1 files changed, 71 insertions, 0 deletions
diff --git a/test/functional/invalidateblock.py b/test/functional/invalidateblock.py
new file mode 100755
index 0000000000..8c80b64003
--- /dev/null
+++ b/test/functional/invalidateblock.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+# Copyright (c) 2014-2016 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 the invalidateblock RPC."""
+
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import *
+
+class InvalidateTest(BitcoinTestFramework):
+    
+        
+    def __init__(self):
+        super().__init__()
+        self.setup_clean_chain = True
+        self.num_nodes = 3
+
+    def setup_network(self):
+        self.nodes = []
+        self.is_network_split = False 
+        self.nodes.append(start_node(0, self.options.tmpdir))
+        self.nodes.append(start_node(1, self.options.tmpdir))
+        self.nodes.append(start_node(2, self.options.tmpdir))
+        
+    def run_test(self):
+        self.log.info("Make sure we repopulate setBlockIndexCandidates after InvalidateBlock:")
+        self.log.info("Mine 4 blocks on Node 0")
+        self.nodes[0].generate(4)
+        assert(self.nodes[0].getblockcount() == 4)
+        besthash = self.nodes[0].getbestblockhash()
+
+        self.log.info("Mine competing 6 blocks on Node 1")
+        self.nodes[1].generate(6)
+        assert(self.nodes[1].getblockcount() == 6)
+
+        self.log.info("Connect nodes to force a reorg")
+        connect_nodes_bi(self.nodes,0,1)
+        sync_blocks(self.nodes[0:2])
+        assert(self.nodes[0].getblockcount() == 6)
+        badhash = self.nodes[1].getblockhash(2)
+
+        self.log.info("Invalidate block 2 on node 0 and verify we reorg to node 0's original chain")
+        self.nodes[0].invalidateblock(badhash)
+        newheight = self.nodes[0].getblockcount()
+        newhash = self.nodes[0].getbestblockhash()
+        if (newheight != 4 or newhash != besthash):
+            raise AssertionError("Wrong tip for node0, hash %s, height %d"%(newhash,newheight))
+
+        self.log.info("Make sure we won't reorg to a lower work chain:")
+        connect_nodes_bi(self.nodes,1,2)
+        self.log.info("Sync node 2 to node 1 so both have 6 blocks")
+        sync_blocks(self.nodes[1:3])
+        assert(self.nodes[2].getblockcount() == 6)
+        self.log.info("Invalidate block 5 on node 1 so its tip is now at 4")
+        self.nodes[1].invalidateblock(self.nodes[1].getblockhash(5))
+        assert(self.nodes[1].getblockcount() == 4)
+        self.log.info("Invalidate block 3 on node 2, so its tip is now 2")
+        self.nodes[2].invalidateblock(self.nodes[2].getblockhash(3))
+        assert(self.nodes[2].getblockcount() == 2)
+        self.log.info("..and then mine a block")
+        self.nodes[2].generate(1)
+        self.log.info("Verify all nodes are at the right height")
+        time.sleep(5)
+        assert_equal(self.nodes[2].getblockcount(), 3)
+        assert_equal(self.nodes[0].getblockcount(), 4)
+        node1height = self.nodes[1].getblockcount()
+        if node1height < 4:
+            raise AssertionError("Node 1 reorged to a lower height: %d"%node1height)
+
+if __name__ == '__main__':
+    InvalidateTest().main()