Add tests for into_inner

reactive_graph/tests/signal.rs

@@ -2,7 +2,7 @@ use reactive_graph::{
     owner::Owner,
     signal::{arc_signal, signal, ArcRwSignal, RwSignal},
     traits::{
-        Get, GetUntracked, Read, Set, Update, UpdateUntracked, With,
+        Get, GetUntracked, IntoInner, Read, Set, Update, UpdateUntracked, With,
         WithUntracked, Write,
     },
 };
@@ -108,3 +108,24 @@ fn update_signal() {
     set_a.set(4);
     assert_eq!(a.get(), 4);
 }
+
+#[test]
+fn into_inner_signal() {
+    let owner = Owner::new();
+    owner.set();
+
+    let rw_signal = RwSignal::new(1);
+    assert_eq!(rw_signal.get(), 1);
+    assert_eq!(rw_signal.into_inner(), Some(1));
+}
+
+#[test]
+fn into_inner_arc_signal() {
+    let owner = Owner::new();
+    owner.set();
+
+    let (a, b) = arc_signal(2);
+    assert_eq!(a.get(), 2);
+    std::mem::drop(b);
+    assert_eq!(a.into_inner(), Some(2));
+}