test: get first_seen of a transaction

Author: uvuvuwu

crates/chain/tests/test_tx_graph.rs

@@ -1401,3 +1401,31 @@ fn test_get_first_seen_of_a_tx() {
     let first_seen = graph.get_tx_node(txid).unwrap().first_seen;
     assert_eq!(first_seen, Some(seen_at));
 }
+
+#[test]
+fn test_get_first_seen_of_a_tx() {
+    let mut graph = TxGraph::<BlockId>::default();
+
+    let tx = Transaction {
+        version: transaction::Version::ONE,
+        lock_time: absolute::LockTime::ZERO,
+        input: vec![TxIn {
+            previous_output: OutPoint::null(),
+            ..Default::default()
+        }],
+        output: vec![TxOut {
+            value: Amount::from_sat(50_000),
+            script_pubkey: ScriptBuf::new(),
+        }],
+    };
+    let txid = tx.compute_txid();
+    let seen_at = 1_000_000_u64;
+
+    let changeset_tx = graph.insert_tx(Arc::new(tx));
+    graph.apply_changeset(changeset_tx);
+    let changeset_seen = graph.insert_seen_at(txid, seen_at);
+    graph.apply_changeset(changeset_seen);
+
+    let first_seen = graph.get_tx_node(txid).unwrap().first_seen;
+    assert_eq!(first_seen, Some(seen_at));
+}