsilent norm! $zug')
+  call assert_match("Word 'goood' removed from \./Xspellfile.add", a)
+  let cnt=readfile('./Xspellfile.add')
+  call assert_equal('#oood', cnt[0])
+  " word not in wordlist
+  let a=execute('unsilent norm! V$zug')
+  call assert_match('', a)
+  let cnt=readfile('./Xspellfile.add')
+  call assert_equal('#oood', cnt[0])
+
+  " Test for zuw
+  call delete('./Xspellfile.add')
+  2
+  let a=execute('unsilent norm! Vzw')
+  let cnt=readfile('./Xspellfile.add')
+  call assert_equal('2 goood/!', cnt[0])
+  let a=execute('unsilent norm! Vzuw')
+  call assert_match("Word '2 goood' removed from \./Xspellfile.add", a)
+  let cnt=readfile('./Xspellfile.add')
+  call assert_equal('# goood/!', cnt[0])
+  " word not in wordlist
+  let a=execute('unsilent norm! $zug')
+  call assert_match('', a)
+  let cnt=readfile('./Xspellfile.add')
+  call assert_equal('# goood/!', cnt[0])
+
+  " add second entry to spellfile setting
+  set spellfile=./Xspellfile.add,./Xspellfile2.add
+  call delete('./Xspellfile.add')
+  2
+  let a=execute('unsilent norm! $2zg')
+  let cnt=readfile('./Xspellfile2.add')
+  call assert_match("Word 'goood' added to ./Xspellfile2.add", a)
+  call assert_equal('goood', cnt[0])
+
+  " Test for :spellgood!
+  let temp = execute(':spe!0/0')
+  call assert_match('Invalid region', temp)
+  let spellfile = matchstr(temp, 'Invalid region nr in \zs.*\ze line \d: 0')
+  call assert_equal(['# goood', '# goood/!', '#oood', '0/0'], readfile(spellfile))
+
+  " Test for :spellrare!
+  :spellrare! raare
+  call assert_equal(['# goood', '# goood/!', '#oood', '0/0', 'raare/?'], readfile(spellfile))
+  call delete(spellfile)
+
+  " clean up
+  exe "lang" oldlang
+  call delete("./Xspellfile.add")
+  call delete("./Xspellfile2.add")
+  call delete("./Xspellfile.add.spl")
+  call delete("./Xspellfile2.add.spl")
+
+  " zux -> no-op
+  2
+  norm! $zux
+  call assert_equal([], glob('Xspellfile.add',0,1))
+  call assert_equal([], glob('Xspellfile2.add',0,1))
+
+  set spellfile=
+  bw!
+endfunc
+
+" Test CHECKCOMPOUNDPATTERN (see :help spell-CHECKCOMPOUNDPATTERN)
+func Test_spellfile_CHECKCOMPOUNDPATTERN()
+  call writefile(['4',
+        \         'one/c',
+        \         'two/c',
+        \         'three/c',
+        \         'four'], 'XtestCHECKCOMPOUNDPATTERN.dic')
+  " Forbid compound words where first word ends with 'wo' and second starts with 'on'.
+  call writefile(['CHECKCOMPOUNDPATTERN 1',
+        \         'CHECKCOMPOUNDPATTERN wo on',
+        \         'COMPOUNDFLAG c'], 'XtestCHECKCOMPOUNDPATTERN.aff')
+
+  let output = execute('mkspell! XtestCHECKCOMPOUNDPATTERN-utf8.spl XtestCHECKCOMPOUNDPATTERN')
+  set spell spelllang=XtestCHECKCOMPOUNDPATTERN-utf8.spl
+
+  " Check valid words with and without valid compounds.
+  for goodword in ['one', 'two', 'three', 'four',
+        \          'oneone', 'onetwo',  'onethree',
+        \          'twotwo', 'twothree',
+        \          'threeone', 'threetwo', 'threethree',
+        \          'onetwothree', 'onethreetwo', 'twothreeone', 'oneoneone']
+    call assert_equal(['', ''], spellbadword(goodword), goodword)
+  endfor
+
+  " Compounds 'twoone' or 'threetwoone' should be forbidden by CHECKCOMPOUNPATTERN.
+  " 'four' does not have the 'c' flag in *.aff file so no compound.
+  " 'five' is not in the *.dic file.
+  for badword in ['five', 'onetwox',
+        \         'twoone', 'threetwoone',
+        \         'fourone', 'onefour']
+    call assert_equal([badword, 'bad'], spellbadword(badword))
+  endfor
+
+  set spell& spelllang&
+  call delete('XtestCHECKCOMPOUNDPATTERN.dic')
+  call delete('XtestCHECKCOMPOUNDPATTERN.aff')
+  call delete('XtestCHECKCOMPOUNDPATTERN-utf8.spl')
+endfunc
+
+" Test COMMON (better suggestions with common words, see :help spell-COMMON)
+func Test_spellfile_COMMON()
+  call writefile(['7',
+        \         'and',
+        \         'ant',
+        \         'end',
+        \         'any',
+        \         'tee',
+        \         'the',
+        \         'ted'], 'XtestCOMMON.dic')
+  call writefile(['COMMON the and'], 'XtestCOMMON.aff')
+
+  let output = execute('mkspell! XtestCOMMON-utf8.spl XtestCOMMON')
+  set spell spelllang=XtestCOMMON-utf8.spl
+
+  " COMMON words 'and' and 'the' should be the top suggestions.
+  call assert_equal(['and', 'ant'], spellsuggest('anr', 2))
+  call assert_equal(['and', 'end'], spellsuggest('ond', 2))
+  call assert_equal(['the', 'ted'], spellsuggest('tha', 2))
+  call assert_equal(['the', 'tee'], spellsuggest('dhe', 2))
+
+  set spell& spelllang&
+  call delete('XtestCOMMON.dic')
+  call delete('XtestCOMMON.aff')
+  call delete('XtestCOMMON-utf8.spl')
+endfunc
+
+" vim: shiftwidth=2 sts=2 expandtab