Add initial realloc test

token/program-2022/tests/memo_transfer.rs

@@ -73,3 +73,49 @@ async fn require_memo_transfers_without_realloc() {
     let bob_state = token.get_account_info(&bob_account).await.unwrap();
     assert_eq!(bob_state.base.amount, 21);
 }
+
+#[tokio::test]
+async fn require_memo_transfers_with_realloc() {
+    let mut context = TestContext::new().await;
+    context.init_token_with_mint(vec![]).await.unwrap();
+    let TokenContext {
+        mint_authority,
+        token,
+        alice,
+        bob,
+        ..
+    } = context.token_context.unwrap();
+
+    // create token accounts
+    let alice_account = token
+        .create_auxiliary_token_account(&alice, &alice.pubkey())
+        .await
+        .unwrap();
+    let bob_account = token
+        .create_auxiliary_token_account(&bob, &bob.pubkey())
+        .await
+        .unwrap();
+
+    // mint tokens
+    token
+        .mint_to(&alice_account, &mint_authority, 4242)
+        .await
+        .unwrap();
+
+    // require memo transfers into bob_account
+    token
+        .require_transfer_memos(&bob_account, &bob)
+        .await
+        .unwrap();
+
+    let bob_state = token.get_account_info(&bob_account).await.unwrap();
+    let extension = bob_state.get_extension::<MemoTransfer>().unwrap();
+    assert!(extension.require_incoming_transfer_memos != 0);
+
+    // attempt to transfer from alice to bob without memo
+    // TODO: should fail when token/program-2022/src/processor.rs#L376 is completed
+    token
+        .transfer_unchecked(&alice_account, &bob_account, &alice, 100)
+        .await
+        .unwrap();
+}