test: add sus test

src/builtins/sus.rs

@@ -29,3 +29,13 @@ impl Builtin for Sus {
         Ok(())
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_quote() {
+        assert_eq!(Sus.execute(&mut BuiltinConfig::new(), vec![]), Ok(()))
+    }
+}