From b9d108e590bfef984666173256f54b76f0a4cc7b Mon Sep 17 00:00:00 2001
From: Vedat Can Keklik <vcankeklik@gmail.com>
Date: Fri, 29 Dec 2023 15:34:14 +0300
Subject: [PATCH] fix: Env test case

---
 server/src/runtime/environment.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/server/src/runtime/environment.rs b/server/src/runtime/environment.rs
index bdbba58f..e477bded 100644
--- a/server/src/runtime/environment.rs
+++ b/server/src/runtime/environment.rs
@@ -125,6 +125,21 @@ mod test {
         assert_eq!(child.borrow().read("five").unwrap(), RV::Num(5.0));
     }
 
+    #[test]
+    fn test_write_to_parent() {
+        let parent = super::Environment::new(None);
+        parent
+            .borrow_mut()
+            .declare("five".to_string(), RV::Num(5.0));
+        let child = super::Environment::new(Some(parent.clone()));
+        child
+            .borrow_mut()
+            .assign("five".to_string(), RV::Num(5.1))
+            .unwrap();
+        assert_eq!(parent.borrow().read("five").unwrap(), RV::Num(5.1));
+        assert_eq!(child.borrow().read("five").unwrap(), RV::Num(5.1));
+    }
+
     #[test]
     fn test_read_undefined_variable() {
         let env = super::Environment::new(None);