add negative test

Author: trungda

tokio-postgres/src/config.rs

@@ -1051,4 +1051,10 @@ mod tests {
 
         assert_eq!(1, 1);
     }
+
+    #[test]
+    fn test_invalid_hostaddr_parsing() {
+        let s = "user=pass_user dbname=postgres host=host1 hostaddr=127.0.0 port=26257";
+        s.parse::<Config>().err().unwrap();
+    }
 }

tokio-postgres/src/connect.rs

@@ -55,7 +55,7 @@ where
         // if it's not present, use the value of hostaddr.
         let hostname = match host {
             Some(Host::Tcp(host)) => host.clone(),
-            // postgres doesn't support TLS over unix sockets, so the choice here doesn't matter        Some()
+            // postgres doesn't support TLS over unix sockets, so the choice here doesn't matter
             #[cfg(unix)]
             Some(Host::Unix(_)) => "".to_string(),
             None => hostaddr.map_or("".to_string(), |ipaddr| ipaddr.to_string()),