Inga, I came to the same conclusion yesterday. My final solution was to use the TypeMockRegister, Start, and Stop tasks in conjunction with the exec task out to xunit. My common target file looks like this (see the RunXUnitConsole task):
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<Flavor Condition="'$(Flavor)'==''">DebugFull</Flavor>
<CCNetWorkingDirectory Condition="'$(CCNetWorkingDirectory)'==''">$(MsBuildProjectDirectory)</CCNetWorkingDirectory>
<ReportDirectory Condition="'$(ReportDirectory)'==''">$(CCNetWorkingDirectory)BuildResults</ReportDirectory>
<Verbose Condition="'$(Verbose)'==''">false</Verbose>
<XUnitBase Condition="'$(XUnitBase)'==''">$(MSBuildThisFileDirectory)....ExternalNuGetPackagesxunit.runners.1.9.2 ools</XUnitBase>
<XUnitTasks>$(XUnitBase)xunit.runner.msbuild.dll</XUnitTasks>
<XUnitConsole>$(XUnitBase)xunit.console.clr4.x86.exe</XUnitConsole>
<XUnitConsoleConfig>$(MSBuildThisFileDirectory)xunit.console.clr4.x86.exe.config</XUnitConsoleConfig>
<TypeMockBase Condition="'$(TypeMockBase)'==''">$(MSBuildThisFileDirectory)....ExternalNuGetPackagesTypeMock.7.5.6.1lib
et40</TypeMockBase>
<TypeMockTasks>$(TypeMockBase)TypeMock.MSBuild.dll</TypeMockTasks>
<UseTypeMock Condition="'$(UseTypeMock)'==''">false</UseTypeMock>
<IsBuildServer>$(COMPUTERNAME.StartsWith('CISERVER', System.StringComparison.OrdinalIgnoreCase))</IsBuildServer>
<XmlReport>XUnit.TestReport.xml</XmlReport>
</PropertyGroup>
<ItemGroup>
<ReportFiles Include="$(ReportDirectory)*.*" />
</ItemGroup>
<UsingTask TaskName="Xunit.Runner.MSBuild.xunit" AssemblyFile="$(XUnitTasks)" />
<UsingTask TaskName="TypeMock.MSBuild.TypeMockRegister" AssemblyFile="$(TypeMockTasks)" />
<UsingTask TaskName="TypeMock.MSBuild.TypeMockStart" AssemblyFile="$(TypeMockTasks)" />
<UsingTask TaskName="TypeMock.MSBuild.TypeMockStop" AssemblyFile="$(TypeMockTasks)" />
<Target Name="RunXUnitTask">
<Message Text="Using XUnit from $(XUnitBase)..." />
<CallTarget Targets="CreateReportDirectory" />
<CallTarget Targets="StartTypeMock" Condition="$(UseTypeMock)" />
<xunit Assemblies = "@(TestAssembly)"
WorkingFolder="$(CCNetWorkingDirectory)"
Verbose="$(Verbose)"
Xml="$(ReportDirectory)$(XmlReport)">
<Output TaskParameter="ExitCode" PropertyName="ExitCode"/>
</xunit>
<CallTarget Targets="StopTypeMock" Condition="$(UseTypeMock)" />
<Error Text="Test execution failed" Condition="'$(ExitCode)' != 0" />
</Target>
<Target Name="RunXUnitConsole">
<Message Text="Using XUnit from $(XUnitBase)..." />
<CallTarget Targets="CreateReportDirectory" />
<CallTarget Targets="StartTypeMock" Condition="$(UseTypeMock)" />
<CallTarget Targets="CopyXUnitConsoleConfig" />
<Exec ContinueOnError="true" Command=""$(XUnitConsole)" "%(TestAssembly.Identity)" /xml "$(ReportDirectory)%(TestAssembly.Filename).report.xml" /silent">
<Output TaskParameter="ExitCode" PropertyName="ExitCode"/>
</Exec>
<CallTarget Targets="StopTypeMock" Condition="$(UseTypeMock)" />
<CallTarget Targets="MergeXmlReports" />
