message: test: run mempool_compatibility.py even with wallet disabled
diff: @@ -16,15 +16,15 @@ Only v0.15.2 is required by this test. The rest is used in other backwards compa
  import os
  from test_framework.test_framework import BitcoinTestFramework
  +from test_framework.wallet import MiniWallet
  class MempoolCompatibilityTest(BitcoinTestFramework):
  def set_test_params(self):
  self.num_nodes = 2
  - self.wallet_names = [None, self.default_wallet_name]
  + self.wallet_names = [None]
  def skip_test_if_missing_module(self):
  - self.skip_if_no_wallet()
  self.skip_if_no_previous_releases()
  def setup_network(self):
  @@ -38,8 +38,15 @@ class MempoolCompatibilityTest(BitcoinTestFramework):
  def run_test(self):
  self.log.info("Test that mempool.dat is compatible between versions")
  - old_node = self.nodes[0]
  - new_node = self.nodes[1]
  + old_node, new_node = self.nodes
  + new_wallet = MiniWallet(new_node)
  + new_wallet.generate(1)
  + new_node.generate(100)
  + # Sync the nodes to ensure old_node has the block that contains the coinbase that new_wallet will spend.
  + # Otherwise, because coinbases are only valid in a block and not as loose txns, if the nodes aren't synced
  + # unbroadcasted_tx won't pass old_node's `MemPoolAccept::PreChecks`.
  + self.connect_nodes(0, 1)
  + self.sync_blocks()
  recipient = old_node.getnewaddress()
  self.stop_node(1)
  @@ -58,7 +65,7 @@ class MempoolCompatibilityTest(BitcoinTestFramework):
  assert old_tx_hash in new_node.getrawmempool()
  self.log.info("Add unbroadcasted tx to mempool on new node and shutdown")
  - unbroadcasted_tx_hash = new_node.sendtoaddress(recipient, 0.0001)
  + unbroadcasted_tx_hash = new_wallet.send_self_transfer(from_node=new_node)['txid']
  assert unbroadcasted_tx_hash in new_node.getrawmempool()
  mempool = new_node.getrawmempool(True)
  assert mempool[unbroadcasted_tx_hash]['unbroadcast']
  