test: run mempool_spend_coinbase.py even with wallet disabled #20385

  40 | +        # too immature to spend.
  41 |          b = [self.nodes[0].getblockhash(n) for n in range(101, 103)]
  42 |          coinbase_txids = [self.nodes[0].getblock(h)['tx'][0] for h in b]
  43 | -        spends_raw = [create_raw_transaction(self.nodes[0], txid, node0_address, amount=49.99) for txid in coinbase_txids]
  44 | +        utxo_101 = next(filter(lambda utxo: coinbase_txids[0] == utxo['txid'], wallet._utxos))
  45 | +        utxo_102 = next(filter(lambda utxo: coinbase_txids[1] == utxo['txid'], wallet._utxos))

---

  49 |  
  50 |          # coinbase at height 102 should be too immature to spend
  51 | -        assert_raises_rpc_error(-26,"bad-txns-premature-spend-of-coinbase", self.nodes[0].sendrawtransaction, spends_raw[1])
  52 | +        assert_raises_rpc_error(-26,
  53 | +                                "bad-txns-premature-spend-of-coinbase",
  54 | +                                lambda utxo: wallet.send_self_transfer(from_node=self.nodes[0], utxo_to_spend=utxo),

---

  39 | @@ -40,9 +40,20 @@ def generate(self, num_blocks):
  40 |              self._utxos.append({'txid': cb_tx['txid'], 'vout': 0, 'value': cb_tx['vout'][0]['value']})
  41 |          return blocks
  42 |  
  43 | -    def get_utxo(self):
  44 | -        """Return the last utxo. Can be used to get the change output immediately after a send_self_transfer"""
  45 | -        return self._utxos.pop()
  46 | +    def get_utxo(self, txid=''):

---