add RPC test for InvalidateBlock

Rebased-From: 88f6c8c365
Github-Pull: #5879

qa/rpc-tests/invalidateblock.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python2
+# Copyright (c) 2014 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 InvalidateBlock code
+#
+
+from test_framework import BitcoinTestFramework
+from bitcoinrpc.authproxy import AuthServiceProxy, JSONRPCException
+from util import *
+
+class InvalidateTest(BitcoinTestFramework):
+    
+        
+    def setup_chain(self):
+        print("Initializing test directory "+self.options.tmpdir)
+        initialize_chain_clean(self.options.tmpdir, 2)
+                 
+    def setup_network(self):
+        self.nodes = []
+        self.is_network_split = False 
+        self.nodes.append(start_node(0, self.options.tmpdir, ["-debug"]))
+        self.nodes.append(start_node(1, self.options.tmpdir, ["-debug"]))
+        
+    def run_test(self):
+        print "Mine 4 blocks on Node 0"
+        self.nodes[0].setgenerate(True, 4)
+        assert(self.nodes[0].getblockcount() == 4)
+        besthash = self.nodes[0].getbestblockhash()
+
+        print "Mine competing 6 blocks on Node 1"
+        self.nodes[1].setgenerate(True, 6)
+        assert(self.nodes[1].getblockcount() == 6)
+
+        print "Connect nodes to force a reorg"
+        connect_nodes_bi(self.nodes,0,1)
+        sync_blocks(self.nodes)
+        assert(self.nodes[0].getblockcount() == 6)
+        badhash = self.nodes[1].getblockhash(2)
+
+        print "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))
+
+if __name__ == '__main__':
+    InvalidateTest().main()