From 1c53ba3d4c7ce8ae64d19ecca0d9db3a79ac87b0 Mon Sep 17 00:00:00 2001
From: Jonas Schievink <jonasschievink@gmail.com>
Date: Sun, 23 Jul 2017 12:50:42 +0200
Subject: [PATCH] Add a test ensuring that userdata is dropped

---
 src/tests.rs | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/src/tests.rs b/src/tests.rs
index a02ac37..cdeb245 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -844,3 +844,30 @@ fn test_expired_userdata() {
         hatch:access()
     "#, None).unwrap();
 }
+
+#[test]
+fn detroys_userdata() {
+    use std::sync::atomic::{Ordering, AtomicBool, ATOMIC_BOOL_INIT};
+
+    static DROPPED: AtomicBool = ATOMIC_BOOL_INIT;
+
+    struct Userdata;
+
+    impl LuaUserDataType for Userdata {}
+
+    impl Drop for Userdata {
+        fn drop(&mut self) {
+            DROPPED.store(true, Ordering::SeqCst);
+        }
+    }
+
+    let lua = Lua::new();
+    {
+        let globals = lua.globals();
+        globals.set("userdata", Userdata).unwrap();
+    }
+
+    assert_eq!(DROPPED.load(Ordering::SeqCst), false);
+    drop(lua);  // should destroy all objects
+    assert_eq!(DROPPED.load(Ordering::SeqCst), true);
+}