[Sprint 7] test(domain): fix xunit.v3 source-level breaks in Domain.Tests

[mpaulosky]

Goal

Resolve any source-level compile/test breaks introduced by the v3 swap. Expect potential namespace nudges and assertion overload disambiguation.

Context

Part of the xUnit v3 migration pilot (Sprints 7–13). The pilot validates the migration process on tests/Domain.Tests before any other project is touched. Plan thread: see Sprint 7 milestone.

Acceptance Criteria

• dotnet build tests/Domain.Tests --configuration Release clean (warnings-as-errors)
• dotnet test tests/Domain.Tests --configuration Release --no-build all pass
• dotnet run --project tests/Domain.Tests --configuration Release runs the standalone executable and reports pass
• No async void tests; no removed types in use (verified)
• Coverage still produced via Coverlet

References

• Migration guide: https://xunit.net/docs/getting-started/v3/migration
• What's new: https://xunit.net/docs/getting-started/v3/whats-new
• MTP: https://xunit.net/docs/getting-started/v3/microsoft-testing-platform

Squad

Gimli (Tester)

[github-actions]

📋 Assigned to Gimli (Tester)

Issue: #164 — [Sprint 7] test(domain): fix xunit.v3 source-level breaks in Domain.Tests

Gimli will pick this up in the next Copilot session.

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Gimli, work on issue #164