fixup! editoast: add on_stop_signal flag on train schedule v2

editoast/editoast_schemas/src/train_schedule/schedule_item.rs

@@ -67,3 +67,24 @@ impl<'de> Deserialize<'de> for ScheduleItem {
         })
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::ScheduleItem;
+
+    use serde_json::from_str;
+    use serde_json::to_string;
+
+    #[test]
+    fn desserialize_schedule_item_error() {
+        let schedule_item = ScheduleItem {
+            at: "a".into(),
+            arrival: None,
+            stop_for: None,
+            on_stop_signal: true,
+            locked: false,
+        };
+        let invalid_str = to_string(&schedule_item).unwrap();
+        assert!(from_str::<ScheduleItem>(&invalid_str).is_err());
+    }
+}