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#![warn(missing_docs)]
#[cfg(test)]
extern crate rand;
pub use action::Action;
pub use node::{Node, NodeOptions};
pub use system::System;
mod action;
mod missing;
mod node;
mod system;
pub mod message;
pub mod time;
#[cfg(test)]
mod tests {
use std::time::Duration;
use super::*;
use message::Message;
struct TestSystem;
impl System for TestSystem {
type NodeId = String;
type MessageId = u64;
type MessagePayload = ();
}
#[test]
fn single_node_works() {
let mut node = Node::<TestSystem>::new("foo".to_owned());
assert_eq!(node.eager_push_peers().len(), 0);
assert_eq!(node.lazy_push_peers().len(), 0);
assert_eq!(node.messages().len(), 0);
assert_eq!(node.waiting_messages(), 0);
assert_eq!(node.clock().now().as_duration(), Duration::from_secs(0));
assert!(node.poll_action().is_none());
node.broadcast_message(message(0));
let delivered = execute_single(&mut node);
assert_eq!(delivered, vec![message(0)]);
assert_eq!(node.messages().len(), 1);
assert_eq!(node.waiting_messages(), 0);
node.forget_message(&0);
assert_eq!(node.messages().len(), 0);
}
#[test]
fn multi_node_works() {
let mut nodes: Vec<Node<TestSystem>> = vec![
Node::new("foo".to_owned()),
Node::new("bar".to_owned()),
Node::new("baz".to_owned()),
Node::new("qux".to_owned()),
];
for edges in &[
("foo".to_owned(), "bar".to_owned()),
("foo".to_owned(), "qux".to_owned()),
("bar".to_owned(), "baz".to_owned()),
("bar".to_owned(), "qux".to_owned()),
][..]
{
get(&mut nodes, &edges.0).handle_neighbor_up(&edges.1);
get(&mut nodes, &edges.1).handle_neighbor_up(&edges.0);
}
assert_eq!(nodes[0].eager_push_peers().len(), 2);
assert_eq!(nodes[1].eager_push_peers().len(), 3);
assert_eq!(nodes[2].eager_push_peers().len(), 1);
assert_eq!(nodes[3].eager_push_peers().len(), 2);
nodes[0].broadcast_message(message(0));
execute(&mut nodes);
for node in &nodes {
assert_eq!(node.messages().len(), 1);
assert_eq!(node.messages().get(&0), Some(&()));
assert_eq!(node.waiting_messages(), 0);
}
}
#[test]
fn many_node_works() {
let mut nodes: Vec<Node<TestSystem>> = (0..500).map(|i| Node::new(i.to_string())).collect();
for i in 0..nodes.len() {
let neighbors = rand::random::<usize>() % 3 + 1;
for _ in 0..neighbors {
let j = rand::random::<usize>() % nodes.len();
nodes[i].handle_neighbor_up(&j.to_string());
nodes[j].handle_neighbor_up(&i.to_string());
}
}
const MESSAGE_COUNT: usize = 50;
for m in 0..MESSAGE_COUNT {
let sender = rand::random::<usize>() % nodes.len();
nodes[sender].broadcast_message(message(m as u64));
}
execute(&mut nodes);
for node in &nodes {
assert_eq!(node.messages().len(), MESSAGE_COUNT);
assert_eq!(node.waiting_messages(), 0);
}
}
fn message(id: u64) -> Message<TestSystem> {
Message { id, payload: () }
}
fn execute_single(node: &mut Node<TestSystem>) -> Vec<Message<TestSystem>> {
let mut delivered = Vec::new();
while let Some(action) = node.poll_action() {
match action {
Action::Deliver { message } => {
delivered.push(message);
}
Action::Send { .. } => panic!("{:?}", action),
}
}
delivered
}
fn get<'a>(nodes: &'a mut [Node<TestSystem>], id: &String) -> &'a mut Node<TestSystem> {
nodes.iter_mut().find(|n| n.id() == id).unwrap()
}
fn execute(nodes: &mut [Node<TestSystem>]) {
let mut did_something = true;
while did_something {
did_something = false;
let mut i = 0;
while i < nodes.len() {
while let Some(action) = nodes[i].poll_action() {
did_something = true;
match action {
Action::Deliver { .. } => {}
Action::Send {
destination,
message,
} => {
get(nodes, &destination).handle_protocol_message(message);
}
}
}
i += 1;
}
for node in nodes.iter_mut() {
node.clock_mut().tick(Duration::from_millis(100));
}
}
}
}