Fix rpc alias(es) key constant (#375)

* Fix rpc alias(es) key constant

* Bump derive patch

derive/Cargo.toml

@@ -7,7 +7,7 @@ homepage = "https://github.com/paritytech/jsonrpc"
 license = "MIT"
 name = "jsonrpc-derive"
 repository = "https://github.com/paritytech/jsonrpc"
-version = "10.0.1"
+version = "10.0.2"
 
 [lib]
 proc-macro = true

derive/src/rpc_attr.rs

@@ -21,7 +21,7 @@ pub enum PubSubMethodKind {
 const RPC_ATTR_NAME: &'static str = "rpc";
 const RPC_NAME_KEY: &'static str = "name";
 const SUBSCRIPTION_NAME_KEY: &'static str = "subscription";
-const ALIASES_KEY: &'static str = "aliases";
+const ALIASES_KEY: &'static str = "alias";
 const PUB_SUB_ATTR_NAME: &'static str = "pubsub";
 const METADATA_META_WORD: &'static str = "meta";
 const SUBSCRIBE_META_WORD: &'static str = "subscribe";

derive/tests/macros.rs

@@ -22,7 +22,7 @@ pub trait Rpc {
 	fn neg(&self, _: i64) -> Result<i64>;
 
 	/// Adds two numbers and returns a result
-	#[rpc(name = "add")]
+	#[rpc(name = "add", alias("add_alias1", "add_alias2"))]
 	fn add(&self, _: u64, _: u64) -> Result<u64>;
 }
 
@@ -114,3 +114,33 @@ fn should_accept_multiple_params() {
 		"id": 1
 	}"#).unwrap());
 }
+
+#[test]
+fn should_use_method_name_aliases() {
+	let mut io = IoHandler::new();
+	let rpc = RpcImpl::default();
+	io.extend_with(rpc.to_delegate());
+
+	// when
+	let req1 = r#"{"jsonrpc":"2.0","id":1,"method":"add_alias1","params":[1, 2]}"#;
+	let req2 = r#"{"jsonrpc":"2.0","id":1,"method":"add_alias2","params":[1, 2]}"#;
+
+	let res1 = io.handle_request_sync(req1);
+	let res2 = io.handle_request_sync(req2);
+
+	// then
+	let result1: Response = serde_json::from_str(&res1.unwrap()).unwrap();
+	assert_eq!(result1, serde_json::from_str(r#"{
+		"jsonrpc": "2.0",
+		"result": 3,
+		"id": 1
+	}"#).unwrap());
+
+	let result2: Response = serde_json::from_str(&res2.unwrap()).unwrap();
+	assert_eq!(result2, serde_json::from_str(r#"{
+		"jsonrpc": "2.0",
+		"result": 3,
+		"id": 1
+	}"#).unwrap());
+}
+

derive/tests/pubsub-macros.rs

@@ -23,7 +23,7 @@ pub trait Rpc {
 	type Metadata;
 
 	/// Hello subscription
-	#[pubsub(subscription = "hello", subscribe, name = "hello_subscribe", alias("hello_sub"))]
+	#[pubsub(subscription = "hello", subscribe, name = "hello_subscribe", alias("hello_alias"))]
 	fn subscribe(&self, _: Self::Metadata, _: Subscriber<String>, _: u32, _: Option<u64>);
 
 	/// Unsubscribe from hello subscription.
@@ -87,3 +87,25 @@ fn test_invalid_trailing_pubsub_params() {
 	let result: jsonrpc_core::Response = serde_json::from_str(&res.unwrap()).unwrap();
 	assert_eq!(expected, result);
 }
+
+#[test]
+fn test_subscribe_with_alias() {
+	let mut io = PubSubHandler::default();
+	let rpc = RpcImpl::default();
+	io.extend_with(rpc.to_delegate());
+
+	// when
+	let meta = Metadata;
+	let req = r#"{"jsonrpc":"2.0","id":1,"method":"hello_alias","params":[1]}"#;
+	let res = io.handle_request_sync(req, meta);
+	let expected = r#"{
+		"jsonrpc": "2.0",
+		"result": 5,
+		"id": 1
+	}"#;
+
+	let expected: jsonrpc_core::Response = serde_json::from_str(expected).unwrap();
+	let result: jsonrpc_core::Response = serde_json::from_str(&res.unwrap()).unwrap();
+	assert_eq!(expected, result);
+}
+