Add Common_Test project and PathUtil_Test.cpp

The tests use the new Native Unit Test framework in VS2012.

Common/Common_Test.vcxproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(SolutionDir)\Project.props" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{442084A6-2069-4927-B0C9-51525A720CB2}</ProjectGuid>
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <Import Project="$(SolutionDir)\Rainmeter.props" />
+  <PropertyGroup>
+    <OutDir>$(IntDir)</OutDir>
+  </PropertyGroup>
+  <ItemGroup>
+    <ClCompile Include="PathUtil_Test.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="Common.vcxproj">
+      <Project>{19312085-aa51-4bd6-be92-4b6098cca539}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

Common/Common_Test.vcxproj.filters

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <ClCompile Include="PathUtil_Test.cpp" />
+  </ItemGroup>
+</Project>

Common/PathUtil_Test.cpp

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+/*
+  Copyright (C) 2013 Rainmeter Team
+
+  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 2
+  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, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*/
+
+#include "CppUnitTest.h"
+#include "PathUtil.h"
+#include <Shlobj.h>
+
+using namespace Microsoft::VisualStudio::CppUnitTestFramework;
+
+namespace PathUtil {
+
+TEST_CLASS(Common_PathUtil_Test)
+{
+public:
+	TEST_METHOD(TestIsSeparator)
+	{
+		Assert::IsTrue(IsSeparator(L'\\'));
+		Assert::IsTrue(IsSeparator(L'/'));
+		Assert::IsFalse(IsSeparator(L'.'));
+	}
+
+	TEST_METHOD(TestIsDotOrDotDot)
+	{
+		Assert::IsTrue(IsDotOrDotDot(L"."));
+		Assert::IsTrue(IsDotOrDotDot(L".."));
+		Assert::IsFalse(IsDotOrDotDot(L"..."));
+		Assert::IsFalse(IsDotOrDotDot(L""));
+	}
+
+	TEST_METHOD(TestIsUNC)
+	{
+		Assert::IsTrue(IsUNC(L"\\\\server"));
+		Assert::IsTrue(IsUNC(L"//server"));
+	}
+
+	TEST_METHOD(TestIsAbsolute)
+	{
+		Assert::IsTrue(IsAbsolute(L"\\\\server"));
+		Assert::IsTrue(IsAbsolute(L"C:\\test"));
+		Assert::IsTrue(IsAbsolute(L"C:/test"));
+		Assert::IsFalse(IsAbsolute(L"C:"));
+	}
+
+	TEST_METHOD(TestAppendBacklashIfMissing)
+	{
+		std::wstring path;
+		AppendBacklashIfMissing(path);
+		Assert::IsTrue(path.empty());
+
+		std::wstring path2 = L"C:\\test";
+		AppendBacklashIfMissing(path2);
+		Assert::IsTrue(path2 == L"C:\\test\\");
+
+		std::wstring path3 = L"C:\\test\\";
+		AppendBacklashIfMissing(path3);
+		Assert::IsTrue(path3 == L"C:\\test\\");
+	}
+
+	TEST_METHOD(TestGetFolderFromFilePath)
+	{
+		Assert::IsTrue(GetFolderFromFilePath(L"C:\\test.txt") == L"C:\\");
+	}
+
+	TEST_METHOD(TestGetVolume)
+	{
+		Assert::IsTrue(GetVolume(L"C:\\test.txt") == L"C:");
+		Assert::IsTrue(GetVolume(L"\\\\server\\share\\") == L"\\\\server\\share");
+		Assert::IsTrue(GetVolume(L"\\\\server\\C:\\path\\") == L"\\\\server\\C:");
+	}
+
+	TEST_METHOD(TestExpandEnvironmentVariables)
+	{
+		WCHAR appdataPath[MAX_PATH];
+		SHGetFolderPath(nullptr, CSIDL_APPDATA, nullptr, SHGFP_TYPE_CURRENT, appdataPath);
+
+		WCHAR windirPath[MAX_PATH];
+		ExpandEnvironmentStrings(L"%WINDIR%", windirPath, MAX_PATH);
+		
+		std::wstring test = L"%APPDATA%";
+		PathUtil::ExpandEnvironmentVariables(test);
+		Assert::IsTrue(test == appdataPath);
+
+		std::wstring test2 = L"%APPDATA%%WINDIR%";
+		PathUtil::ExpandEnvironmentVariables(test2);
+		Assert::IsTrue(test2 == ((std::wstring)appdataPath + windirPath));
+
+		std::wstring test3 = L"%APPDATA%%WINDIR%%APPDATA%";
+		PathUtil::ExpandEnvironmentVariables(test3);
+		Assert::IsTrue(test3 == ((std::wstring)appdataPath + windirPath + appdataPath));
+	}
+};
+
+}  // namespace PathUtil