Simple event struct with serialization

src/event.rs

@@ -1 +1,72 @@
-pub struct Event {}
+use serde::{Deserialize, Deserializer, Serialize};
+use serde_json::json;
+use serde_json::Result;
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub struct Event {
+    id: u32,
+    pubkey: u32,
+    created_at: u64,
+    kind: u8,
+    tags: Vec<Vec<String>>,
+    content: String,
+    sig: u64,
+}
+
+// Goals:
+// Roundtrip from JSON-string to Event, and back to string.
+// Perform validation on an Event to ensure the id and signature are correct.
+
+#[cfg(test)]
+mod tests {
+    use crate::event::Event;
+    use serde_json::Result;
+    fn simple_event() -> Event {
+        super::Event {
+            id: 0,
+            pubkey: 0,
+            created_at: 0,
+            kind: 0,
+            tags: vec![],
+            content: "".to_owned(),
+            sig: 0,
+        }
+    }
+
+    #[test]
+    fn event_creation() {
+        // create an event
+        let event = simple_event();
+        assert_eq!(event.id, 0);
+    }
+
+    #[test]
+    fn event_serialize() -> Result<()> {
+        // serialize an event to JSON string
+        let event = simple_event();
+        let j = serde_json::to_string(&event)?;
+        assert_eq!(j, "{\"id\":0,\"pubkey\":0,\"created_at\":0,\"kind\":0,\"tags\":[],\"content\":\"\",\"sig\":0}");
+        Ok(())
+    }
+
+    #[test]
+    fn event_tags_serialize() -> Result<()> {
+        // serialize an event with tags to JSON string
+        let mut event = simple_event();
+        event.tags = vec![
+            vec![
+                "e".to_owned(),
+                "xxxx".to_owned(),
+                "wss://example.com".to_owned(),
+            ],
+            vec![
+                "p".to_owned(),
+                "yyyyy".to_owned(),
+                "wss://example.com:3033".to_owned(),
+            ],
+        ];
+        let j = serde_json::to_string(&event)?;
+        assert_eq!(j, "{\"id\":0,\"pubkey\":0,\"created_at\":0,\"kind\":0,\"tags\":[[\"e\",\"xxxx\",\"wss://example.com\"],[\"p\",\"yyyyy\",\"wss://example.com:3033\"]],\"content\":\"\",\"sig\":0}");
+        Ok(())
+    }
+}