Add tests for CMerkleBlock usage with txids specified

src/Makefile.test.include

@@ -49,6 +49,7 @@ BITCOIN_TESTS =\
   test/main_tests.cpp \
   test/mempool_tests.cpp \
   test/merkle_tests.cpp \
+  test/merkleblock_tests.cpp \
   test/miner_tests.cpp \
   test/multisig_tests.cpp \
   test/net_tests.cpp \

src/test/merkleblock_tests.cpp

@@ -0,0 +1,78 @@
+// Copyright (c) 2012-2017 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "merkleblock.h"
+#include "uint256.h"
+#include "test/test_bitcoin.h"
+
+#include <boost/test/unit_test.hpp>
+
+
+BOOST_FIXTURE_TEST_SUITE(merkleblock_tests, BasicTestingSetup)
+
+/**
+ * Create a CMerkleBlock using a list of txids which will be found in the
+ * given block.
+ */
+BOOST_AUTO_TEST_CASE(merkleblock_construct_from_txids_found)
+{
+    CBlock block = getBlock13b8a();
+
+    std::set<uint256> txids;
+
+    // Last txn in block.
+    uint256 txhash1 = uint256S("0x74d681e0e03bafa802c8aa084379aa98d9fcd632ddc2ed9782b586ec87451f20");
+
+    // Second txn in block.
+    uint256 txhash2 = uint256S("0xf9fc751cb7dc372406a9f8d738d5e6f8f63bab71986a39cf36ee70ee17036d07");
+
+    txids.insert(txhash1);
+    txids.insert(txhash2);
+
+    CMerkleBlock merkleBlock(block, txids);
+
+    BOOST_CHECK_EQUAL(merkleBlock.header.GetHash().GetHex(), block.GetHash().GetHex());
+
+    // vMatchedTxn is only used when bloom filter is specified.
+    BOOST_CHECK_EQUAL(merkleBlock.vMatchedTxn.size(), 0);
+
+    std::vector<uint256> vMatched;
+    std::vector<unsigned int> vIndex;
+
+    BOOST_CHECK_EQUAL(merkleBlock.txn.ExtractMatches(vMatched, vIndex).GetHex(), block.hashMerkleRoot.GetHex());
+    BOOST_CHECK_EQUAL(vMatched.size(), 2);
+
+    // Ordered by occurrence in depth-first tree traversal.
+    BOOST_CHECK_EQUAL(vMatched[0].ToString(), txhash2.ToString());
+    BOOST_CHECK_EQUAL(vIndex[0], 1);
+
+    BOOST_CHECK_EQUAL(vMatched[1].ToString(), txhash1.ToString());
+    BOOST_CHECK_EQUAL(vIndex[1], 8);
+}
+
+
+/**
+ * Create a CMerkleBlock using a list of txids which will not be found in the
+ * given block.
+ */
+BOOST_AUTO_TEST_CASE(merkleblock_construct_from_txids_not_found)
+{
+    CBlock block = getBlock13b8a();
+
+    std::set<uint256> txids2;
+    txids2.insert(uint256S("0xc0ffee00003bafa802c8aa084379aa98d9fcd632ddc2ed9782b586ec87451f20"));
+    CMerkleBlock merkleBlock(block, txids2);
+
+    BOOST_CHECK_EQUAL(merkleBlock.header.GetHash().GetHex(), block.GetHash().GetHex());
+    BOOST_CHECK_EQUAL(merkleBlock.vMatchedTxn.size(), 0);
+
+    std::vector<uint256> vMatched;
+    std::vector<unsigned int> vIndex;
+
+    BOOST_CHECK_EQUAL(merkleBlock.txn.ExtractMatches(vMatched, vIndex).GetHex(), block.hashMerkleRoot.GetHex());
+    BOOST_CHECK_EQUAL(vMatched.size(), 0);
+    BOOST_CHECK_EQUAL(vIndex.size(), 0);
+}
+
+BOOST_AUTO_TEST_SUITE_END()

src/test/test_bitcoin.h

@@ -110,4 +110,7 @@ struct TestMemPoolEntryHelper
     TestMemPoolEntryHelper &SpendsCoinbase(bool _flag) { spendsCoinbase = _flag; return *this; }
     TestMemPoolEntryHelper &SigOpsCost(unsigned int _sigopsCost) { sigOpCost = _sigopsCost; return *this; }
 };
+
+CBlock getBlock13b8a();
+
 #endif