{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"assert_eq!(\"12_001\","}]}
    assert_eq!("12_001", isize_with_underscores(12_001));
    assert_eq!("-1_000", isize_with_underscores(-1_000));
    assert_eq!("-999_999", isize_with_underscores(-999_999));