Add test to verify urlencoded deserializer works with serde attributes

tests/url_deserialize.rs

@@ -141,6 +141,46 @@ fn deserialize_multiple_lists() {
     );
 }
 
+#[test]
+fn deserialize_with_serde_attributes() {
+    use std::time::{Duration, SystemTime, UNIX_EPOCH};
+
+    #[derive(Debug, PartialEq, Deserialize)]
+    struct FieldsWithAttributes {
+        #[serde(default)]
+        xs: Vec<bool>,
+        #[serde(default)]
+        def: Option<u8>,
+        #[serde(
+            default,
+            deserialize_with = "ruma_serde::time::opt_ms_since_unix_epoch::deserialize"
+        )]
+        time: Option<SystemTime>,
+        #[serde(default)]
+        flag: bool,
+    }
+
+    assert_eq!(
+        urlencoded::from_str("xs=true&xs=false&def=3&time=1&flag=true"),
+        Ok(FieldsWithAttributes {
+            xs: vec![true, false],
+            def: Some(3),
+            time: Some(UNIX_EPOCH + Duration::from_millis(1)),
+            flag: true,
+        })
+    );
+
+    assert_eq!(
+        urlencoded::from_str(""),
+        Ok(FieldsWithAttributes {
+            xs: vec![],
+            def: None,
+            time: None,
+            flag: false,
+        })
+    );
+}
+
 #[test]
 fn deserialize_nested_list() {
     assert!(urlencoded::from_str::<Vec<(&str, Vec<Vec<bool>>)>>("a=b").is_err());