patch 8.2.0509: various code is not properly tested.
Problem: various code is not properly tested.
Solution: Add more tests. (Yegappan Lakshmanan, closes #5871)
diff --git a/src/testdir/test_viminfo.vim b/src/testdir/test_viminfo.vim
index 78e0f1a..044da0a 100644
--- a/src/testdir/test_viminfo.vim
+++ b/src/testdir/test_viminfo.vim
@@ -760,6 +760,11 @@
call setfperm('Xviminfo', '--x------')
call assert_fails('rviminfo Xviminfo', 'E195:')
call delete('Xviminfo')
+
+ " Try to write the viminfo to a directory
+ call mkdir('Xdir')
+ call assert_fails('wviminfo Xdir', 'E886:')
+ call delete('Xdir', 'rf')
endfunc
" Test for writing to an existing viminfo file merges the file marks