diff --git a/tests/route/test-link-state-calculator.cpp b/tests/route/test-link-state-calculator.cpp
new file mode 100644
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+++ b/tests/route/test-link-state-calculator.cpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2014-2020,  The University of Memphis,
+ *                           Regents of the University of California,
+ *                           Arizona Board of Regents.
+ *
+ * This file is part of NLSR (Named-data Link State Routing).
+ * See AUTHORS.md for complete list of NLSR authors and contributors.
+ *
+ * NLSR 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.
+ *
+ * NLSR 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
+ * NLSR, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "route/routing-table-calculator.hpp"
+
+#include "adjacency-list.hpp"
+#include "lsdb.hpp"
+#include "nlsr.hpp"
+#include "../test-common.hpp"
+#include "route/map.hpp"
+#include "route/routing-table.hpp"
+#include "adjacent.hpp"
+
+#include <ndn-cxx/util/dummy-client-face.hpp>
+
+namespace nlsr {
+namespace test {
+
+static const ndn::time::system_clock::TimePoint MAX_TIME =
+  ndn::time::system_clock::TimePoint::max();
+
+class LinkStateCalculatorFixture : public BaseFixture
+{
+public:
+  LinkStateCalculatorFixture()
+    : face(m_ioService, m_keyChain)
+    , conf(face, m_keyChain)
+    , confProcessor(conf)
+    , nlsr(face, m_keyChain, conf)
+    , routingTable(nlsr.m_routingTable)
+    , lsdb(nlsr.m_lsdb)
+  {
+    setUpTopology();
+  }
+
+  // Triangle topology with routers A, B, C connected
+  void setUpTopology()
+  {
+    Adjacent a(ROUTER_A_NAME, ndn::FaceUri(ROUTER_A_FACE), 0, Adjacent::STATUS_ACTIVE, 0, 0);
+    Adjacent b(ROUTER_B_NAME, ndn::FaceUri(ROUTER_B_FACE), 0, Adjacent::STATUS_ACTIVE, 0, 0);
+    Adjacent c(ROUTER_C_NAME, ndn::FaceUri(ROUTER_C_FACE), 0, Adjacent::STATUS_ACTIVE, 0, 0);
+
+    // Router A
+    b.setLinkCost(LINK_AB_COST);
+    c.setLinkCost(LINK_AC_COST);
+
+    AdjacencyList& adjacencyListA = conf.getAdjacencyList();
+    adjacencyListA.insert(b);
+    adjacencyListA.insert(c);
+
+    AdjLsa adjA(a.getName(), 1, MAX_TIME, 2, adjacencyListA);
+    lsdb.installAdjLsa(adjA);
+
+    // Router B
+    a.setLinkCost(LINK_AB_COST);
+    c.setLinkCost(LINK_BC_COST);
+
+    AdjacencyList adjacencyListB;
+    adjacencyListB.insert(a);
+    adjacencyListB.insert(c);
+
+    AdjLsa adjB(b.getName(), 1, MAX_TIME, 2, adjacencyListB);
+    lsdb.installAdjLsa(adjB);
+
+    // Router C
+    a.setLinkCost(LINK_AC_COST);
+    b.setLinkCost(LINK_BC_COST);
+
+    AdjacencyList adjacencyListC;
+    adjacencyListC.insert(a);
+    adjacencyListC.insert(b);
+
+    AdjLsa adjC(c.getName(), 1, MAX_TIME, 2, adjacencyListC);
+    lsdb.installAdjLsa(adjC);
+
+    map.createFromAdjLsdb(lsdb.getAdjLsdb().begin(), lsdb.getAdjLsdb().end());
+  }
+
+public:
+  ndn::util::DummyClientFace face;
+  ConfParameter conf;
+  DummyConfFileProcessor confProcessor;
+  Nlsr nlsr;
+  Map map;
+
+  RoutingTable& routingTable;
+  Lsdb& lsdb;
+
+  static const ndn::Name ROUTER_A_NAME;
+  static const ndn::Name ROUTER_B_NAME;
