rainmeter-studio/Docs/UnitTests.md

Rainmeter uses the Visual Studio Native Unit Testing framework for unit testing.

General notes

All unit test files should have the <ExcludedFromBuild>$(ExcludeTests)</ExcludedFromBuild> property set. The easiest way to ensure this is to manually edit the ClCompile entry of the project .vcxproj file. Make sure it looks something like this:

    <ClCompile Include="ConfigParser_Test.cpp">
      <ExcludedFromBuild>$(ExcludeTests)</ExcludedFromBuild>
    </ClCompile>

When building within Visual Studio, the macro $(ExcludeTests) evaluates to false (i.e. the test files are not excluded). When building using Build.bat, it evaluates to true, and, consequently, the test files are excluded from the build. This is done in order to both reduce the actual build size and remove any kind of dependency on Microsoft.VisualStudio.TestTools.CppUnitTestFramework.dll (see below).

Project type specific notes

• Static library projects:

  Unit testing static library project requires the use of a separate DLL project. The static library project contains the actual code while the DLL project references the static library and includes the testing code.

  See Common\Common.vcxproj and Common\Common_Test.vcxproj for an example.

• Dynamic library projects:

  A unit tested dynamic library project should contain both the actual code and the testing code.

  In addition, the $(DelayLoadTestDLL) macro should be included in the linker Delay Loaded Dlls option. The VS unit testing framework introduces a dependency on Microsoft.VisualStudio.TestTools.CppUnitTestFramework.dll for dynamic library projects, which means that omitting the $(DelayLoadTestDLL) macro will result in the dynamic library failing to load.