Add regression test for issue 523

src/types/update.rs

@@ -492,4 +492,25 @@ mod test {
             _ => panic!("Expected error"),
         }
     }
+
+    #[test]
+    fn issue_523() {
+        let json = r#"{
+            "update_id":0,
+            "my_chat_member": {
+                "chat":{"id":0,"first_name":"FN","last_name":"LN","username":"UN","type":"private"},
+                "from":{"id":0,"is_bot":false,"first_name":"FN","last_name":"LN","username":"UN"},
+                "date":1644677726,
+                "old_chat_member":{"user":{"id":1,"is_bot":true,"first_name":"bot","username":"unBot"},"status":"member"},
+                "new_chat_member":{"user":{"id":1,"is_bot":true,"first_name":"bot","username":"unBot"},"status":"kicked","until_date":0}
+            }
+        }"#;
+
+        let Update { kind, .. } = serde_json::from_str(json).unwrap();
+
+        match kind {
+            UpdateKind::MyChatMember(_) => {}
+            _ => panic!("Expected `MyChatMember`"),
+        }
+    }
 }