+  static const ndn::Name ROUTER_C_NAME;
+
+  static const std::string ROUTER_A_FACE;
+  static const std::string ROUTER_B_FACE;
+  static const std::string ROUTER_C_FACE;
+
+  static const double LINK_AB_COST;
+  static const double LINK_AC_COST;
+  static const double LINK_BC_COST;
+};
+
+const ndn::Name LinkStateCalculatorFixture::ROUTER_A_NAME = "/ndn/site/%C1.Router/this-router";
+const ndn::Name LinkStateCalculatorFixture::ROUTER_B_NAME = "/ndn/site/%C1.Router/b";
+const ndn::Name LinkStateCalculatorFixture::ROUTER_C_NAME = "/ndn/site/%C1.Router/c";
+
+const std::string LinkStateCalculatorFixture::ROUTER_A_FACE = "udp4://10.0.0.1";
+const std::string LinkStateCalculatorFixture::ROUTER_B_FACE = "udp4://10.0.0.2";
+const std::string LinkStateCalculatorFixture::ROUTER_C_FACE = "udp4://10.0.0.3";
+
+const double LinkStateCalculatorFixture::LINK_AB_COST = 5;
+const double LinkStateCalculatorFixture::LINK_AC_COST = 10;
+const double LinkStateCalculatorFixture::LINK_BC_COST = 17;
+
+BOOST_FIXTURE_TEST_SUITE(TestLinkStateRoutingCalculator, LinkStateCalculatorFixture)
+
+BOOST_AUTO_TEST_CASE(Basic)
+{
+  LinkStateRoutingTableCalculator calculator(map.getMapSize());
+  calculator.calculatePath(map, routingTable, conf, lsdb.getAdjLsdb());
+
+  RoutingTableEntry* entryB = routingTable.findRoutingTableEntry(ROUTER_B_NAME);
+  BOOST_REQUIRE(entryB != nullptr);
+
+  // Router A should be able to get to B through B and to B through C
+  NexthopList& bHopList = entryB->getNexthopList();
+  BOOST_REQUIRE_EQUAL(bHopList.getNextHops().size(), 2);
+
+  for (const NextHop& hop : bHopList) {
+    std::string faceUri = hop.getConnectingFaceUri();
+    uint64_t cost = hop.getRouteCostAsAdjustedInteger();
+
+    BOOST_CHECK((faceUri == ROUTER_B_FACE && cost == LINK_AB_COST) ||
+                (faceUri == ROUTER_C_FACE && cost == LINK_AC_COST + LINK_BC_COST));
+
+  }
+
+  RoutingTableEntry* entryC = routingTable.findRoutingTableEntry(ROUTER_C_NAME);
+  BOOST_REQUIRE(entryC != nullptr);
+
+  // Router A should be able to get to C through C and to C through B
+  NexthopList& cHopList = entryC->getNexthopList();
+  BOOST_REQUIRE_EQUAL(cHopList.getNextHops().size(), 2);
+
+  for (const NextHop& hop : cHopList) {
+    std::string faceUri = hop.getConnectingFaceUri();
+    uint64_t cost = hop.getRouteCostAsAdjustedInteger();
+
+    BOOST_CHECK((faceUri == ROUTER_C_FACE && cost == LINK_AC_COST) ||
+                (faceUri == ROUTER_B_FACE && cost == LINK_AB_COST + LINK_BC_COST));
+  }
+}
+
+BOOST_AUTO_TEST_CASE(Asymmetric)
+{
+  // Asymmetric link cost between B and C
+  ndn::Name key = ndn::Name(ROUTER_B_NAME).append(boost::lexical_cast<std::string>(Lsa::Type::ADJACENCY));
+  AdjLsa* lsa = nlsr.m_lsdb.findAdjLsa(key);
+  BOOST_REQUIRE(lsa != nullptr);
+
+  auto c = lsa->m_adl.findAdjacent(ROUTER_C_NAME);
+  BOOST_REQUIRE(c != conf.getAdjacencyList().end());
+
+  double higherLinkCost = LINK_BC_COST + 1;
+  c->setLinkCost(higherLinkCost);
+
+  // Calculation should consider the link between B and C as having cost = higherLinkCost
+  LinkStateRoutingTableCalculator calculator(map.getMapSize());
