Add RPC bumpfee totalFee deprecation test

Next steps: remove `totalFee` from the wallet_bumpfee functional tests.

test/functional/test_runner.py

@@ -173,6 +173,7 @@ BASE_SCRIPTS = [
     'rpc_bind.py --nonloopback',
     'mining_basic.py',
     'wallet_bumpfee.py',
+    'wallet_bumpfee_totalfee_deprecation.py',
     'rpc_named_arguments.py',
     'wallet_listsinceblock.py',
     'p2p_leak.py',

test/functional/wallet_bumpfee_totalfee_deprecation.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+# Copyright (c) 2019 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test deprecation of passing `totalFee` to the bumpfee RPC."""
+from decimal import Decimal
+
+from test_framework.messages import BIP125_SEQUENCE_NUMBER
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import assert_raises_rpc_error
+
+class BumpFeeWithTotalFeeArgumentDeprecationTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.num_nodes = 2
+        self.extra_args = [[
+            "-walletrbf={}".format(i),
+            "-mintxfee=0.00002",
+        ] for i in range(self.num_nodes)]
+
+    def skip_test_if_missing_module(self):
+        self.skip_if_no_wallet()
+
+    def run_test(self):
+        peer_node, rbf_node = self.nodes
+        peer_node.generate(110)
+        self.sync_all()
+        peer_node.sendtoaddress(rbf_node.getnewaddress(), 0.001)
+        self.sync_all()
+        peer_node.generate(1)
+        self.sync_all()
+        rbfid = spend_one_input(rbf_node, peer_node.getnewaddress())
+
+        self.log.info("Testing bumpfee with totalFee argument raises RPC error with deprecation message")
+        assert_raises_rpc_error(
+            -8,
+            "totalFee argument has been deprecated and will be removed in 0.20. " +
+            "Please use -deprecatedrpc=totalFee to continue using this argument until removal.",
+            rbf_node.bumpfee, rbfid, {"totalFee": 2000})
+
+        self.log.info("Testing bumpfee without totalFee argument does not raise")
+        rbf_node.bumpfee(rbfid)
+
+def spend_one_input(node, dest_address, change_size=Decimal("0.00049000")):
+    tx_input = dict(sequence=BIP125_SEQUENCE_NUMBER,
+                    **next(u for u in node.listunspent() if u["amount"] == Decimal("0.00100000")))
+    destinations = {dest_address: Decimal("0.00050000")}
+    destinations[node.getrawchangeaddress()] = change_size
+    rawtx = node.createrawtransaction([tx_input], destinations)
+    signedtx = node.signrawtransactionwithwallet(rawtx)
+    txid = node.sendrawtransaction(signedtx["hex"])
+    return txid
+
+if __name__ == "__main__":
+    BumpFeeWithTotalFeeArgumentDeprecationTest().main()