patch 8.2.2623: some tests fail when run as root

Problem:    Some tests fail when run as root.
Solution:   Use CheckNotRoot.

src/testdir/test_edit.vim

@@ -1704,9 +1704,10 @@ func Test_edit_charconvert()
 endfunc
 
 " Test for editing a file without read permission
-" NOTE: if you run tests as root this will fail.  Don't run tests as root!
 func Test_edit_file_no_read_perm()
   CheckUnix
+  CheckNotRoot
+
   call writefile(['one', 'two'], 'Xfile')
   call setfperm('Xfile', '-w-------')
   new

src/testdir/test_excmd.vim

@@ -350,13 +350,6 @@ func Test_redir_cmd()
     call assert_fails('redir > Xdir', 'E17:')
     call delete('Xdir', 'd')
   endif
-  if !has('bsd')
-    " Redirecting to a read-only file
-    call writefile([], 'Xfile')
-    call setfperm('Xfile', 'r--r--r--')
-    call assert_fails('redir! > Xfile', 'E190:')
-    call delete('Xfile')
-  endif
 
   " Test for redirecting to a register
   redir @q> | echon 'clean ' | redir END
@@ -369,6 +362,17 @@ func Test_redir_cmd()
   call assert_equal('blue sky', color)
 endfunc
 
+func Test_redir_cmd_readonly()
+  CheckNotRoot
+  CheckNotBSD
+
+  " Redirecting to a read-only file
+  call writefile([], 'Xfile')
+  call setfperm('Xfile', 'r--r--r--')
+  call assert_fails('redir! > Xfile', 'E190:')
+  call delete('Xfile')
+endfunc
+
 " Test for the :filetype command
 func Test_filetype_cmd()
   call assert_fails('filetype abc', 'E475:')

src/testdir/test_help.vim

@@ -1,5 +1,7 @@
 " Tests for :help
 
+source check.vim
+
 func Test_help_restore_snapshot()
   help
   set buftype=
@@ -88,8 +90,19 @@ func Test_helptag_cmd()
   call assert_equal(["help-tags\ttags\t1"], readfile('Xdir/tags'))
   call delete('Xdir/tags')
 
+  " Duplicate tags in the help file
+  call writefile(['*tag1*', '*tag1*', '*tag2*'], 'Xdir/a/doc/sample.txt')
+  call assert_fails('helptags Xdir', 'E154:')
+
+  call delete('Xdir', 'rf')
+endfunc
+
+func Test_helptag_cmd_readonly()
+  CheckUnix
+  CheckNotRoot
   " The following tests fail on FreeBSD for some reason
-  if has('unix') && !has('bsd')
+  CheckNotBSD
+
   " Read-only tags file
   call mkdir('Xdir/doc', 'p')
   call writefile([''], 'Xdir/doc/tags')
@@ -105,17 +118,12 @@ func Test_helptag_cmd()
   call delete('Xdir/doc/tags')
 
   " No permission to read the help file
-    call setfperm('Xdir/a/doc/sample.txt', '-w-------')
+  call mkdir('Xdir/b/doc', 'p')
-    call assert_fails('helptags Xdir', 'E153:', getfperm('Xdir/a/doc/sample.txt'))
+  call writefile([], 'Xdir/b/doc/sample.txt')
-    call delete('Xdir/a/doc/sample.txt')
+  call setfperm('Xdir/b/doc/sample.txt', '-w-------')
-    call delete('Xdir/tags')
+  call assert_fails('helptags Xdir', 'E153:', getfperm('Xdir/b/doc/sample.txt'))
-  endif
-
-  " Duplicate tags in the help file
-  call writefile(['*tag1*', '*tag1*', '*tag2*'], 'Xdir/a/doc/sample.txt')
-  call assert_fails('helptags Xdir', 'E154:')
-
   call delete('Xdir', 'rf')
 endfunc
 
+
 " vim: shiftwidth=2 sts=2 expandtab

src/testdir/test_writefile.vim

@@ -410,6 +410,9 @@ endfunc
 func Test_write_readonly_dir()
   " On MS-Windows, modifying files in a read-only directory is allowed.
   CheckUnix
+  " Root can do it too.
+  CheckNotRoot
+
   call mkdir('Xdir')
   call writefile(['one'], 'Xdir/Xfile1')
   call setfperm('Xdir', 'r-xr--r--')

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2623,
 /**/
     2622,
 /**/