diff --git a/AdventOfCode2024/Program.cpp b/AdventOfCode2024/Program.cpp
index 642ad5a..83908da 100644
--- a/AdventOfCode2024/Program.cpp
+++ b/AdventOfCode2024/Program.cpp
@@ -22,14 +22,14 @@
 
 void Program::run()
 {
-    std::cout << "### Advent of Code 2023 ###\n";
+    std::cout << "### Advent of Code 2024 ###\n";
     runSolvers();
 }
 
 void Program::runSolvers()
 {
     SolverEngine solverEngine{ getInputPaths() };
-    solverEngine.run(std::make_unique<Demo>());
+    solverEngine.run(*std::make_unique<Demo>());
 }
 
 std::vector<std::string> Program::getInputPaths() const
diff --git a/AdventOfCode2024/SolverEngine.cpp b/AdventOfCode2024/SolverEngine.cpp
index 1940e4f..72314d8 100644
--- a/AdventOfCode2024/SolverEngine.cpp
+++ b/AdventOfCode2024/SolverEngine.cpp
@@ -21,25 +21,25 @@
 SolverEngine::SolverEngine(const std::vector<std::string>& inputPaths)
     : inputPaths_{ inputPaths } {}
 
-void SolverEngine::run(const std::unique_ptr<Solver> solver)
+void SolverEngine::run(Solver& solver)
 {
-    std::cout << "\n--- " << solver->getPuzzleName() << " ---\n";
+    std::cout << "\n--- " << solver.getPuzzleName() << " ---\n";
 
-    auto fullFilePath = tryGetValidFullInputFilePath(solver->getInputFileName());
+    auto fullFilePath = tryGetValidFullInputFilePath(solver.getInputFileName());
     if (fullFilePath != "")
     {
         std::string line;
         std::ifstream inputFile{ fullFilePath };
         while (std::getline(inputFile, line))
         {
-            solver->processDataLine(line);
+            solver.processDataLine(line);
         }
         inputFile.close();
 
-        solver->finish();
+        solver.finish();
 
-        std::cout << "Part 1: " << solver->getResultPart1()
-            << "\nPart 2: " << solver->getResultPart2() << std::endl;
+        std::cout << "Part 1: " << solver.getResultPart1()
+            << "\nPart 2: " << solver.getResultPart2() << std::endl;
     }
 }
 
diff --git a/AdventOfCode2024/SolverEngine.h b/AdventOfCode2024/SolverEngine.h
index 854733a..b3a1eaf 100644
--- a/AdventOfCode2024/SolverEngine.h
+++ b/AdventOfCode2024/SolverEngine.h
@@ -26,7 +26,7 @@ class SolverEngine
 {
 public:
     SolverEngine(const std::vector<std::string>& inputPaths);
-    void run(const std::unique_ptr<Solver> solver);
+    void run(Solver& solver);
 private:
     std::vector<std::string> inputPaths_;
     std::filesystem::path tryGetValidFullInputFilePath(const std::string& inputFileName);
diff --git a/AdventOfCode2024/UnitTests/UnitTests.cpp b/AdventOfCode2024/UnitTests/UnitTests.cpp
index 7c0e4c4..2be975a 100644
--- a/AdventOfCode2024/UnitTests/UnitTests.cpp
+++ b/AdventOfCode2024/UnitTests/UnitTests.cpp
@@ -1,22 +1,79 @@
+// Solutions to the Advent Of Code 2024.
+// Copyright (C) 2024  Stefan Müller
+//
+// This program 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.
+//
+// This program 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
+// this program.  If not, see <http://www.gnu.org/licenses/>.
+
 #include "pch.h"
 #include "CppUnitTest.h"
 
+#include "../Demo.h"
+#include "../Solver.h"
+#include "../SolverEngine.h"
+
 using namespace Microsoft::VisualStudio::CppUnitTestFramework;
 
 namespace UnitTests
 {
-    TEST_CLASS(UnitTests)
+    TEST_CLASS(DemoTests)
     {
     public:
-
-        TEST_METHOD(TestMethod1)
+        TEST_METHOD(FullData1)
         {
-            Assert::Fail();
+            SolverEngine solverEngine{ getInputPaths() };
+            std::unique_ptr<Solver> solver{ std::make_unique<Demo>() };
+            solverEngine.run(*solver);
+            assertAreEqual(66, solver->getResultPart1());
         }
 
-        TEST_METHOD(TestMethod2)
+        TEST_METHOD(FullData2)
         {
-            Assert::AreEqual(1, 1);
+            SolverEngine solverEngine{ getInputPaths() };
+            std::unique_ptr<Solver> solver = std::make_unique<Demo>();
+            solverEngine.run(*solver);
+            assertAreEqual(39916800, solver->getResultPart2());
+        }
+
+        TEST_METHOD(ExampleData1)
+        {
+            SolverEngine solverEngine{ getExampleInputPaths() };
+            std::unique_ptr<Solver> solver = std::make_unique<Demo>();
+            solverEngine.run(*solver);
+            assertAreEqual(10, solver->getResultPart1());
+        }
+
+        TEST_METHOD(ExampleData2)
+        {
+            SolverEngine solverEngine{ getExampleInputPaths() };
+            std::unique_ptr<Solver> solver = std::make_unique<Demo>();
+            solverEngine.run(*solver);
+            assertAreEqual(24, solver->getResultPart2());
+        }
+
+    private:
+        std::vector<std::string> getInputPaths() const
+        {
+            return std::vector<std::string>{ "../../data", "../../../../data" };
+        }
+
+        std::vector<std::string> getExampleInputPaths() const
+        {
+            return std::vector<std::string>{ "../../data/examples", "../../../../data/examples" };
+        }
+
+        void assertAreEqual(const long long int expected, const long long int actual) const
+        {
+            std::wstring message = L"Expected: <" + std::to_wstring(expected) + L"> Actual: <" + std::to_wstring(actual) + L">";
+            Assert::IsTrue(expected == actual, message.c_str());
         }
     };
 }
diff --git a/AdventOfCode2024/UnitTests/UnitTests.vcxproj b/AdventOfCode2024/UnitTests/UnitTests.vcxproj
index 46d085c..e11dda1 100644
--- a/AdventOfCode2024/UnitTests/UnitTests.vcxproj
+++ b/AdventOfCode2024/UnitTests/UnitTests.vcxproj
@@ -77,6 +77,7 @@
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <LinkIncremental>true</LinkIncremental>
+    <IncludePath>..;$(IncludePath)</IncludePath>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <LinkIncremental>true</LinkIncremental>
@@ -96,10 +97,12 @@
       <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <UseFullPaths>true</UseFullPaths>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
-      <AdditionalLibraryDirectories>$(VCInstallDir)UnitTest\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>$(VCInstallDir)UnitTest\lib;..\$(Platform)\$(Configuration);D:\Projects\VS\AdventOfCode2024Full\code\AdventOfCode2024\x64\Debug;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>Demo.obj;Solver.obj;SolverEngine.obj;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">