Port to macOS

Signed-off-by: Simon Rozman <simon@rozman.si>

UnitTests/math.cpp

@@ -0,0 +1,44 @@
+/*
+	SPDX-License-Identifier: MIT
+	Copyright © 2023 Amebis
+*/
+
+#include "pch.h"
+
+using namespace std;
+#ifdef _WIN32
+using namespace Microsoft::VisualStudio::CppUnitTestFramework;
+#endif
+
+namespace UnitTests
+{
+	TEST_CLASS(math)
+	{
+	public:
+		TEST_METHOD(mul)
+		{
+			Assert::AreEqual<size_t>(10, stdex::mul(2, 5));
+			Assert::AreEqual<size_t>(10, stdex::mul(5, 2));
+			Assert::AreEqual<size_t>(0, stdex::mul(0, 10));
+			Assert::AreEqual<size_t>(0, stdex::mul(10, 0));
+			Assert::AreEqual<size_t>(0, stdex::mul(SIZE_MAX, 0));
+			Assert::AreEqual<size_t>(0, stdex::mul(0, SIZE_MAX));
+			Assert::AreEqual<size_t>(SIZE_MAX, stdex::mul(SIZE_MAX, 1));
+			Assert::AreEqual<size_t>(SIZE_MAX, stdex::mul(1, SIZE_MAX));
+			Assert::ExpectException<std::invalid_argument>([] { stdex::mul(SIZE_MAX, 2); });
+			Assert::ExpectException<std::invalid_argument>([] { stdex::mul(2, SIZE_MAX); });
+		}
+
+		TEST_METHOD(add)
+		{
+			Assert::AreEqual<size_t>(7, stdex::add(2, 5));
+			Assert::AreEqual<size_t>(7, stdex::add(5, 2));
+			Assert::AreEqual<size_t>(10, stdex::add(0, 10));
+			Assert::AreEqual<size_t>(10, stdex::add(10, 0));
+			Assert::AreEqual<size_t>(SIZE_MAX, stdex::add(SIZE_MAX, 0));
+			Assert::AreEqual<size_t>(SIZE_MAX, stdex::add(0, SIZE_MAX));
+			Assert::ExpectException<std::invalid_argument>([] { stdex::add(SIZE_MAX, 1); });
+			Assert::ExpectException<std::invalid_argument>([] { stdex::add(1, SIZE_MAX); });
+		}
+	};
+}