UnitTests: Introduce

Other than having a convenient framework to test our helpers, this
allows CodeQL code analysis GitHub action.

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

UnitTests/Shell.cpp

@@ -0,0 +1,30 @@
+/*
+	SPDX-License-Identifier: MIT
+	Copyright © 2022 Amebis
+*/
+
+#include "pch.h"
+
+using namespace std;
+using namespace Microsoft::VisualStudio::CppUnitTestFramework;
+
+namespace UnitTests
+{
+	TEST_CLASS(Shell)
+	{
+	public:
+		TEST_METHOD(PathCanonicalizeA)
+		{
+			string path;
+			Assert::IsTrue(::PathCanonicalizeA(path, "C:\\Windows\\Temp\\test\\.."));
+			Assert::AreEqual("C:\\Windows\\Temp", path.c_str(), true);
+		}
+
+		TEST_METHOD(PathCanonicalizeW)
+		{
+			wstring path;
+			Assert::IsTrue(::PathCanonicalizeW(path, L"C:\\Windows\\Temp\\test\\.."));
+			Assert::AreEqual(L"C:\\Windows\\Temp", path.c_str(), true);
+		}
+	};
+}