Make api::v2::asset::Asset serializable

This change makes objects of the type api::v2::asset::Asset
serializable, so that we are not only able to parse them from an
upstream source but can also emit them ourselves.

Author: d-e-s-o

src/api/v2/asset.rs

@@ -314,7 +314,7 @@ impl FromStr for Exchange {
 
 
 /// The representation of an asset as used by Alpaca.
-#[derive(Clone, Debug, Deserialize, Eq, PartialEq)]
+#[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
 #[non_exhaustive]
 pub struct Asset {
   /// The asset's ID.
@@ -499,6 +499,20 @@ mod tests {
     assert_eq!(asset.exchange, Exchange::Unknown);
   }
 
+  /// Check that we can serialize and deserialize an `Asset` object.
+  #[test(tokio::test)]
+  async fn serialize_deserialize_asset() {
+    let api_info = ApiInfo::from_env().unwrap();
+    let client = Client::new(api_info);
+    let asset = client
+      .issue::<Get>(&Symbol::try_from("SPY").unwrap())
+      .await
+      .unwrap();
+
+    let json = to_json(&asset).unwrap();
+    assert_eq!(from_json::<Asset>(&json).unwrap(), asset);
+  }
+
   /// Check that we can retrieve information about an asset.
   #[test(tokio::test)]
   async fn retrieve_asset() {