ut: Add test_server_lifetime

Add ut for server's lifetime.

Fixes: #284

Signed-off-by: jokemanfire <hu.dingyang@zte.com.cn>
Signed-off-by: Tim Zhang <tim@hyper.sh>

Author: Tim-Zhang

src/asynchronous/server.rs

@@ -601,3 +601,36 @@ impl HandlerContext {
             .ok();
     }
 }
+
+#[cfg(target_os = "linux")]
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    pub const SOCK_ADDR: &str = r"unix://@/tmp/ttrpc-server-unit-test";
+
+    pub fn is_socket_in_use(sock_path: &str) -> bool {
+        let output = std::process::Command::new("bash")
+            .args(["-c", &format!("lsof -U|grep {}", sock_path)])
+            .output()
+            .expect("Failed to execute lsof command");
+
+        output.status.success()
+    }
+
+    #[tokio::test]
+    async fn test_server_lifetime() {
+        let addr = SOCK_ADDR
+            .strip_prefix("unix://@")
+            .expect("socket address is not expected");
+        {
+            let mut server = Server::new().bind(SOCK_ADDR).unwrap();
+            server.start().await.unwrap();
+            assert!(is_socket_in_use(addr));
+        }
+
+        // Sleep to wait for shutdown of server caused by server's lifetime over
+        tokio::time::sleep(std::time::Duration::from_secs(1)).await;
+        assert!(!is_socket_in_use(addr));
+    }
+}