Migrate tests to xUnit v3 with Microsoft.Testing.Platform

[Copilot]

Description

Migrates test infrastructure from xUnit v2 to xUnit v3 with Microsoft.Testing.Platform (MTP) for modern test execution and built-in retry support.

Package changes:

• xunit 2.9.3 → xunit.v3 3.2.2
• Removed: xunit.assert, xunit.extensibility.core, xunit.runner.visualstudio, Microsoft.NET.Test.Sdk, Xunit.SkippableFact
• Added: xunit.v3.extensibility.core, Microsoft.Testing.Extensions.Retry

Build configuration:

• Test projects build as executables (OutputType=Exe) for MTP
• Enabled UseMicrosoftTestingPlatformRunner=true

Retry mechanism:

• Removed v2 extensibility code (CustomXunitTestFramework, discoverers, RetryTestCase)
• RetryFact/RetryTheory retained as markers; actual retries via MTP: dotnet test -- --retry-failed-tests 3

Xunit.SkippableFact migration:

• Created SkipCompatibility.cs providing Skip.If()/Skip.IfNot() using xUnit v3's Assert.Skip()
• Converted all [SkippableFact] → [Fact]

Related issues

User request for Microsoft.Testing.Platform migration with built-in retry support.

Testing

• Microsoft.Health.Extensions.Xunit builds successfully for net8.0/net9.0
• Full solution build requires CI environment with private NuGet feed access

FHIR Team Checklist

• Update the title of the PR to be succinct and less than 65 characters
• Add a milestone to the PR for the sprint that it is merged (i.e. add S47)
• Tag the PR with the type of update: Bug, Build, Dependencies, Enhancement, New-Feature or Documentation
• Tag the PR with Open source, Azure API for FHIR (CosmosDB or common code) or Azure Healthcare APIs (SQL or common code) to specify where this change is intended to be released.
• Tag the PR with Schema Version backward compatible or Schema Version backward incompatible or Schema Version unchanged if this adds or updates Sql script which is/is not backward compatible with the code.
• When changing or adding behavior, if your code modifies the system design or changes design assumptions, please create and include an ADR.
• CI is green before merge
• Review squash-merge requirements

Semver Change (docs)

Patch

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• microsofthealthoss.pkgs.visualstudio.com
  • Triggering command: /usr/bin/dotnet dotnet restore --ignore-failed-sources (dns block)
  • Triggering command: /usr/bin/dotnet dotnet build src/Microsoft.Health.Extensions.Xunit/Microsoft.Health.Extensions.Xunit.csproj --no-restore -p:TreatWarningsAsErrors=false (dns block)
  • Triggering command: /usr/bin/dotnet dotnet build src/Microsoft.Health.Extensions.Xunit/Microsoft.Health.Extensions.Xunit.csproj --no-restore -p:TreatWarningsAsErrors=false -p:WarningsAsErrors= (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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[mikaelweave]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mikaelweave]

@copilot You can see some errors from #file:91.txt during the build pipelines

[Copilot]

@copilot You can see some errors from #file:91.txt during the build pipelines

I don't have direct access to the Azure DevOps pipeline logs or the #file:91.txt file you mentioned. Could you please share the specific error messages from the build? You can either:

1. Paste the relevant error lines directly in a comment
2. Provide the Azure DevOps build link so I can try to retrieve the logs

This will help me identify and fix the build issues.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• microsofthealthoss.pkgs.visualstudio.com
  • Triggering command: /usr/bin/dotnet dotnet restore --ignore-failed-sources -p:TreatWarningsAsErrors=false (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[mikaelweave]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mikaelweave]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mikaelweave]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mikaelweave]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).