work on level generator

src/level.rs

@@ -57,6 +57,7 @@ impl Level {
             return (None, None, None);
         }
         if !self.discovered[x][y] {
+            #[cfg(test)]
             return (Some(StructureElement::Unknown), None, None);
         }
         let search_pos = &Position::new(self.level, x, y);