fix: mandate_type change & unittests (#132)

crates/router/src/routes/payment_methods.rs

@@ -142,3 +142,30 @@ pub async fn payment_method_delete_api(
     )
     .await
 }
+
+#[cfg(test)]
+mod tests {
+    use api_models::payment_methods::ListPaymentMethodRequest;
+
+    use super::*;
+
+    #[test]
+    fn test_custom_list_deserialization() {
+        let dummy_data = "amount=120&recurring_enabled=true&installment_payment_enabled=true&accepted_countries=US&accepted_countries=IN";
+        let de_query: web::Query<payment_methods::ListPaymentMethodRequest> =
+            web::Query::from_query(dummy_data).unwrap();
+        let de_struct = de_query.into_inner();
+        assert_eq!(
+            de_struct.accepted_countries,
+            Some(vec!["US".to_string(), "IN".to_string()])
+        )
+    }
+
+    #[test]
+    fn test_custom_list_deserialization_multi_amount() {
+        let dummy_data = "amount=120&recurring_enabled=true&amount=1000";
+        let de_query: Result<web::Query<ListPaymentMethodRequest>, _> =
+            web::Query::from_query(dummy_data);
+        assert!(de_query.is_err())
+    }
+}