Daily Test Coverage Improver - .NET 6 Runtime Required for Coverage Steps

[dsyme]

Issue Description

The Daily Test Coverage Improver workflow cannot complete the coverage steps because the test project targets net6.0, which requires the .NET 6.0 runtime to execute tests.

Current Situation

• ✅ The project can be built with .NET 8 or 9 SDKs (after updating global.json with rollForward: "latestMajor")
• ✅ AltCover instrumentation works correctly
• ❌ Test execution fails because the .NET 6.0 runtime is not installed in the GitHub Actions environment

Error Details

Test run for /home/runner/work/.../FSharp.Stats.Tests.dll (.NETCoreApp,Version=v6.0)
You must install or update .NET to run this application.
Framework: 'Microsoft.NETCore.App', version '6.0.0' (x64)

Solution Options

Option 1: Install .NET 6 Runtime in Workflow (Recommended for immediate fix)

Update the workflow that calls the coverage-steps action to include:

- name: Setup .NET 6
  uses: actions/setup-dotnet@v4
  with:
    dotnet-version: '6.x'

This maintains compatibility with the current project configuration.

Option 2: Update Test Project Target Framework

Update tests/FSharp.Stats.Tests/FSharp.Stats.Tests.fsproj to target net8.0 instead of net6.0:

<TargetFramework>net8.0</TargetFramework>

Pros:

• No need for .NET 6 runtime installation
• Uses more current .NET version
• Simplifies CI/CD setup

Cons:

• May affect compatibility if consumers depend on .NET 6 behavior
• Requires testing to ensure no breaking changes

Option 3: Multi-target Both Versions

<TargetFrameworks>net6.0;net8.0</TargetFrameworks>

This ensures compatibility with both versions but increases build time.

Impact

Currently, the Daily Test Coverage Improver workflow cannot:

• Generate coverage reports
• Analyze test coverage gaps
• Create pull requests with test improvements

Related PR

See PR #[number] for the coverage-steps action configuration that needs .NET 6 runtime.

Recommendation

For this repository: Since this is a trial/testing repository for the GitHub Actions Workflow agent, I recommend Option 1 (installing .NET 6 runtime) as the quickest fix to unblock the workflow.

For the upstream FSharp.Stats project: Consider Option 2 (updating to net8.0) if .NET 6 compatibility is no longer required, as .NET 6 reached end-of-support.

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🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com