Added tests for CoreMask transformations.

Tests/Common++Test/CMakeLists.txt

@@ -24,7 +24,8 @@ add_executable(
   Tests/LoggerTests.cpp
   Tests/LRUListTests.cpp
   Tests/MacAddressTests.cpp
-  Tests/PointerVectorTests.cpp)
+  Tests/PointerVectorTests.cpp
+  Tests/SystemUtilsTests.cpp)
 
 target_link_libraries(
   Common++Test

Tests/Common++Test/Tests/SystemUtilsTests.cpp

@@ -0,0 +1,47 @@
+#include <gtest/gtest.h>
+#include <gmock/gmock.h>
+
+#include "SystemUtils.h"
+
+namespace pcpp
+{
+
+	TEST(CoreMaskTest, CreateCoreMaskFromCoreIdsMethod)
+	{
+		const std::vector<int> coreIds{ 0, 1, 2, 3 };
+		CoreMask mask = createCoreMaskFromCoreIds(coreIds);
+
+		EXPECT_EQ(mask, 0x0F);
+	};
+
+	TEST(CoreMaskTest, CreateCoreMaskFromCoreVectorMethod)
+	{
+
+		const std::vector<SystemCore> cores{
+			SystemCores::Core0,
+			SystemCores::Core1,
+			SystemCores::Core2,
+			SystemCores::Core3,
+		};
+
+		CoreMask mask = createCoreMaskFromCoreVector(cores);
+
+		EXPECT_EQ(mask, 0x0F);
+	};
+
+	TEST(CoreMaskTest, CreateCoreVectorFromCoreMaskMethod)
+	{
+		const CoreMask mask = 0x0F;
+		const std::vector<SystemCore> expectedCores = {
+			SystemCores::Core0,
+			SystemCores::Core1,
+			SystemCores::Core2,
+			SystemCores::Core3,
+		};
+		std::vector<SystemCore> cores;
+
+		createCoreVectorFromCoreMask(mask, cores);
+
+		EXPECT_EQ(cores, expectedCores);
+	};
+}  // namespace pcpp