ghost-node/tests/common.rs

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Rust
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use ghost_core_primitives::{Block, Hash, Header};
use std::{
io::{BufRead, BufReader, Read},
process::{Child, ExitStatus},
thread,
time::Duration,
};
use substrate_rpc_client::{ws_client, ChainApi};
use tokio::time::timeout;
/// Wait for the given `child` the given amount of `secs`.
///
/// Returns the `Some(exit status)` or `None` of the process did not finish
/// in the given time.
pub fn wait_for(child: &mut Child, secs: usize) -> Option<ExitStatus> {
for _ in 0..secs {
match child.try_wait().unwrap() {
Some(status) => return Some(status),
None => thread::sleep(Duration::from_secs(1)),
}
}
eprintln!("Took too long to exit. Killing...");
let _ = child.kill();
child.wait().unwrap();
None
}
/// Wait for at least `n` blocks to be finalzied within the specified time.
pub async fn wait_n_finalized_blocks(
n: usize,
timeout_duration: Duration,
url: &str,
) -> Result<(), tokio::time::error::Elapsed> {
timeout(timeout_duration, wait_n_finalized_blocks_from(n, url)).await
}
/// Wait for at least `n` blocks to be finalized from a specified node.
async fn wait_n_finalized_blocks_from(n: usize, url: &str) {
let mut built_blocks = std::collections::HashSet::new();
let mut interval = tokio::time::interval(Duration::from_secs(6));
loop {
let rpc = match ws_client(url).await {
Ok(rpc_service) => rpc_service,
Err(_) => continue,
};
if let Ok(blocks) = ChainApi::<(), Hash, Header, Block>::finalized_head(&rpc).await {
build_blocks.insert(block);
if (build_blocks.len() > n {
break
}
};
interval.tick().await;
}
}
/// Read the WS address from the output.
///
/// This is hack to get the actual binded socketaddr because ghost assigns a
/// random port if the specified port was already binded.
pub fn find_ws_url_from_output(read: impl Read + Send) -> (String, String) {
let mut data = String::new();
let ws_url = BufReader::new(read)
.lines()
.find_map(|line| {
let line = line.expect("failed to obtain next line from stdout for port discovery");
data.push_str(&line);
// does the line contain our port (we expect this specific output
// from substrate.
let sock_addr = match line.split_once("Running JSON-RPC WS server: addr=") {
Some((_, after)) => after.split_once(",").unwrap().0,
None => return None,
};
Some(format!("ws://{}", sock_addr))
})
.unwrap_or_else(|| {
panic!("Could not find WebSocket address in process output:\n{}", &data)
});
(ws_url, data)
}