+  calculator.calculatePath(map, routingTable, conf, lsdb.getAdjLsdb());
+
+  RoutingTableEntry* entryB = routingTable.findRoutingTableEntry(ROUTER_B_NAME);
+  BOOST_REQUIRE(entryB != nullptr);
+
+  // Router A should be able to get to B through B and to B through C
+  NexthopList& bHopList = entryB->getNexthopList();
+  BOOST_REQUIRE_EQUAL(bHopList.getNextHops().size(), 2);
+
+  for (const NextHop& hop : bHopList) {
+    std::string faceUri = hop.getConnectingFaceUri();
+    uint64_t cost = hop.getRouteCostAsAdjustedInteger();
+
+    BOOST_CHECK((faceUri == ROUTER_B_FACE && cost == LINK_AB_COST) ||
+                (faceUri == ROUTER_C_FACE && cost == LINK_AC_COST + higherLinkCost));
+
+  }
+
+  RoutingTableEntry* entryC = routingTable.findRoutingTableEntry(ROUTER_C_NAME);
+  BOOST_REQUIRE(entryC != nullptr);
+
+  // Router A should be able to get to C through C and to C through B
+  NexthopList& cHopList = entryC->getNexthopList();
+  BOOST_REQUIRE_EQUAL(cHopList.getNextHops().size(), 2);
+
+  for (const NextHop& hop : cHopList) {
+    std::string faceUri = hop.getConnectingFaceUri();
+    uint64_t cost = hop.getRouteCostAsAdjustedInteger();
+
+    BOOST_CHECK((faceUri == ROUTER_C_FACE && cost == LINK_AC_COST) ||
+                (faceUri == ROUTER_B_FACE && cost == LINK_AB_COST + higherLinkCost));
+  }
+}
+
+BOOST_AUTO_TEST_CASE(NonAdjacentCost)
+{
+  // Asymmetric link cost between B and C
+  ndn::Name key = ndn::Name(ROUTER_B_NAME).append(boost::lexical_cast<std::string>(Lsa::Type::ADJACENCY));
+  auto lsa = nlsr.m_lsdb.findAdjLsa(key);
+  BOOST_REQUIRE(lsa != nullptr);
+
+  auto c = lsa->m_adl.findAdjacent(ROUTER_C_NAME);
+  BOOST_REQUIRE(c != conf.getAdjacencyList().end());
+
+  // Break the link between B - C by setting it to a NON_ADJACENT_COST.
+  c->setLinkCost(Adjacent::NON_ADJACENT_COST);
+
+  // Calculation should consider the link between B and C as down
+  LinkStateRoutingTableCalculator calculator(map.getMapSize());
+  calculator.calculatePath(map, routingTable, conf, lsdb.getAdjLsdb());
+
+  // Router A should be able to get to B through B but not through C
+  RoutingTableEntry* entryB = routingTable.findRoutingTableEntry(ROUTER_B_NAME);
+  BOOST_REQUIRE(entryB != nullptr);
+
+  auto bHopList = entryB->getNexthopList();
+  BOOST_REQUIRE_EQUAL(bHopList.getNextHops().size(), 1);
+
+  const auto nextHopForB = bHopList.getNextHops().begin();
+
+  BOOST_CHECK(nextHopForB->getConnectingFaceUri() == ROUTER_B_FACE &&
+              nextHopForB->getRouteCostAsAdjustedInteger() == LINK_AB_COST);
+
+  // Router A should be able to get to C through C but not through B
+  auto entryC = routingTable.findRoutingTableEntry(ROUTER_C_NAME);
+  BOOST_REQUIRE(entryC != nullptr);
+
+  NexthopList& cHopList = entryC->getNexthopList();
+  BOOST_REQUIRE_EQUAL(cHopList.getNextHops().size(), 1);
+
+  const auto nextHopForC = cHopList.getNextHops().begin();
+
+  BOOST_CHECK(nextHopForC->getConnectingFaceUri() == ROUTER_C_FACE &&
+              nextHopForC->getRouteCostAsAdjustedInteger() == LINK_AC_COST);
+}
+
+BOOST_AUTO_TEST_CASE(AsymmetricZeroCostLink)
+{
+  // Asymmetric and zero link cost between B - C, and B - A.
