sb-api: label helpers wiring + gym/stat_value + policy constants (WI-2, issue #2)

crates/sb-core/src/data.rs

@@ -59,3 +59,18 @@ pub fn load_enemies() -> Vec<EnemyDef> {
 pub fn load_zones() -> Vec<ZoneDef> {
     serde_json::from_str(ZONES_JSON).expect("failed to parse zones.json")
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn enemies_json_parses() {
+        assert!(!load_enemies().is_empty());
+    }
+
+    #[test]
+    fn zones_json_parses() {
+        assert!(!load_zones().is_empty());
+    }
+}