Merge bitcoin#20112: test: Speed up wallet_resendwallettransactions with mockscheduler RPC

fa299ac test: Speed up wallet_resendwallettransactions test with mockscheduler RPC (MarcoFalke)

Pull request description:

  Also fixes bitcoin#20143

ACKs for top commit:
  guggero:
    ACK fa299ac

Tree-SHA512: 024ced4aa5f5c266e24fd0583d47b45b19c2a6ae25a06fabeacaa0ac996eec0c45f11cc34b2df17d01759b78ed31a991aa86978aafcc76cb0017382f601bf85a

Author: MarcoFalke

test/functional/wallet_resendwallettransactions.py

@@ -11,6 +11,7 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal
 
+
 class ResendWalletTransactionsTest(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 1
@@ -27,10 +28,10 @@ def run_test(self):
         txid = node.sendtoaddress(node.getnewaddress(), 1)
 
         # Wallet rebroadcast is first scheduled 1 sec after startup (see
-        # nNextResend in ResendWalletTransactions()). Sleep for just over a
-        # second to be certain that it has been called before the first
+        # nNextResend in ResendWalletTransactions()). Tell scheduler to call
+        # MaybeResendWalletTxn now to initialize nNextResend before the first
         # setmocktime call below.
-        time.sleep(1.1)
+        node.mockscheduler(1)
 
         # Can take a few seconds due to transaction trickling
         peer_first.wait_for_broadcast([txid])
@@ -57,15 +58,16 @@ def run_test(self):
         twelve_hrs = 12 * 60 * 60
         two_min = 2 * 60
         node.setmocktime(now + twelve_hrs - two_min)
-        time.sleep(2) # ensure enough time has passed for rebroadcast attempt to occur
+        node.mockscheduler(1)  # Tell scheduler to call MaybeResendWalletTxn now
         assert_equal(int(txid, 16) in peer_second.get_invs(), False)
 
         self.log.info("Bump time & check that transaction is rebroadcast")
         # Transaction should be rebroadcast approximately 24 hours in the future,
         # but can range from 12-36. So bump 36 hours to be sure.
-        node.setmocktime(now + 36 * 60 * 60)
-        # Tell scheduler to call MaybeResendWalletTxn now.
-        node.mockscheduler(1)
+        with node.assert_debug_log(['ResendWalletTransactions: resubmit 1 unconfirmed transactions']):
+            node.setmocktime(now + 36 * 60 * 60)
+            # Tell scheduler to call MaybeResendWalletTxn now.
+            node.mockscheduler(1)
         # Give some time for trickle to occur
         node.setmocktime(now + 36 * 60 * 60 + 600)
         peer_second.wait_for_broadcast([txid])