+  ndn::Name keyB = ndn::Name(ROUTER_B_NAME).append(boost::lexical_cast<std::string>(Lsa::Type::ADJACENCY));
+  auto lsaB = nlsr.m_lsdb.findAdjLsa(keyB);
+  BOOST_REQUIRE(lsaB != nullptr);
+
+  auto c = lsaB->m_adl.findAdjacent(ROUTER_C_NAME);
+  BOOST_REQUIRE(c != conf.getAdjacencyList().end());
+  // Re-adjust link cost to 0 from B-C. However, this should not set B-C cost 0 because C-B
+  // cost is greater that 0 i.e. 17
+  c->setLinkCost(0);
+
+  auto a = lsaB->m_adl.findAdjacent(ROUTER_A_NAME);
+  BOOST_REQUIRE(a != conf.getAdjacencyList().end());
+
+  ndn::Name keyA = ndn::Name(ROUTER_A_NAME).append(boost::lexical_cast<std::string>(Lsa::Type::ADJACENCY));
+  auto lsaA = nlsr.m_lsdb.findAdjLsa(keyA);
+  BOOST_REQUIRE(lsaA != nullptr);
+
+  auto b = lsaA->m_adl.findAdjacent(ROUTER_B_NAME);
+  BOOST_REQUIRE(b != conf.getAdjacencyList().end());
+
+  // Re-adjust link cost to 0 from both the direction i.e B-A and A-B
+  a->setLinkCost(0);
+  b->setLinkCost(0);
+
+  // Calculation should consider 0 link-cost between B and C
+  LinkStateRoutingTableCalculator calculator(map.getMapSize());
+  calculator.calculatePath(map, routingTable, conf, lsdb.getAdjLsdb());
+
+  // Router A should be able to get to B through B and C
+  RoutingTableEntry* entryB = routingTable.findRoutingTableEntry(ROUTER_B_NAME);
+  BOOST_REQUIRE(entryB != nullptr);
+
+  // Node can have neighbors with zero cost, so the nexthop count should be 2
+  NexthopList& bHopList = entryB->getNexthopList();
+  BOOST_REQUIRE_EQUAL(bHopList.getNextHops().size(), 2);
+
+  const auto nextHopForB = bHopList.getNextHops().begin();
+  // Check if the next hop via B is through A or not after the cost adjustment
+  BOOST_CHECK(nextHopForB->getConnectingFaceUri() == ROUTER_B_FACE &&
+              nextHopForB->getRouteCostAsAdjustedInteger() == 0);
+
+  // Router A should be able to get to C through C and B
+  auto entryC = routingTable.findRoutingTableEntry(ROUTER_C_NAME);
+  BOOST_REQUIRE(entryC != nullptr);
+
+  NexthopList& cHopList = entryC->getNexthopList();
+  BOOST_REQUIRE_EQUAL(cHopList.getNextHops().size(), 2);
+
+  const auto nextHopForC = cHopList.getNextHops().begin();
+  // Check if the nextHop from C is via A or not
+  BOOST_CHECK(nextHopForC->getConnectingFaceUri() == ROUTER_C_FACE &&
+              nextHopForC->getRouteCostAsAdjustedInteger() == LINK_AC_COST);
+
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+} // namespace test
+} // namespace nlsr