ci: exclude the self-update version test that this fork inverts

[Nana Mensa-Bonsu (kombonsu)]

What

Stop Runner CI failing on a test that cannot pass in this fork.

• .github/workflows/build.yml: the L0 step gains TestFilter, excluding SelfUpdaterL0.TestSelfUpdateAsync_NoUpdateOnOldVersion.
• src/dir.proj: the Test target passes --filter to dotnet test when TestFilter is set, and is unchanged when it is not.

Why

Runner CI has failed on every run in this repo's history, including pushes to main. The x64 job reports Runner package '.../actions-runner-linux-x64-2.337.0.tar.gz' failed after 3 download attempts, which reads like a network flake and is not one — the test dies in ~200 ms, and no HTTP request is ever made.

The test asserts that a refresh to 2.200.0 is declined for being older than the running runner. This fork pins src/runnerversion to 0.0.1, and dir.proj compiles that into BuildConstants.RunnerPackage.Version. SelfUpdater.UpdateNeeded returns serverVersion.CompareTo(runnerVersion) > 0, so 2.200.0 > 0.0.1 is true and SelfUpdate enters DownloadLatestRunner — the branch the test never expected to reach. That branch calls HostContext.CreateHttpClientHandler(), and this is the only SelfUpdaterL0 test that does not register IHttpClientHandlerFactory, so TestHostContext throws Singleton instance not registered. The retry loop swallows it three times and reports a download failure.

The filter targets the one broken test rather than the class: the other three tests in SelfUpdaterL0 pass and cover the download, retry, and hash-validation paths. Putting the exclusion in build.yml keeps it and its rationale next to the job that needs it, and leaves a plain ./dev.sh test behaving exactly as before.

Not in this PR

• The underlying fix, which is to stop pinning src/runnerversion to 0.0.1. That also closes the image-tag drift this repo documents in AGENTS.md (0.0.1 vs 2.329.0 in images/Dockerfile), but it changes the tag publish-image.yml stamps on published images, so it needs its own change and its own gitops follow-up.
• Any Node 24 action upgrades. Those are ci: upgrade GitHub Actions to Node 24 majors #27, which is blocked behind this failure.

Test plan

• build.yml parses (PyYAML); the L0 step's env and run resolve as intended.
• src/dir.proj parses (ElementTree); the Test target contains the conditional TestFilterArg and both Exec commands.
• actionlint on build.yml reports no new findings (its only output is the pre-existing actions/checkout@v3, which ci: upgrade GitHub Actions to Node 24 majors #27 fixes).
• Runner CI on this branch: build (linux-x64) passed in 1m57s. The L0 log echoes the filter and reports Passed! - Failed: 0, Passed: 649, Skipped: 0, Total: 649 — one test fewer than the 650 collected before, so exactly the intended test was excluded.

Refs DEVOPS-204

[Copilot]

Copilot review overview

🟢 Approval recommended

The filtering is correctly scoped; only a minor documentation correction remains.

Review effort: Balanced
Findings: 1

Open (1)

• Clarify that RunnerVersion is compiled into the test · New

What changed in this PR

Adds targeted CI filtering for a self-update test invalidated by this fork’s pinned runner version, unblocking Runner CI and PR #27.

Changes:

• Adds optional TestFilter forwarding to dotnet test.
• Excludes only the incompatible self-update test in CI.

File	Description
src/​dir.proj	Conditionally forwards the test filter.
.github/​workflows/​build.yml	Configures the targeted exclusion.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.