1 files changed, 49 insertions, 0 deletions
diff --git a/src/nvim/testdir/test_options.vim b/src/nvim/testdir/test_options.vim
index 07e2481f95..8796af7a20 100644
--- a/src/nvim/testdir/test_options.vim
+++ b/src/nvim/testdir/test_options.vim
@@ -448,6 +448,36 @@ func Test_backupskip()
     endif
   endfor
 
+  " Duplicates from environment variables should be filtered out (option has
+  " P_NODUP).  Run this in a separate instance and write v:errors in a file,
+  " so that we see what happens on startup.
+  let after =<< trim [CODE]
+      let bsklist = split(&backupskip, ',')
+      call assert_equal(uniq(copy(bsklist)), bsklist)
+      call writefile(['errors:'] + v:errors, 'Xtestout')
+      qall
+  [CODE]
+  call writefile(after, 'Xafter')
+  " let cmd = GetVimProg() . ' --not-a-term -S Xafter --cmd "set enc=utf8"'
+  let cmd = GetVimProg() . ' -S Xafter --cmd "set enc=utf8"'
+
+  let saveenv = {}
+  for var in ['TMPDIR', 'TMP', 'TEMP']
+    let saveenv[var] = getenv(var)
+    call setenv(var, '/duplicate/path')
+  endfor
+
+  exe 'silent !' . cmd
+  call assert_equal(['errors:'], readfile('Xtestout'))
+
+  " restore environment variables
+  for var in ['TMPDIR', 'TMP', 'TEMP']
+    call setenv(var, saveenv[var])
+  endfor
+
+  call delete('Xtestout')
+  call delete('Xafter')
+
   " Duplicates should be filtered out (option has P_NODUP)
   let backupskip = &backupskip
   set backupskip=
@@ -599,6 +629,25 @@ func Test_visualbell()
   set belloff=all
 endfunc
 
+" Test for the 'write' option
+func Test_write()
+  new
+  call setline(1, ['L1'])
+  set nowrite
+  call assert_fails('write Xfile', 'E142:')
+  set write
+  close!
+endfunc
+
+" Test for 'buftype' option
+func Test_buftype()
+  new
+  call setline(1, ['L1'])
+  set buftype=nowrite
+  call assert_fails('write', 'E382:')
+  close!
+endfunc
+
 " Test for setting option values using v:false and v:true
 func Test_opt_boolean()
   set number&