Replace most panics in the core library with results

tests/common/library_loader.rs

@@ -121,7 +121,9 @@ pub fn load_types(path: &String) -> Box<dyn TypeLibrary> {
 
         for (i, v) in record.iter().skip(1).enumerate() {
             let effectiveness = v.parse::<f32>().unwrap();
-            type_library.set_effectiveness(offensive_type_id, ((i + 1) as u8).into(), effectiveness);
+            type_library
+                .set_effectiveness(offensive_type_id, ((i + 1) as u8).into(), effectiveness)
+                .unwrap();
         }
     }
     type_library
@@ -463,7 +465,7 @@ fn parse_moves(value: &Value, move_library: &Box<dyn MoveLibrary>) -> Box<dyn Le
         let name = level_move.get("name").unwrap().as_str().unwrap().into();
         let level = level_move.get("level").unwrap().as_u64().unwrap() as LevelInt;
         assert!(move_library.get(&name).is_some());
-        moves.add_level_move(level, &name);
+        moves.add_level_move(level, &name).unwrap();
     }
 
     Box::new(moves)
@@ -500,10 +502,12 @@ fn test_type_library_loaded() {
     let types = load_types(&path.to_str().unwrap().to_string());
 
     assert_eq!(
-        types.get_effectiveness(
-            types.get_type_id(&"fire".into()).unwrap(),
-            &[types.get_type_id(&"grass".into()).unwrap()],
-        ),
+        types
+            .get_effectiveness(
+                types.get_type_id(&"fire".into()).unwrap(),
+                &[types.get_type_id(&"grass".into()).unwrap()],
+            )
+            .unwrap(),
         2.0
     );
 }