create tests for signals

packages/signals/src/rt.rs

@@ -41,7 +41,7 @@ fn owner_in_scope(scope: ScopeId) -> Rc<Owner> {
 }
 
 pub struct CopyValue<T: 'static> {
-    pub value: CopyHandle<T>,
+    pub(crate) value: CopyHandle<T>,
     origin_scope: ScopeId,
 }