test: Add test for erase orphan tx from peer

Author: hebasto

test/functional/p2p_invalid_tx.py

@@ -60,7 +60,6 @@ def run_test(self):
         block.solve()
         # Save the coinbase for later
         block1 = block
-        tip = block.sha256
         node.p2ps[0].send_blocks_and_test([block], node, success=True)
 
         self.log.info("Mature the block.")
@@ -157,13 +156,18 @@ def run_test(self):
         with node.assert_debug_log(['orphanage overflow, removed 1 tx']):
             node.p2ps[0].send_txs_and_test(orphan_tx_pool, node, success=False)
 
+        self.log.info('Test orphan with rejected parents')
         rejected_parent = CTransaction()
         rejected_parent.vin.append(CTxIn(outpoint=COutPoint(tx_orphan_2_invalid.sha256, 0)))
         rejected_parent.vout.append(CTxOut(nValue=11 * COIN, scriptPubKey=SCRIPT_PUB_KEY_OP_TRUE))
         rejected_parent.rehash()
         with node.assert_debug_log(['not keeping orphan with rejected parents {}'.format(rejected_parent.hash)]):
             node.p2ps[0].send_txs_and_test([rejected_parent], node, success=False)
 
+        self.log.info('Test that a peer disconnection causes erase its transactions from the orphan pool')
+        with node.assert_debug_log(['Erased 100 orphan tx from peer=25']):
+            self.reconnect_p2p(num_connections=1)
+
 
 if __name__ == '__main__':
     InvalidTxRequestTest().main()