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// Copyright 2019-2021 Parity Technologies (UK) Ltd.
//
// Permission is hereby granted, free of charge, to any
// person obtaining a copy of this software and associated
// documentation files (the "Software"), to deal in the
// Software without restriction, including without
// limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice
// shall be included in all copies or substantial portions
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
// IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
use std::collections::HashMap;
use jsonrpsee::core::error::{Error, SubscriptionClosed, SubscriptionClosedReason};
use jsonrpsee::types::{EmptyParams, Params};
// Helper macro to assert that a binding is of a specific type.
macro_rules! assert_type {
( $ty:ty, $expected:expr $(,)?) => {{
fn assert_type<Expected>(_expected: &Expected) {}
assert_type::<$ty>($expected)
}};
}
#[test]
fn rpc_modules_with_different_contexts_can_be_merged() {
let cx = Vec::<u8>::new();
let mut mod1 = RpcModule::new(cx);
mod1.register_method("bla with Vec context", |_: Params, _| Ok(())).unwrap();
let mut mod2 = RpcModule::new(String::new());
mod2.register_method("bla with String context", |_: Params, _| Ok(())).unwrap();
mod1.merge(mod2).unwrap();
assert!(mod1.method("bla with Vec context").is_some());
assert!(mod1.method("bla with String context").is_some());
}
#[test]
fn flatten_rpc_modules() {
let mod1 = RpcModule::new(String::new());
assert_type!(RpcModule<String>, &mod1);
let unit_mod = mod1.remove_context();
assert_type!(RpcModule<()>, &unit_mod);
}
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#[test]
fn rpc_context_modules_can_register_subscriptions() {
let cx = ();
let mut cxmodule = RpcModule::new(cx);
let _subscription = cxmodule.register_subscription("hi", "hi", "goodbye", |_, _, _| Ok(()));
assert!(cxmodule.method("hi").is_some());
assert!(cxmodule.method("goodbye").is_some());
}
#[test]
fn rpc_register_alias() {
let mut module = RpcModule::new(());
module.register_method("hello_world", |_: Params, _| Ok(())).unwrap();
module.register_alias("hello_foobar", "hello_world").unwrap();
assert!(module.method("hello_world").is_some());
assert!(module.method("hello_foobar").is_some());
}
#[tokio::test]
async fn calling_method_without_server() {
// Call sync method with no params
let mut module = RpcModule::new(());
module.register_method("boo", |_: Params, _| Ok(String::from("boo!"))).unwrap();
let res: String = module.call("boo", EmptyParams::new()).await.unwrap();
assert_eq!(&res, "boo!");
// Call sync method with params
module
.register_method("foo", |params, _| {
let n: u16 = params.one()?;
Ok(n * 2)
})
.unwrap();
let res: u64 = module.call("foo", [3_u64]).await.unwrap();
assert_eq!(res, 6);
// Call sync method with bad param
let err = module.call::<_, ()>("foo", (false,)).await.unwrap_err();
assert!(
matches!(err, Error::Request(err) if err == r#"{"jsonrpc":"2.0","error":{"code":-32602,"message":"invalid type: boolean `false`, expected u16 at line 1 column 6"},"id":0}"#)
);
// Call async method with params and context
struct MyContext;
impl MyContext {
fn roo(&self, things: Vec<u8>) -> u16 {
things.iter().sum::<u8>().into()
}
}
let mut module = RpcModule::new(MyContext);
module
.register_async_method("roo", |params, ctx| {
let ns: Vec<u8> = params.parse().expect("valid params please");
async move { Ok(ctx.roo(ns)) }
})
.unwrap();
let res: u64 = module.call("roo", [12, 13]).await.unwrap();
assert_eq!(res, 25);
}
#[tokio::test]
async fn calling_method_without_server_using_proc_macro() {
use jsonrpsee::{core::async_trait, proc_macros::rpc};
// Setup
#[derive(Debug, Deserialize, Serialize)]
#[allow(unreachable_pub)]
pub struct Gun {
shoots: bool,
}
#[derive(Debug, Deserialize, Serialize)]
#[allow(unreachable_pub)]
pub struct Beverage {
ice: bool,
}
#[rpc(server)]
pub trait Cool {
/// Sync method, no params.
#[method(name = "rebel_without_cause")]
fn rebel_without_cause(&self) -> Result<bool, Error>;
/// Sync method.
