mcaf-dotnet-mstest

MCAF: .NET MSTest

Trigger On

• the repo uses MSTest
• you need to add, run, debug, or repair MSTest tests
• the repo is moving between VSTest and Microsoft.Testing.Platform

Value

• produce a concrete project delta: code, docs, config, tests, CI, or review artifact
• reduce ambiguity through explicit planning, verification, and final validation skills
• leave reusable project context so future tasks are faster and safer

Do Not Use For

• xUnit projects
• TUnit projects
• generic test strategy with no MSTest-specific mechanics

Inputs

• the nearest AGENTS.md
• the test project file and package references
• the active MSTest runner model

Quick Start

1. Read the nearest AGENTS.md and confirm scope and constraints.
2. Run this skill's Workflow through the Ralph Loop until outcomes are acceptable.
3. Return the Required Result Format with concrete artifacts and verification evidence.

Workflow

1. Detect the MSTest project style first:
   • MSTest.Sdk project SDK
   • MSTest meta-package
   • legacy package set with explicit Microsoft.NET.Test.Sdk
2. Read the repo's real test command from AGENTS.md. If the repo has no explicit command yet, start with dotnet test PROJECT_OR_SOLUTION.
3. Keep the runner model consistent:
   • MSTest.Sdk defaults to the MSTest runner on Microsoft.Testing.Platform
   • VSTest is opt-in with UseVSTest=true or legacy package choices
   • do not pass VSTest-only switches or assume legacy .runsettings behavior on Microsoft.Testing.Platform jobs
4. Prefer [DataRow] or DynamicData for stable data-driven coverage. Keep test lifecycle hooks minimal and deterministic.
5. Keep MSTest analyzers enabled and fix findings instead of muting them casually.
6. Align coverage/reporting packages with the active runner.

Bootstrap When Missing

If MSTest is requested but not configured:

1. Detect current framework first:
   • rg -n "MSTest\\.Sdk|PackageReference Include=\"MSTest\"|xunit|TUnit|UseVSTest|TestingPlatformDotnetTestSupport" -g '*.csproj' .
2. If the repo currently uses xUnit or TUnit, do not auto-migrate. Return status: not_applicable unless migration is explicitly requested.
3. For explicit MSTest adoption, add package(s) to target test project:
   • dotnet add TEST_PROJECT.csproj package MSTest
4. Document runner model (MSTest.Sdk default MTP vs UseVSTest) in AGENTS.md.
5. Run dotnet test TEST_PROJECT.csproj and return status: configured or status: improved.