groups tests: Add groups mutex and print message when tests skipped

Fix groups mutex name

1 files changed, 3 insertions, 0 deletions

diff --git a/test/test.rs b/test/test.rs
index 1b73c4ff..f4942d3d 100644
--- a/test/test.rs
+++ b/test/test.rs
@@ -43,6 +43,9 @@ lazy_static! {
     /// Any test that changes the process's current working directory must grab
     /// this mutex
     pub static ref CWD_MTX: Mutex<()> = Mutex::new(());
+    /// Any test that changes the process's supplementary groups must grab this
+    /// mutex
+    pub static ref GROUPS_MTX: Mutex<()> = Mutex::new(());
     /// Any test that creates child processes must grab this mutex, regardless
     /// of what it does with those children.
     pub static ref FORK_MTX: Mutex<()> = Mutex::new(());