aspnetcore/eng/targets/FunctionalTestWithAssets.targets

<Project>
  <!--
    Test asset publication support intended for case where an asset is referenced in a single test project.
    References in more than one or two test projects would slow the build because each restore or publish
    operation gets unique (per-test project) global properties.

    Hook into Build target in addition to Publish (for Helix), RunTests (for Arcade), and VSTest (for dotnet test)
    because VS does not use a target when discovering or executing tests (examines test assembly instead). Need
    those targets too to ensure everything is up-to-date when executing tests.
  -->
  <Target Name="PublishTestAssets"
      BeforeTargets="Build;Publish;RunTests;VSTest"
      Condition=" '$(ExcludeFromBuild)' != 'true' AND
        '$(DotNetBuildFromSource)' != 'true' AND
        '@(TestAssetProjectReference->Count())' != '0' ">
    <ItemGroup>
      <_ProjectsToPublish Include="@(TestAssetProjectReference)" />

      <!-- Always Publish test assets relative to test project's output. -->
      <_ProjectsToPublish AdditionalProperties="%(_ProjectsToPublish.AdditionalProperties);
          PublishDir=$(PublishDir)%(RelativeFolder)" />

      <!-- Do not build when publishing if SkipBuild requested. -->
      <_ProjectsToPublish Condition=" '%(SkipBuild)' == 'true' "
          AdditionalProperties="%(_ProjectsToPublish.AdditionalProperties);NoBuild=true" />

      <!--
        Otherwise, both Build and Publish test assets into folders relative to test project's output. Reset
        NoBuild because these projects aren't referenced anywhere else.
      -->
      <_ProjectsToPublish Condition=" '%(SkipBuild)' != 'true' "
          AdditionalProperties="%(_ProjectsToPublish.AdditionalProperties);
            NoBuild=false;
            OutputPath=$(OutputPath)%(RelativeFolder)" />
    </ItemGroup>

    <!--
      These are separate invocations to ensure Publish sees restored setup. Platform and PlatformTarget removals
      are to fix builds inside VS.
    -->
    <MSBuild Projects="@(_ProjectsToPublish->WithMetadataValue('SkipBuild', 'false'))"
        BuildInParallel="$(BuildInParallel)"
        Properties="MSBuildRestoreSessionId=$([System.Guid]::NewGuid())"
        RemoveProperties="Platform;PlatformTarget"
        Targets="Restore" />
    <MSBuild Projects="@(_ProjectsToPublish)" Targets="Publish" RemoveProperties="Platform;PlatformTarget" />
  </Target>
</Project>