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: gossip.rs
    path of file: ./repos/holochain/crates/kitsune_p2p/dht/tests
    
    the code of the file until where you have to start completion: #![cfg(feature = "test_utils")]

use kitsune_p2p_dht::{
    arq::*,
    hash::AgentKey,
    op::*,
    persistence::*,
    region::*,
    spacetime::*,
    test_utils::{
        generate_ideal_coverage, gossip_direct, gossip_direct_at, seeded_rng, OpData, TestNode,
    },
};
use kitsune_p2p_timestamp::Timestamp;
use maplit::hashmap;
use rand::Rng;

/// Test that alice and bob can each gossip a single op to each other, using
/// the PoC gossip_direct implementation
#[test]
fn test_basic() {
    let topo = Topology::unit_zero();
    let gopa = GossipParams::new(1.into(), 0);
    let ts = |t: u32| TimeQuantum::from(t).to_timestamp_bounds(&topo).0;

    let alice_arq = Arq::new(8, (-128i32 as u32).into(), 4.into());
    let bobbo_arq = Arq::new(8, 0u32.into(), 4.into());
    let (m
    
fn gossip_scenario_full_sync() {
    holochain_trace::test_run().ok();
    let topo = Topology::standard_zero();
    let gopa = GossipParams::new(1.into(), 0);

    let mut rng = seeded_rng(None);

    // must be a power of 2.
    let pow = 4;
    let n = 2usize.pow(pow);
    let ops_per_node = 10;

    let strat = ArqStrat {
        min_coverage: n as f64,
        ..ArqStrat::default()
    };

    let expected_num_space_chunks: u32 = 8;
    let expected_num_time_chunks: u32 = 22;

    let max_time = TimeQuantum::from(525600 / 12).to_timestamp_bounds(&topo).0; // 1 year
    assert_eq!(
        TelescopingTimes::new(topo.time_quantum(max_time))
            .segments()
            .len() as u32,
        expected_num_time_chunks
    );

    // these arqs will all be Full coverage
    let arqs = generate_ideal_coverage(&topo, &mut rng, &strat, None, n as u32, 0.0);

    let mut nodes: Vec<_> = arqs
        .iter()
        .map(|a| {
            assert_eq!(a.count(), expected_num_space_chunks);
            TestNode::new_single(topo.clone(), gopa, *a).0
        })
        .collect();

    let num_ops = ops_per_node * n;
    let ops = std::iter::repeat_with(|| {
        OpData::fake(
            Loc::new(rng.gen()),
            Timestamp::from_micros(rng.gen_range(0..max_time.as_micros())),
            rng.gen_range(1..16_000_000),
        )
    })
    .take(num_ops);

    for (i, op) in ops.enumerate() {
        nodes[i % n].integrate_op(op);
    }

    let full_region = RegionCoords {
        space: SpaceSegment::new(31, 0),
        time: TimeSegment::new(31, 0),
    };

    // Assert that each node has the expected number of ops to start with,
    // and print each arq at the same time.
    assert_eq!(
        nodes
            .iter()
            .map(|n| {
                let ops = n.query_op_data(&full_region);
                println!("{}", n.ascii_arqs_and_ops(&topo, 64));
                ops.len()
            })
            .collect::<Vec<_>>(),
        vec![ops_per_node; n]
    );

    // Do a bunch of gossip such that node 0 will be exposed to all ops created
    for p in 0..pow {
        let x: usize = 2usize.pow(p + 1);
        for i in (0..n).step_by(x) {
            let a = i;
            let b = i + x / 2;
            let (n1, n2) = get_two_mut(nodes.as_mut_slice(), a, b);
            let stats = gossip_direct_at(n1, n2, topo.time_quantum(max_time))
                .unwrap()
                .stats;

            // Something is wrong if we're sending tons of regions
            assert_eq!(
                stats.regions_sent,
                expected_num_space_chunks * expected_num_time_chunks
            );
            assert_eq!(
                stats.regions_rcvd,
                expected_num_space_chunks * expected_num_time_chunks
            );
            println!(
                "{:>2} <-> {:<2}  regions sent/rcvd: {}/{}, ops sent/rcvd: {:3}/{:3}, bytes sent/rcvd: {}/{}",
                a, b, stats.regions_sent, stats.regions_rcvd, stats.ops_sent, stats.ops_rcvd, stats.op_data_sent, stats.op_data_rcvd
            );
        }
    }

    for n in nodes.iter() {
        println!("{}", n.ascii_arqs_and_ops(&topo, 64));
    }

    assert_eq!(nodes[0].query_op_data(&full_region).len(), num_ops);
}