<Error Text="Console runner test execution failed" Condition="'$(ExitCode)' != 0" />
</Target>
<Target Name="RunXUnitConsoleWithConfig">
<Message Text="Using XUnit from $(XUnitBase)..." />
<CallTarget Targets="CreateReportDirectory" />
<CallTarget Targets="StartTypeMock" Condition="$(UseTypeMock)" />
<CallTarget Targets="CopyXUnitConsoleConfig" />
<Exec ContinueOnError="true" Command=""$(XUnitConsole)" "%(XUnitConfig.Identity)" /silent">
<Output TaskParameter="ExitCode" PropertyName="ExitCode"/>
</Exec>
<CallTarget Targets="StopTypeMock" Condition="$(UseTypeMock)" />
<CallTarget Targets="MergeXmlReports" />
<Error Text="Console runner test execution failed" Condition="'$(ExitCode)' != 0" />
</Target>
<Target Name="CopyXUnitConsoleConfig">
<Copy SourceFiles="$(XUnitConsoleConfig)" DestinationFolder="$(XUnitBase)" />
</Target>
<Target Name="CreateReportDirectory">
<MakeDir Directories="$(ReportDirectory)" Condition = "!Exists('$(ReportDirectory)')"/>
<Delete Files="@(ReportFiles)" />
</Target>
<Target Name="StartTypeMock">
<Message Text="Using TypeMock from $(TypeMockBase)..." />
<CallTarget Targets="RegisterTypeMock" Condition="$(IsBuildServer)" />
<TypeMockStart/>
</Target>
<Target Name="StopTypeMock">
<TypeMockStop/>
</Target>
<Target Name="RegisterTypeMock">
<TypeMockRegister Company="******" License="******" AutoDeploy="true"/>
</Target>
<Target Name="MergeXmlReports">
<ItemGroup>
<XmlReportFiles Include="@(TestAssembly->'$(ReportDirectory)%(filename).report.xml')" />
</ItemGroup>
<Message Text="Merging reports: @(XmlReportFiles->'%(filename)%(extension)')" />
<ItemGroup>
<XmlReportLines Include="<assemblies>"/>
</ItemGroup>
<ReadLinesFromFile File="%(XmlReportFiles.Identity)">
<Output TaskParameter="Lines" ItemName="XmlReportLines"/>
</ReadLinesFromFile>
<ItemGroup>
<XmlReportLines Include="</assemblies>"/>
</ItemGroup>
<Message Text="Writing merged reports to: $(ReportDirectory)$(XmlReport)" />
<WriteLinesToFile File="$(ReportDirectory)$(XmlReport)" Lines="@(XmlReportLines->'%(Identity)', '%0a%0d')" Overwrite="true" Encoding="Unicode" />
</Target>
</Project>
and my solution-specific target looks like this (with the UseTypeMock property set to true):
<Project DefaultTargets="RunTests" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="12.0">
<PropertyGroup>
<XUnitBase>$(MsBuildProjectDirectory)....ExternalNuGetPackagesxunit.runners.1.9.2 ools</XUnitBase>
<TypeMockBase>$(MsBuildProjectDirectory)....ExternalNuGetPackagesTypeMock.7.5.6.1lib
et40</TypeMockBase>
<UseTypeMock>true</UseTypeMock>
</PropertyGroup>
<Import Project ="....CommonMSBuildTargetsCommon.XUnit.targets" />
<ItemGroup>
<TestAssembly Include="testAssembly01.dll" />
<TestAssembly Include="testAssembly02.dll" />
</ItemGroup>
<Target Name="RunTests" DependsOnTargets="RunXUnitConsole" />
</Project>
Note that the common target has the additional benefit of combining the xunit xml reports at the end (just like the xunit task behaves).
