add a client example

examples/client.rs

@@ -0,0 +1,29 @@
+use futures_util::{SinkExt, StreamExt};
+
+#[tokio::main]
+async fn main() {
+    let ws = tokio_tungstenite_wasm::connect("wss://echo.websocket.org/")
+        .await
+        .unwrap();
+    let (mut sender, mut receiver) = ws.split();
+
+    println!("Connected to echo server.");
+
+    let msg = receiver.next().await.unwrap().unwrap();
+    assert!(msg.into_text().unwrap().starts_with("Request served by"));
+
+    println!("Recieved initial connection message.");
+
+    let payload = "This is a test message.";
+    sender
+        .send(tokio_tungstenite_wasm::Message::text(payload))
+        .await
+        .unwrap();
+
+    println!("Sent payload to echo server. Waiting for response...");
+
+    let msg = receiver.next().await.unwrap().unwrap();
+    assert_eq!(msg, tokio_tungstenite_wasm::Message::text(payload));
+
+    println!("Received and validated response.")
+}