added accessor for client id (#216)

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ibapi"
-version = "1.0.13"
+version = "1.0.14"
 edition = "2021"
 authors = ["Wil Boayue <[email protected]>"]
 description = "A Rust implementation of the Interactive Brokers TWS API, providing a reliable and user friendly interface for TWS and IB Gateway. Designed with a focus on simplicity and performance."

src/client.rs

@@ -89,6 +89,11 @@ impl Client {
         Ok(client)
     }
 
+    /// Returns the ID assigned to the [Client].
+    pub fn client_id(&self) -> i32 {
+        self.client_id
+    }
+
     /// Returns the next request ID.
     pub fn next_request_id(&self) -> i32 {
         self.next_request_id.fetch_add(1, Ordering::Relaxed)

src/client/tests.rs

@@ -1 +1,17 @@
+use std::sync::Arc;
 
+use crate::{stubs::MessageBusStub, transport::ConnectionMetadata};
+
+use super::Client;
+
+
+#[test]
+fn test_client_id() {
+    let client_id = 500;
+    let connection_metadata = ConnectionMetadata{client_id, ..ConnectionMetadata::default()};
+    let message_bus = Arc::new(MessageBusStub::default());
+
+    let client = Client::new(connection_metadata, message_bus).unwrap();
+
+    assert_eq!(client.client_id(), client_id);
+}