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pub mod event;
pub mod message;
pub mod state;
// Soon...
// macro_rules! event_loop {
// () => {};
// }
#[cfg(test)]
mod test {
use std::fmt::{Display, Formatter};
use std::sync::Arc;
use tokio::sync::{mpsc, RwLock};
use tokio::task::JoinHandle;
use super::*;
// use state::State;
use event::EventLoop;
use crate::message::{MessageEmitter, MessageHandle};
#[derive(Debug)]
enum TestMessage {
Increment,
Decrement,
GetCurrent,
GetError,
}
#[derive(Debug)]
enum TestResponse {
Current(usize),
}
#[derive(Debug)]
struct TestClose;
impl Display for TestClose {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
write!(f, "TestClose")
}
}
#[derive(Debug, PartialEq)] // PartialEq is required for the test, not a normal requirement
enum TestError {
TestError,
FailedToIncrement,
FailedToDecrement,
FailedToGetCurrent,
AlreadyClosed,
}
impl Display for TestError {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
match self {
TestError::TestError =>
write!(f, "Error used to test errors"),
TestError::FailedToIncrement =>
write!(f, "Failed to increment number"),
TestError::FailedToDecrement =>
write!(f, "Failed to decrement number"),
TestError::FailedToGetCurrent =>
write!(f, "Failed to get current number"),
TestError::AlreadyClosed =>
write!(f, "Already closed"),
}
}
}
impl std::error::Error for TestError {}
type TestMessageType = message::MessageType<TestMessage, TestResponse, TestClose, TestError>;
#[derive(Clone)]
struct TestEventLoop {
// state: Arc<TestState>,
event_handle: Arc<RwLock<JoinHandle<Result<TestClose, TestError>>>>,
message_handle: MessageHandle<TestMessage, TestResponse, TestClose, TestError>,
}
impl TestEventLoop {
async fn new() -> Self {
let (message_tx, mut message_rx) = mpsc::channel::<TestMessageType>(256);
// let thread_state = Arc::new(TestState {});
// let state = Arc::clone(&thread_state);
let event_loop = tokio::spawn(async move {
//let state = thread_state;
let mut message_rx = message_rx;
//let mut reference_count: usize = 0;
let mut num = 0;
loop {
tokio::select! {
m = message_rx.recv() => {
if let Some(m) = m {
match m {
TestMessageType::Event(mut message) => {
match message.message() {
// Notifications
TestMessage::Decrement => {
num-= 1
}
TestMessage::Increment => {
num+= 1
}
// Messages
TestMessage::GetCurrent=> {
match message.callback_ok(TestResponse::Current(num)) {
Ok(_) => {}
Err(_) => {
#[cfg(debug_assertions)]
dbg!("Failed to send TestResponse::Current");
}
}
}
TestMessage::GetError => {
match message.callback_err(TestError::TestError) {
Ok(_) => {}
Err(_) => {
#[cfg(debug_assertions)]
dbg!("Failed to send TestError::TestError");
}
}
}
}
},
TestMessageType::Close(reason) => {
#[cfg(debug_assertions)]
dbg!("Closing TestEventLoop: {}", reason.to_string());
break Ok(reason)
}
_ => todo!()
}
}
}
}
}
});
Self {
//state,
event_handle: Arc::new(RwLock::new(event_loop)),
message_handle: MessageHandle::new(message_tx),
}
}
pub async fn increment(&self) -> Result<(), TestError> {
match self.message_handle.send_notification(TestMessage::Increment, "increment").await {
Ok(_) => Ok(()),
Err(_e) => Err(TestError::FailedToIncrement)
}
}
pub async fn decrement(&self) -> Result<(), TestError> {
match self.message_handle.send_notification(TestMessage::Decrement, "decrement").await {
Ok(_) => Ok(()),
Err(_e) => Err(TestError::FailedToDecrement)
}
}
pub async fn current(&self) -> Result<usize, TestError> {
// if we know the response here could we convert on the fly?
match self.message_handle.send_message(TestMessage::GetCurrent, "current").await {
Ok(res) => {
match res {
TestResponse::Current(i) => Ok(i),
//_ => unreachable!()
}
}
Err(_e) => Err(TestError::FailedToGetCurrent)
}
}
// TODO: Make a wrapper proc macro for this
pub async fn error_test(&self) -> Result<(), TestError> {
match self.message_handle.send_message(TestMessage::GetError, "error_test").await {
Ok(_) => unreachable!(),
Err(_e) => Err(TestError::TestError)
}
}
}
// #[derive(Debug)]
// struct TestState {
// }
// impl State for TestEventLoop {
// type State = TestState;
// fn state(&self) -> &Arc<Self::State> {
// &self.state
// }
// }
impl MessageEmitter for TestEventLoop {
type Message = TestMessage;
type Response = TestResponse;
fn message_handle(&self) -> &MessageHandle<Self::Message, TestResponse, TestClose, TestError> {
&self.message_handle
}
}
#[async_trait::async_trait]
impl EventLoop for TestEventLoop {
type Close = TestClose;
type Err = TestError;
fn event_loop_join_handle(&self) -> &Arc<RwLock<JoinHandle<Result<Self::Close, Self::Err>>>> {
&self.event_handle
}
fn is_closed(&self) -> bool {
self.message_handle.is_closed()
}
async fn close(&self, reason: Self::Close) -> Result<(), Self::Err> {
self.message_handle.close(reason).await.map_err(|_| TestError::AlreadyClosed)
}
}
/// Returns how many successful increments were made
fn spawn_test_task(test_ref: TestEventLoop, inc: u32) -> JoinHandle<Result<u32, TestError>>
{
tokio::task::spawn(async move {
let test_event_loop_ref = test_ref;
let mut incs = 0;
for _ in 0..inc {
match test_event_loop_ref.increment().await {
Ok(_) => incs += 1,
Err(e) => {
println!("Failed to increment: {:?}", e);
}
}
}
Ok(incs)
})
}
#[tokio::test]
async fn test_event_system() {
// As the constructor returns a reference to the event loop, it is not directly the event loop
let main_task = TestEventLoop::new().await;
let task_1 = spawn_test_task(main_task.clone(), 1000);
let task_2 = spawn_test_task(main_task.clone(), 1000);
let (res_1, res_2) = tokio::join!(task_1,task_2);
print!("Task 1: {:?}, Task 2: {:?}", res_1, res_2);
let current = main_task.current().await.unwrap();
assert_eq!(current, 2000);
}
#[tokio::test]
async fn test_send_error() {
// As the constructor returns a reference to the event loop, it is not directly the event loop
let main_task = TestEventLoop::new().await;
let task_1 = spawn_test_task(main_task.clone(), 1000);
let (res_1) = tokio::join!(task_1);
let current = main_task.current().await.unwrap();
assert_eq!(current, 2000);
}
// test the error system
#[tokio::test]
async fn test_error_system() {
let test = TestEventLoop::new().await;
let err = test.error_test().await;
assert_eq!(err, Err(TestError::TestError));
}
#[tokio::test]
async fn test_close() {
let test = TestEventLoop::new().await;
let task_1 = test.clone();
assert_eq!(test.close(TestClose).await, Ok(()));
assert_eq!(task_1.close(TestClose).await, Err(TestError::AlreadyClosed));
}
}