From 1e993c8c65d19d1fddd546931e793452d47ff7f8 Mon Sep 17 00:00:00 2001
From: Simon Rozman <simon@rozman.si>
Date: Mon, 11 Sep 2023 17:34:40 +0200
Subject: [PATCH] math: port unit tests to XCode

Signed-off-by: Simon Rozman <simon@rozman.si>
---
 mac/UnitTests.xcodeproj/project.pbxproj |  6 ++++
 mac/UnitTests/common.hpp                | 18 ++++++++++++
 mac/UnitTests/main.cpp                  | 17 ++++++++---
 mac/UnitTests/math.hpp                  | 39 +++++++++++++++++++++++++
 4 files changed, 76 insertions(+), 4 deletions(-)
 create mode 100644 mac/UnitTests/common.hpp
 create mode 100644 mac/UnitTests/math.hpp

diff --git a/mac/UnitTests.xcodeproj/project.pbxproj b/mac/UnitTests.xcodeproj/project.pbxproj
index dbe98c2dd..1fa59934e 100644
--- a/mac/UnitTests.xcodeproj/project.pbxproj
+++ b/mac/UnitTests.xcodeproj/project.pbxproj
@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		F48105AD2AAF5FD4004DE682 /* math.hpp in Sources */ = {isa = PBXBuildFile; fileRef = F48105AC2AAF5FD4004DE682 /* math.hpp */; };
 		F4B7FBE02AAF49BC00C6BE9F /* main.cpp in Sources */ = {isa = PBXBuildFile; fileRef = F4B7FBDF2AAF49BC00C6BE9F /* main.cpp */; };
 /* End PBXBuildFile section */
 
@@ -23,6 +24,8 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		F48105AC2AAF5FD4004DE682 /* math.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = math.hpp; sourceTree = "<group>"; };
+		F48105AE2AAF64C7004DE682 /* common.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = common.hpp; sourceTree = "<group>"; };
 		F4B7FBDC2AAF49BC00C6BE9F /* UnitTests */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = UnitTests; sourceTree = BUILT_PRODUCTS_DIR; };
 		F4B7FBDF2AAF49BC00C6BE9F /* main.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = main.cpp; sourceTree = "<group>"; };
 /* End PBXFileReference section */
@@ -58,6 +61,8 @@
 		F4B7FBDE2AAF49BC00C6BE9F /* UnitTests */ = {
 			isa = PBXGroup;
 			children = (
+				F48105AE2AAF64C7004DE682 /* common.hpp */,
+				F48105AC2AAF5FD4004DE682 /* math.hpp */,
 				F4B7FBDF2AAF49BC00C6BE9F /* main.cpp */,
 			);
 			path = UnitTests;
@@ -121,6 +126,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				F4B7FBE02AAF49BC00C6BE9F /* main.cpp in Sources */,
+				F48105AD2AAF5FD4004DE682 /* math.hpp in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
diff --git a/mac/UnitTests/common.hpp b/mac/UnitTests/common.hpp
new file mode 100644
index 000000000..12a0b9d08
--- /dev/null
+++ b/mac/UnitTests/common.hpp
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <stdexcept>
+
+template <class T>
+void are_equal(const T& a, const T& b)
+{
+	if (!(a == b))
+		throw std::runtime_error("values are not equal");
+}
+
+template <class E, typename F>
+void expect_exception(F functor)
+{
+	try { functor(); }
+	catch (const E&) { return; }
+	throw std::runtime_error("exception expected");
+}
diff --git a/mac/UnitTests/main.cpp b/mac/UnitTests/main.cpp
index 1bad0d9b3..63a8a242a 100644
--- a/mac/UnitTests/main.cpp
+++ b/mac/UnitTests/main.cpp
@@ -1,7 +1,16 @@
+#include "math.hpp"
 #include <iostream>
 
-int main(int argc, const char * argv[]) {
-	// insert code here...
-	std::cout << "Hello, World!\n";
-	return 0;
+int main(int argc, const char * argv[])
+{
+	try {
+		UnitTests::math::mul();
+		UnitTests::math::add();
+		std::cout << "PASS\n";
+		return 0;
+	}
+	catch (const std::exception& ex) {
+		std::cerr << ex.what() << " FAIL\n";
+		return 1;
+	}
 }
diff --git a/mac/UnitTests/math.hpp b/mac/UnitTests/math.hpp
new file mode 100644
index 000000000..06c32bf4a
--- /dev/null
+++ b/mac/UnitTests/math.hpp
@@ -0,0 +1,39 @@
+#pragma once
+
+#include "common.hpp"
+#include <stdex/math.hpp>
+
+using namespace std;
+
+namespace UnitTests
+{
+	class math
+	{
+	public:
+		static void mul()
+		{
+			are_equal<size_t>(10, stdex::mul(2, 5));
+			are_equal<size_t>(10, stdex::mul(5, 2));
+			are_equal<size_t>(0, stdex::mul(0, 10));
+			are_equal<size_t>(0, stdex::mul(10, 0));
+			are_equal<size_t>(0, stdex::mul(SIZE_MAX, 0));
+			are_equal<size_t>(0, stdex::mul(0, SIZE_MAX));
+			are_equal<size_t>(SIZE_MAX, stdex::mul(SIZE_MAX, 1));
+			are_equal<size_t>(SIZE_MAX, stdex::mul(1, SIZE_MAX));
+			expect_exception<std::invalid_argument>([] { stdex::mul(SIZE_MAX, 2); });
+			expect_exception<std::invalid_argument>([] { stdex::mul(2, SIZE_MAX); });
+		}
+
+		static void add()
+		{
+			are_equal<size_t>(7, stdex::add(2, 5));
+			are_equal<size_t>(7, stdex::add(5, 2));
+			are_equal<size_t>(10, stdex::add(0, 10));
+			are_equal<size_t>(10, stdex::add(10, 0));
+			are_equal<size_t>(SIZE_MAX, stdex::add(SIZE_MAX, 0));
+			are_equal<size_t>(SIZE_MAX, stdex::add(0, SIZE_MAX));
+			expect_exception<std::invalid_argument>([] { stdex::add(SIZE_MAX, 1); });
+			expect_exception<std::invalid_argument>([] { stdex::add(1, SIZE_MAX); });
+		}
+	};
+}