refactor code

Change-Id: Ia2bc49ed8742d79000fd59f7e95fa9b957573c54
diff --git a/tests/core/merkle-tree.t.cpp b/tests/core/merkle-tree.t.cpp
new file mode 100644
index 0000000..278d3d2
--- /dev/null
+++ b/tests/core/merkle-tree.t.cpp
@@ -0,0 +1,249 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014,  Regents of the University of California
+ *
+ * This file is part of NSL (NDN Signature Logger).
+ * See AUTHORS.md for complete list of NSL authors and contributors.
+ *
+ * NSL is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NSL is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NSL, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of nsl authors and contributors.
+ */
+
+#include "merkle-tree.hpp"
+#include "../tree-generator.hpp"
+#include "db-fixture.hpp"
+
+#include <boost/mpl/list.hpp>
+#include "boost-test.hpp"
+
+namespace nsl {
+namespace tests {
+
+BOOST_FIXTURE_TEST_SUITE(TestMerkleTree, DbFixture)
+
+BOOST_AUTO_TEST_CASE(Basic)
+{
+  MerkleTree merkleTree(TreeGenerator::LOGGER_NAME, db);
+  BOOST_CHECK_EQUAL(merkleTree.getNextLeafSeqNo(), 0);
+  BOOST_CHECK(merkleTree.getRootHash() == nullptr);
+}
+
+template<NonNegativeInteger N, size_t L>
+struct MerkleTreeTestParam
+{
+  const NonNegativeInteger leafNo = N;
+  const size_t rootLevel = L;
+};
+
+typedef boost::mpl::list<MerkleTreeTestParam<5, 3>,
+                         MerkleTreeTestParam<32, 5>,
+                         MerkleTreeTestParam<33, 6>,
+                         MerkleTreeTestParam<1024, 10>,
+                         MerkleTreeTestParam<1025, 11>> AddLeafTestParams;
+
+BOOST_AUTO_TEST_CASE_TEMPLATE(AddLeaf, T, AddLeafTestParams)
+{
+  T param;
+
+  NonNegativeInteger leafNo = param.leafNo;
+  size_t rootLevel = param.rootLevel;
+
+  MerkleTree merkleTree(TreeGenerator::LOGGER_NAME, db);
+  for (NonNegativeInteger i = 0; i < leafNo ; i++) {
+    BOOST_REQUIRE(merkleTree.addLeaf(i, Node::getEmptyHash()));
+  }
+
+  auto hash1 = TreeGenerator::getHash(Node::Index(0, rootLevel), leafNo);
+  auto hash2 = merkleTree.getRootHash();
+
+  BOOST_REQUIRE(hash1 != nullptr);
+  BOOST_REQUIRE(hash2 != nullptr);
+
+  BOOST_CHECK_EQUAL_COLLECTIONS(hash1->begin(), hash1->end(), hash2->begin(), hash2->end());
+}
+
+class MerkleTreeLoadTestParam1
+{
+public:
+  void
+  insertData(Db& db)
+  {
+    // partial first sub-tree
+    auto subtree1 = TreeGenerator::getSubTreeBinary(Node::Index(0, 5), 5);
+    db.insertSubTreeData(5, 0, *subtree1->encode(), false, 5);
+  }
+
+  const NonNegativeInteger seqNo = 0;
+  const size_t level = 3;
+  const NonNegativeInteger nextLeafSeqNo = 5;
+};
+
+class MerkleTreeLoadTestParam2
+{
+public:
+  void
+  insertData(Db& db)
+  {
+    // full first sub-tree
+    auto subtree1 = TreeGenerator::getSubTreeBinary(Node::Index(0, 5), 32);
+    auto subtree1Data = subtree1->encode();
+    db.insertSubTreeData(5, 0, *subtree1Data);
+
+    auto subtree2 = TreeGenerator::getSubTreeBinary(Node::Index(0, 10), 32);
+    auto subtree2Data = subtree2->encode();
+    db.insertSubTreeData(10, 0, *subtree2Data, false, 32);
+
+    auto subtree3 = make_shared<SubTreeBinary>(TreeGenerator::LOGGER_NAME,
+                                               Node::Index(32, 5),
+                                               [&] (const Node::Index&) {},
+                                               [&] (const Node::Index&,
+                                                    const NonNegativeInteger&,
+                                                    ndn::ConstBufferPtr) {});
+    auto subtree3Data = subtree3->encode();
+
+    db.insertSubTreeData(5, 32, *subtree3Data, false, 32);
+  }
+
+  const NonNegativeInteger seqNo = 0;
+  const size_t level = 5;
+  const NonNegativeInteger nextLeafSeqNo = 32;
+};
+
+class MerkleTreeLoadTestParam3
+{
+public:
+  void
+  insertData(Db& db)
+  {
+    auto subtree1 = TreeGenerator::getSubTreeBinary(Node::Index(0, 15), 1025);
+    auto subtree1Data = subtree1->encode();
+    db.insertSubTreeData(15, 0, *subtree1Data, false, 1025);
+
+    auto subtree2 = TreeGenerator::getSubTreeBinary(Node::Index(1024, 10), 1025);
