@@ -1,14 +1,24 @@
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.20)
 project(astar-algorithm-cpp)
 
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
-# Header-only library interface (optional but good practice)
+include(FetchContent)
+FetchContent_Declare(
+    doctest
+    URL https://raw.githubusercontent.com/doctest/doctest/v2.4.11/doctest/doctest.h
+    DOWNLOAD_NO_EXTRACT TRUE
+)
+FetchContent_MakeAvailable(doctest)
+
+add_library(doctest INTERFACE)
+target_include_directories(doctest INTERFACE ${doctest_SOURCE_DIR})
+
+# Header-only library interface
 add_library(stlastar INTERFACE)
 target_include_directories(stlastar INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
 
-# Executables
 add_executable(8puzzle 8puzzle.cpp)
 target_link_libraries(8puzzle stlastar)
 
@@ -18,8 +28,10 @@ target_link_libraries(findpath stlastar)
 add_executable(minpathbucharest min_path_to_Bucharest.cpp)
 target_link_libraries(minpathbucharest stlastar)
 
-# Tests
 enable_testing()
 add_executable(tests tests.cpp)
-target_link_libraries(tests stlastar)
+
+target_link_libraries(tests stlastar doctest)
+
+# Register with CTest so you can run 'ctest' in the build folder
 add_test(NAME tests COMMAND tests)
@@ -1,5 +1,13 @@
 // A unit test suite
 
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include "doctest.h"
+#include "stlastar.h" // Assuming this is your header
+
+TEST_CASE("Test A* Basic Functionality") {
+    // Your test logic here
+    CHECK(1 + 1 == 2);
+}
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -159,7 +167,7 @@ size_t MapSearchNode::Hash() {
     return h1 ^ (h2 << 1);
 }
 
-int main(int argc, char* argv[]) {
+int main2(int argc, char* argv[]) {
     AStarSearch<MapSearchNode> astarsearch;
 
     unsigned int SearchCount = 0;