You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: fee.rs
    path of file: ./repos/solana/sdk/src
    
    the code of the file until where you have to start completion: //! Fee structures.

use crate::native_token::sol_to_lamports;
#[cfg(not(target_os = "solana"))]
use solana_program::message::SanitizedMessage;

/// A fee and its associ
    
    fn test_total_fee_rounding() {
        // round large `f64` can lost precision, see feature gate:
        // "Removing unwanted rounding in fee calculation #34982"

        let large_fee_details = FeeDetails {
            transaction_fee: u64::MAX - 11,
            prioritization_fee: 1,
        };
        let expected_large_fee = u64::MAX - 10;

        assert_eq!(large_fee_details.total_fee(true), expected_large_fee);
        assert_ne!(large_fee_details.total_fee(false), expected_large_fee);
    }