refactor new_peak_timelord

chia/_tests/blockchain/test_blockchain.py

@@ -3627,8 +3627,15 @@ async def test_reorg_new_ref(empty_blockchain: Blockchain, bt: BlockTools) -> No
         fork_info: Optional[ForkInfo] = None
         if i < 10:
             expected = AddBlockResult.ALREADY_HAVE_BLOCK
-        elif i < 20:
+        elif i < 19:
             expected = AddBlockResult.ADDED_AS_ORPHAN
+        elif i == 19:
+            # same height as peak decide by iterations
+            peak = b.get_peak()
+            assert peak is not None
+            # same height as peak should be ADDED_AS_ORPHAN if  block.total_iters >= peak.total_iters
+            assert block.total_iters < peak.total_iters
+            expected = AddBlockResult.NEW_PEAK
         else:
             expected = AddBlockResult.NEW_PEAK
             if fork_info is None: