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: cleanup_tests.rs
    path of file: ./repos/Tuxedo/wardrobe/timestamp/src
    
    the code of the file until where you have to start completion: //! Unit tests for the Timestamp piece.
//! This module tests the secondary flow of cleaning up old timestamps.

use super::{
    CleanUpTimestamp, SimpleConstraintChecker, Timestamp, TimestampConfig, TimestampError,
};
use tuxedo_core::dynamic_typing::testing::Bogus;
use TimestampError::*;

/// The mock config always says the block number is one million.
pub struct AlwaysBlockMillion;

impl TimestampConfig for AlwaysBlockMillion {
    fn block_
    
fn cleanup_timestamp_multiple_first_valid_second_invalid() {
    let old = Timestamp::new(AlwaysBlockMillion::MINIMUM_TIME_INTERVAL, 1);
    let supposedly_old = Timestamp::new(
        2 * AlwaysBlockMillion::MIN_TIME_BEFORE_CLEANUP,
        2 * AlwaysBlockMillion::MIN_BLOCKS_BEFORE_CLEANUP,
    );
    let newer = Timestamp::new(
        2 * AlwaysBlockMillion::MIN_TIME_BEFORE_CLEANUP,
        2 * AlwaysBlockMillion::MIN_BLOCKS_BEFORE_CLEANUP,
    );

    let inp = vec![old.into(), supposedly_old.into()];
    let peek = vec![newer.into()];

    assert_eq!(
        CleanUpTimestamp::<AlwaysBlockMillion>::default().check(&inp, &peek, &[]),
        Err(DontBeSoHasty)
    );
}