Serialize Album collection (#2)

Reviewed-on: #2

src/album.rs

@@ -37,7 +37,42 @@ pub mod collection {
         pub artist: String,
         pub disc: i32,
         pub track: i32,
-        // In seconds
+        /// In seconds
         pub duration: f64,
     }
+
+    pub fn deserialize_json(json_data: &str, album: &mut Album) -> Result<(), serde_json::Error> {
+        match serde_json::from_str::<Album>(json_data) {
+            Ok(parsed_album) => {
+                *album = parsed_album;
+                Ok(())
+            }
+            Err(err) => Err(err),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_deserilize_album_collection_json() {
+        let album_file_path = "tests/album.json";
+        let album_file_content = match std::fs::read_to_string(album_file_path) {
+            Ok(content) => content,
+            Err(err) => {
+                assert!(false, "Error: {err:?}");
+                String::new()
+            }
+        };
+
+        let mut album = super::collection::Album::default();
+        match super::collection::deserialize_json(&album_file_content, &mut album) {
+            Ok(_) => {
+                assert_eq!(3, album.tracks.len(), "Track count do not match");
+            }
+            Err(err) => {
+                assert!(false, "Error: {err:?}");
+            }
+        }
+    }
 }