test(electrum): added scan and reorg tests

Added scan and reorg tests to check electrum functionality using
`TestEnv`.

crates/electrum/tests/test_electrum.rs

@@ -188,7 +188,10 @@ fn tx_can_become_unconfirmed_after_reorg() -> Result<()> {
     let missing = relevant_txids.missing_full_txs(recv_graph.graph());
     let graph_update = relevant_txids.into_confirmation_time_tx_graph(&client, None, missing)?;
     let _ = recv_chain.apply_update(chain_update);
-    let _ = recv_graph.apply_update(graph_update);
+    let _ = recv_graph.apply_update(graph_update.clone());
+
+    // Retain a snapshot of all anchors before reog process.
+    let initial_anchors = graph_update.all_anchors();
 
     // Check if initial balance is correct.
     assert_eq!(
@@ -214,6 +217,11 @@ fn tx_can_become_unconfirmed_after_reorg() -> Result<()> {
         let graph_update =
             relevant_txids.into_confirmation_time_tx_graph(&client, None, missing)?;
         let _ = recv_chain.apply_update(chain_update);
+
+        // Check to see if a new anchor is added during current reorg.
+        if !initial_anchors.is_superset(graph_update.all_anchors()) {
+            println!("New anchor added at reorg depth {}", depth);
+        }
         let _ = recv_graph.apply_update(graph_update);
 
         assert_eq!(