logos-blockchain-testing/examples/tests/dynamic_join.rs

use std::time::Duration;

use anyhow::Result;
use async_trait::async_trait;
use testing_framework_core::scenario::{Deployer, DynError, RunContext, ScenarioBuilder, Workload};
use testing_framework_runner_local::LocalDeployer;
use testing_framework_workflows::ScenarioBuilderExt;
use tokio::time::{sleep, timeout};

const START_DELAY: Duration = Duration::from_secs(5);
const READY_TIMEOUT: Duration = Duration::from_secs(60);
const READY_POLL_INTERVAL: Duration = Duration::from_secs(2);

struct JoinNodeWorkload {
    name: String,
}

impl JoinNodeWorkload {
    fn new(name: impl Into<String>) -> Self {
        Self { name: name.into() }
    }
}

#[async_trait]
impl Workload for JoinNodeWorkload {
    fn name(&self) -> &str {
        "dynamic_join"
    }

    async fn start(&self, ctx: &RunContext) -> Result<(), DynError> {
        let handle = ctx
            .node_control()
            .ok_or_else(|| "dynamic join workload requires node control".to_owned())?;

        sleep(START_DELAY).await;

        let node = handle.start_validator(&self.name).await?;
        let client = node.api;

        timeout(READY_TIMEOUT, async {
            loop {
                match client.consensus_info().await {
                    Ok(info) if info.height > 0 => break,
                    Ok(_) | Err(_) => sleep(READY_POLL_INTERVAL).await,
                }
            }
        })
        .await
        .map_err(|_| "dynamic join node did not become ready in time")?;

        sleep(ctx.run_duration()).await;
        Ok(())
    }
}

#[tokio::test]
#[ignore = "run manually with `cargo test -p runner-examples -- --ignored`"]
async fn dynamic_join_reaches_consensus_liveness() -> Result<()> {
    let mut scenario =
        ScenarioBuilder::topology_with(|t| t.network_star().validators(2).executors(0))
            .enable_node_control()
            .with_workload(JoinNodeWorkload::new("joiner"))
            .expect_consensus_liveness()
            .with_run_duration(Duration::from_secs(60))
            .build()?;

    let deployer = LocalDeployer::default();
    let runner = deployer.deploy(&scenario).await?;
    let _handle = runner.run(&mut scenario).await?;

    Ok(())
}