#[method(name = "rebel")]
fn rebel(&self, gun: Gun, map: HashMap<u8, u8>) -> Result<String, Error>;
/// Async method.
#[method(name = "revolution")]
async fn can_have_any_name(&self, beverage: Beverage, some_bytes: Vec<u8>) -> Result<String, Error>;
}
struct CoolServerImpl;
#[async_trait]
impl CoolServer for CoolServerImpl {
fn rebel_without_cause(&self) -> Result<bool, Error> {
Ok(false)
}
fn rebel(&self, gun: Gun, map: HashMap<u8, u8>) -> Result<String, Error> {
Ok(format!("{} {:?}", map.values().len(), gun))
}
async fn can_have_any_name(&self, beverage: Beverage, some_bytes: Vec<u8>) -> Result<String, Error> {
Ok(format!("drink: {:?}, phases: {:?}", beverage, some_bytes))
}
}
let module = CoolServerImpl.into_rpc();
// Call sync method with no params
let res: bool = module.call("rebel_without_cause", EmptyParams::new()).await.unwrap();
assert!(!res);
// Call sync method with params
let res: String = module.call("rebel", (Gun { shoots: true }, HashMap::<u8, u8>::default())).await.unwrap();
assert_eq!(&res, "0 Gun { shoots: true }");
// Call sync method with bad params
let err = module.call::<_, ()>("rebel", (Gun { shoots: true }, false)).await.unwrap_err();
assert!(matches!(
err,
Error::Request(err) if err == r#"{"jsonrpc":"2.0","error":{"code":-32602,"message":"invalid type: boolean `false`, expected a map at line 1 column 5"},"id":0}"#
));
// Call async method with params and context
let result: String = module.call("revolution", (Beverage { ice: true }, vec![1, 2, 3])).await.unwrap();
assert_eq!(&result, "drink: Beverage { ice: true }, phases: [1, 2, 3]");
}
#[tokio::test]
async fn subscribing_without_server() {
let mut module = RpcModule::new(());
module
.register_subscription("my_sub", "my_sub", "my_unsub", |_, mut sink, _| {
let mut stream_data = vec!['0', '1', '2'];
std::thread::spawn(move || {
while let Some(letter) = stream_data.pop() {
tracing::debug!("This is your friendly subscription sending data.");
if let Err(Error::SubscriptionClosed(_)) = sink.send(&letter) {
return;
}
std::thread::sleep(std::time::Duration::from_millis(500));
}
});
Ok(())
})
.unwrap();
let mut my_sub = module.subscribe("my_sub", EmptyParams::new()).await.unwrap();
for i in (0..=2).rev() {
let (val, id) = my_sub.next::<char>().await.unwrap().unwrap();
assert_eq!(val, std::char::from_digit(i, 10).unwrap());
assert_eq!(&id, my_sub.subscription_id());
}
let sub_err = my_sub.next::<char>().await.unwrap().unwrap_err();
let exp = SubscriptionClosed::new(SubscriptionClosedReason::Server("No close reason provided".to_string()));
// The subscription is now closed by the server.
assert!(matches!(sub_err, Error::SubscriptionClosed(close_reason) if close_reason == exp));
}
#[tokio::test]
async fn close_test_subscribing_without_server() {
let mut module = RpcModule::new(());
module
.register_subscription("my_sub", "my_sub", "my_unsub", |_, mut sink, _| {
std::thread::spawn(move || {
// make sure to only send one item
sink.send(&"lo").unwrap();
while !sink.is_closed() {
std::thread::sleep(std::time::Duration::from_millis(500));
}
// Get the close reason.
if let Error::SubscriptionClosed(close_reason) = sink.send(&"lo").unwrap_err() {
sink.close(&close_reason);
}
});
Ok(())
})
.unwrap();
let mut my_sub = module.subscribe("my_sub", EmptyParams::new()).await.unwrap();
let (val, id) = my_sub.next::<String>().await.unwrap().unwrap();
assert_eq!(&val, "lo");
assert_eq!(&id, my_sub.subscription_id());
// close the subscription to ensure it doesn't return any items.
my_sub.close();
// In this case, the unsubscribe method was not called and
// it will be treated as the connection was closed.
let exp = SubscriptionClosed::new(SubscriptionClosedReason::ConnectionReset);
assert!(
matches!(my_sub.next::<String>().await, Some(Err(Error::SubscriptionClosed(close_reason))) if close_reason == exp)
);