[test] Test abortrescan command.

test/functional/import-abort-rescan.py

@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+# Copyright (c) 2017 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 wallet import RPCs.
+
+Test rescan behavior of importprivkey when aborted. The test ensures that:
+1. The abortrescan command indeed stops the rescan process.
+2. Subsequent rescan catches the aborted address UTXO
+"""
+
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import (assert_equal, get_rpc_proxy)
+from decimal import Decimal
+import threading # for bg importprivkey
+import time      # for sleep
+
+class ImportAbortRescanTest(BitcoinTestFramework):
+    def __init__(self):
+        super().__init__()
+        self.setup_clean_chain = True
+
+    def run_test(self):
+        # Generate for BTC
+        assert_equal(self.nodes[0].getbalance(), 0)
+        assert_equal(self.nodes[1].getbalance(), 0)
+        self.nodes[0].generate(300)
+        assert_equal(self.nodes[1].getbalance(), 0)
+        # Make blocks with spam to cause rescan delay
+        for i in range(5):
+            for j in range(5):
+                self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 0.1)
+            self.nodes[0].generate(10)
+        addr = self.nodes[0].getnewaddress()
+        privkey = self.nodes[0].dumpprivkey(addr)
+        self.nodes[0].sendtoaddress(addr, 0.123)
+        self.nodes[0].generate(10) # mature tx
+        self.sync_all()
+
+        # Import this address in the background ...
+        node1ref = get_rpc_proxy(self.nodes[1].url, 1, timeout=600)
+        importthread = threading.Thread(target=node1ref.importprivkey, args=[privkey])
+        importthread.start()
+        # ... then abort rescan; try a bunch until abortres becomes true,
+        # because we will start checking before above thread starts processing
+        for i in range(2000):
+            time.sleep(0.001)
+            abortres = self.nodes[1].abortrescan()
+            if abortres: break
+        assert abortres # if false, we failed to abort
+        # import should die soon
+        for i in range(10):
+            time.sleep(0.1)
+            deadres = not importthread.isAlive()
+            if deadres: break
+
+        assert deadres # if false, importthread did not die soon enough
+        assert_equal(self.nodes[1].getbalance(), 0.0)
+
+        # Import a different address and let it run
+        self.nodes[1].importprivkey(self.nodes[0].dumpprivkey(self.nodes[0].getnewaddress()))
+        # Expect original privkey to now also be discovered and added to balance
+        assert_equal(self.nodes[1].getbalance(), Decimal("0.123"))
+
+if __name__ == "__main__":
+    ImportAbortRescanTest().main()

test/functional/test_runner.py

@@ -108,6 +108,7 @@ BASE_SCRIPTS= [
     'rpcnamedargs.py',
     'listsinceblock.py',
     'p2p-leaktests.py',
+    'import-abort-rescan.py',
 ]
 
 ZMQ_SCRIPTS = [