Enabling .NET 9 tests for SF SDK packages

[plave0]

This PR enables tests for .NET 9 builds.

Compatibility with the deprecated BinaryFormatter has been introduced so that .NET 9 tests can be enabled.

Additionally, we are moving away from the buils.ps1 script, which uses msbuild under the hood. Instead, we are moving to the dotnet tool, in the aim of streamlining the build process and infrastructure.

Internal ADO work item: https://dev.azure.com/msazure/One/_workitems/edit/29603235

[plave0]

@olegsych, these are the changes I made for now.

When running dotnet test .\code.sln --no-build -v q, I get the following warnings:

C:\Program Files\dotnet\sdk\9.0.100-rc.1.24452.12\Microsoft.TestPlatform.targets(48,5): warning : [xUnit.net 00:00:00.10] Skipping: Microsoft.ServiceFabric.Services.Tests (could not find dependent assembly 'System.Runtime, Version=9.0.0')
C:\Program Files\dotnet\sdk\9.0.100-rc.1.24452.12\Microsoft.TestPlatform.targets(48,5): warning : No test is available in Q:\source\service-fabric-services-and-actors-dotnet\test\unittests\Microsoft.ServiceFabric.Services.Tests\bin\Debug\Microsoft.ServiceFabric.Services.Tests.dll. Make sure that test discoverer & executors are registered and platform & framework version settings are appropriate and try again.
C:\Program Files\dotnet\sdk\9.0.100-rc.1.24452.12\Microsoft.TestPlatform.targets(48,5): warning : [xUnit.net 00:00:00.14] Skipping: Microsoft.ServiceFabric.Services.Tests (could not find dependent assembly 'System.Runtime, Version=9.0.0')
C:\Program Files\dotnet\sdk\9.0.100-rc.1.24452.12\Microsoft.TestPlatform.targets(48,5): warning : No test is available in Q:\source\service-fabric-services-and-actors-dotnet\test\unittests\Microsoft.ServiceFabric.Services.Tests\bin\Debug\Microsoft.ServiceFabric.Services.Tests.dll. Make sure that test discoverer & executors are registered and platform & framework version settings are appropriate and try again.

This does not happen for the other suits where I enabled .NET 9 tests. Do this error messages look familiar?

[plave0]

@olegsych, also, Build test is failing due to being unable to build .NET 9 tests, so we will have to change the pipeline after all, in order to include the .NET 9 SDK.

[olegsych]

@plave0 I think the solution may not be setup to build both net8.0 and net9.0 binaries at the same time. Try specifying only <TargetFramework>net9.0</TargetFramework> in the test projects and see if the tests run correctly just on .NET 9.

I suspect the problem preventing .NET 9 tests from running in addition to .NET 8 is here: https://github.com/microsoft/service-fabric-services-and-actors-dotnet/blob/develop/properties/service_fabric_common.props#L10. I'm not sure why we are overriding the OutputPath property with what should be its default value. In combination with this https://github.com/microsoft/service-fabric-services-and-actors-dotnet/blob/develop/properties/service_fabric_managed_common.props#L12, we are forcing binaries with different target frameworks to override each other. In a clean new xUnit test project, these properties are not specified and the build output is directed to bin\$(Configuration)\$(TargetFramework). I think we should remove both overrides, use the default build output structure with the extra folder for the target framework.

[olegsych]

We seem to be having a lot of scope creep and I want us to have a meaningful result to demo on Monday. So if you can get the tests running on .NET 9, without .NET 8, I think that might be a good stopping point for this PR.

Making the solution build projects with additional folder for target framework could need more changes and we don't have much time left. So I would start that as a separate pull request next.

[plave0]

@olegsych, I agree with your suggestion. I have reverted back to targeting only .NET 9.