tests: A SANITY test prereq for testing if we're root

diff --git a/t/README b/t/README
index dc07939375c416d73c503cf1134d0706107e5ad6..28effb44372a5115bd138ac37b18efd4906b5bb4 100644 (file)
--- a/t/README
+++ b/t/README
@@ -523,6 +523,11 @@ use these, and "test_set_prereq" for how to define your own.
    The filesystem we're on supports symbolic links. E.g. a FAT
    filesystem doesn't support these. See 704a3143 for details.
 
+ - SANITY
+
+   Test is not run by root user, and an attempt to write to an
+   unwritable file is expected to fail correctly.
+
 Tips for Writing Tests
 ----------------------