Bugfix: test/functional/mempool_accept: Ensure oversize transaction is actually oversize

Simply integer dividing results in an acceptable size if the limit isn't an exact multiple of the input size.
Use math.ceil to ensure the transaction is always oversize.

1 files changed, 2 insertions, 1 deletions

diff --git a/test/functional/mempool_accept.py b/test/functional/mempool_accept.py
index 44426a0ff7..005fc7ed32 100755
--- a/test/functional/mempool_accept.py
+++ b/test/functional/mempool_accept.py
@@ -5,6 +5,7 @@
 """Test mempool acceptance of raw transactions."""
 
 from io import BytesIO
+import math
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.messages import (
     BIP125_SEQUENCE_NUMBER,
@@ -178,7 +179,7 @@ class MempoolAcceptanceTest(BitcoinTestFramework):
 
         self.log.info('A really large transaction')
         tx.deserialize(BytesIO(hex_str_to_bytes(raw_tx_reference)))
-        tx.vin = [tx.vin[0]] * (MAX_BLOCK_BASE_SIZE // len(tx.vin[0].serialize()))
+        tx.vin = [tx.vin[0]] * math.ceil(MAX_BLOCK_BASE_SIZE / len(tx.vin[0].serialize()))
         self.check_mempool_result(
             result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': '16: bad-txns-oversize'}],
             rawtxs=[bytes_to_hex_str(tx.serialize())],