{"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"assert_eq!(\"999_999\","}]}
    assert_eq!("999_999", usize_with_underscores(999_999));
    assert_eq!("12_001", usize_with_underscores(12_001));
    assert_eq!("1_000_000", usize_with_underscores(1_000_000));