[test] explicitly check default -minrelaytxfee and -incrementalrelayfee

test/functional/mempool_accept.py

@@ -10,6 +10,10 @@ import math
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.blocktools import MAX_STANDARD_TX_WEIGHT
+from test_framework.mempool_util import (
+    DEFAULT_MIN_RELAY_TX_FEE,
+    DEFAULT_INCREMENTAL_RELAY_FEE,
+)
 from test_framework.messages import (
     MAX_BIP125_RBF_SEQUENCE,
     COIN,
@@ -85,6 +89,11 @@ class MempoolAcceptanceTest(BitcoinTestFramework):
         assert_equal(node.getblockcount(), 200)
         assert_equal(node.getmempoolinfo()['size'], self.mempool_size)
 
+        self.log.info("Check default settings")
+        # Settings are listed in BTC/kvB
+        assert_equal(node.getmempoolinfo()['minrelaytxfee'], Decimal(DEFAULT_MIN_RELAY_TX_FEE) / COIN)
+        assert_equal(node.getmempoolinfo()['incrementalrelayfee'], Decimal(DEFAULT_INCREMENTAL_RELAY_FEE) / COIN)
+
         self.log.info('Should not accept garbage to testmempoolaccept')
         assert_raises_rpc_error(-3, 'JSON value of type string is not of expected type array', lambda: node.testmempoolaccept(rawtxs='ff00baar'))
         assert_raises_rpc_error(-8, 'Array must contain between 1 and 25 transactions.', lambda: node.testmempoolaccept(rawtxs=['ff22']*26))

test/functional/test_framework/mempool_util.py

@@ -30,6 +30,11 @@ from .wallet import (
     MiniWallet,
 )
 
+# Default for -minrelaytxfee in sat/kvB
+DEFAULT_MIN_RELAY_TX_FEE = 1000
+# Default for -incrementalrelayfee in sat/kvB
+DEFAULT_INCREMENTAL_RELAY_FEE = 1000
+
 def assert_mempool_contents(test_framework, node, expected=None, sync=True):
     """Assert that all transactions in expected are in the mempool,
     and no additional ones exist. 'expected' is an array of