Client can now perform requests asynchronously

tests/mod.rs

@@ -30,7 +30,7 @@ enum TestProtocol {
 async fn main() {
     let (qtx, qrx) = mpsc::channel(16);
     let (atx, arx) = mpsc::channel(16);
-    let mut client = TestProtocolClient::new(qtx, arx);
+    let client = TestProtocolClient::new(qtx, arx);
     let server = tokio::spawn(server_loop(qrx, atx));
     let result = client.addition(2, 5).await.unwrap();
     assert_eq!(result, 7);
@@ -86,3 +86,23 @@ async fn server_loop(
         }
     }
 }
+
+#[tokio::test]
+async fn heavy_async() {
+    let (qtx, qrx) = mpsc::channel(16);
+    let (atx, arx) = mpsc::channel(16);
+    let client = TestProtocolClient::new(qtx, arx);
+    let server = tokio::spawn(server_loop(qrx, atx));
+    let mut tasks = Vec::new();
+    for i in 0..100 {
+        let client = client.clone();
+        tasks.push(tokio::spawn(async move {
+            let result = client.addition(i, i).await.unwrap();
+            assert_eq!(result, i + i);
+        }));
+    }
+    for task in tasks {
+        task.await.unwrap();
+    }
+    server.abort();
+}