read assets test split into two possible situations

Author: Aurashk

src/input/asset.rs

@@ -105,7 +105,10 @@ mod tests {
     }
 
     #[rstest]
+    #[case::max_decommission_year_provided(Some(2015))]
+    #[case::max_decommission_year_not_provided(None)]
     fn test_read_assets_from_iter_valid(
+        #[case] max_decommission_year: Option<u32>,
         agent_ids: IndexSet<AgentID>,
         processes: ProcessMap,
         region_ids: IndexSet<RegionID>,
@@ -116,14 +119,15 @@ mod tests {
             region_id: "GBR".into(),
             capacity: Capacity(1.0),
             commission_year: 2010,
-            max_decommission_year: None,
+            max_decommission_year: max_decommission_year,
         };
-        let asset_out = Asset::new_future(
+        let asset_out = Asset::new_future_with_max_decommission(
             "agent1".into(),
             Rc::clone(processes.values().next().unwrap()),
             "GBR".into(),
             Capacity(1.0),
             2010,
+            max_decommission_year,
         )
         .unwrap();
         assert_equal(