+    auto subtree2Data = subtree2->encode();
+    db.insertSubTreeData(10, 1024, *subtree2Data, false, 1025);
+
+    auto subtree3 = TreeGenerator::getSubTreeBinary(Node::Index(1024, 5), 1025);
+    auto subtree3Data = subtree3->encode();
+    db.insertSubTreeData(5, 1024, *subtree3Data, false, 1025);
+  }
+
+  const NonNegativeInteger seqNo = 0;
+  const size_t level = 11;
+  const NonNegativeInteger nextLeafSeqNo = 1025;
+};
+
+
+typedef boost::mpl::list<MerkleTreeLoadTestParam1,
+                         MerkleTreeLoadTestParam2,
+                         MerkleTreeLoadTestParam3> DbLoadTestParams;
+
+BOOST_AUTO_TEST_CASE_TEMPLATE(DbLoad, T, DbLoadTestParams)
+{
+  T param;
+
+  param.insertData(db);
+
+  MerkleTree merkleTree(TreeGenerator::LOGGER_NAME, db);
+
+  auto hash1 = TreeGenerator::getHash(Node::Index(param.seqNo, param.level), param.nextLeafSeqNo);
+  auto hash2 = merkleTree.getRootHash();
+
+  BOOST_REQUIRE(hash1 != nullptr);
+  BOOST_REQUIRE(hash2 != nullptr);
+
+  BOOST_CHECK_EQUAL_COLLECTIONS(hash1->begin(), hash1->end(), hash2->begin(), hash2->end());
+}
+
+BOOST_AUTO_TEST_CASE(DbSave1)
+{
+  MerkleTree merkleTree(TreeGenerator::LOGGER_NAME, db);
+  for (NonNegativeInteger i = 0; i < 5 ; i++) {
+    BOOST_REQUIRE(merkleTree.addLeaf(i, Node::getEmptyHash()));
+  }
+
+  merkleTree.savePendingTree();
+  auto data1 = db.getPendingSubTrees()[0];
+  auto data2 = TreeGenerator::getSubTreeBinary(Node::Index(0, 5), 5)->encode();
+
+  BOOST_CHECK(data1->wireEncode() == data2->wireEncode());
+}
+
+BOOST_AUTO_TEST_CASE(DbSave2)
+{
+  MerkleTree merkleTree(TreeGenerator::LOGGER_NAME, db);
+  for (NonNegativeInteger i = 0; i < 32 ; i++) {
+    BOOST_REQUIRE(merkleTree.addLeaf(i, Node::getEmptyHash()));
+  }
+
+  merkleTree.savePendingTree();
+  auto data1 = db.getPendingSubTrees()[0];
+  auto data2 = TreeGenerator::getSubTreeBinary(Node::Index(0, 10), 32)->encode();
+
+  auto data3 = db.getPendingSubTrees()[1];
+  auto subtree = make_shared<SubTreeBinary>(TreeGenerator::LOGGER_NAME,
+                                            Node::Index(32, 5),
+                                            [&] (const Node::Index&) {},
+                                            [&] (const Node::Index&,
+                                                 const NonNegativeInteger&,
+                                                 ndn::ConstBufferPtr) {});
+  auto data4 = subtree->encode();
+
+  BOOST_CHECK(data1->wireEncode() == data2->wireEncode());
+  BOOST_CHECK(data3->wireEncode() == data4->wireEncode());
+
+  auto dataA = TreeGenerator::getSubTreeBinary(Node::Index(0, 5), 32)->encode();
+  auto dataB = db.getSubTreeData(5, 0);
+
+  BOOST_CHECK(dataA->wireEncode() == dataB->wireEncode());
+}
+
+BOOST_AUTO_TEST_CASE(DbSave3)
+{
+  MerkleTree merkleTree(TreeGenerator::LOGGER_NAME, db);
+  for (NonNegativeInteger i = 0; i < 1025 ; i++) {
+    BOOST_REQUIRE(merkleTree.addLeaf(i, Node::getEmptyHash()));
+  }
+
+  merkleTree.savePendingTree();
+
+  auto data1 = db.getPendingSubTrees()[0];
+  auto data2 = TreeGenerator::getSubTreeBinary(Node::Index(0, 15), 1025)->encode();
+
+  auto data3 = db.getPendingSubTrees()[1];
+  auto data4 = TreeGenerator::getSubTreeBinary(Node::Index(1024, 10), 1025)->encode();
+
+  auto data5 = db.getPendingSubTrees()[2];
+  auto data6 = TreeGenerator::getSubTreeBinary(Node::Index(1024, 5), 1025)->encode();
+
+  BOOST_CHECK(data1->wireEncode() == data2->wireEncode());
+  BOOST_CHECK(data3->wireEncode() == data4->wireEncode());
+  BOOST_CHECK(data5->wireEncode() == data6->wireEncode());
+
+  for (NonNegativeInteger i = 0; i < 1024 ; i += 32) {
+    auto dataA = TreeGenerator::getSubTreeBinary(Node::Index(i, 5), i + 32)->encode();
+    auto dataB = db.getSubTreeData(5, i);
+
+    BOOST_CHECK(dataA->wireEncode() == dataB->wireEncode());
+  }
+
+  auto dataA = TreeGenerator::getSubTreeBinary(Node::Index(0, 10), 1024)->encode();
+  auto dataB = db.getSubTreeData(10, 0);
+
+  BOOST_CHECK(dataA->wireEncode() == dataB->wireEncode());
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+} // namespace tests
+} // namespace nsl