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chore(ci): measure backend test coverage, report only - #779
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tools/coverage/collect.sh drives dotnet test with the XPlat Code Coverage collector across all four test projects, per tools/coverage/coverlet.runsettings, then merges each project's cobertura output through reportgenerator into coverage-out/report/<name> plus a combined report, and writes coverage-out/SUMMARY.md by concatenating each generated SummaryGithub.md under a fixed caveat preamble. Report only: nothing here gates anything. --project <name> runs a single project for local iteration. Verified --project Domain end to end.
Runs tools/coverage/collect.sh on a Monday schedule, workflow_dispatch, and a pull_request scoped to the tooling's own inputs (never ci.yml's critical path, which #775 exists to shorten). Uploads the report artifact and appends SUMMARY.md to the job summary. Gates nothing: no continue-on-error, so a failing test still fails the run, but the coverage numbers themselves are not enforced.
Adds docs/decisions/776-backend-coverage.md (no incident, forward-looking: report only, no threshold, why the obvious alternatives don't work) with the first measured run's numbers and the two readings of them that are wrong (unit suites look redundant with Integration by line count, and Application's 13.9% looks like layer coverage when it's the unit project's own reach). Indexes it in docs/decisions/README.md, adds one AGENTS.md bullet under Build / test / run, and points CONTRIBUTING.md's Tests section at the script.
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Important
This repository does not receive automatic reviews because it has fewer than 10 stars. ⚙️ Run configurationConfiguration used: Organization UI Review profile: CHILL Plan: Advanced Run ID: 📝 WalkthroughWalkthroughThe PR adds report-only backend coverage for four .NET test projects. It configures Coverlet and ReportGenerator, creates local and CI reporting scripts, publishes scheduled coverage artifacts, ignores generated output, and documents the decision and scope. ChangesBackend coverage measurement
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Other Sequence Diagram(s)sequenceDiagram
participant GitHubActions
participant dotnet
participant collect.sh
participant ReportGenerator
participant Artifact
GitHubActions->>dotnet: Restore the solution in locked mode
GitHubActions->>collect.sh: Run backend coverage
collect.sh->>dotnet: Test four projects with XPlat Code Coverage
dotnet-->>collect.sh: Write cobertura results
collect.sh->>ReportGenerator: Generate project and combined reports
ReportGenerator-->>collect.sh: Write HTML, Markdown, and text reports
GitHubActions->>Artifact: Upload coverage reports
Merge Risk: 🔵 Low · up to Changes to the coverage package version or lock files can merge without exercising the coverage workflow until the next scheduled run. Add those inputs to the pull-request path filter before merge. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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In @.github/workflows/coverage.yml:
- Around line 25-29: Update the coverage workflow’s paths filter to include
Directory.Packages.props and the recursive tests/**/packages.lock.json pattern,
so changes to central or locked coverage dependencies trigger the coverage job.
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⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Advanced
Run ID: c5b12d76-b58b-4695-992a-9109fedf9394
📒 Files selected for processing (15)
.config/dotnet-tools.json.github/workflows/coverage.yml.gitignoreAGENTS.mdCONTRIBUTING.mdDirectory.Packages.propsdocs/decisions/776-backend-coverage.mddocs/decisions/README.mdtests/Cluckwork.Api.IntegrationTests/packages.lock.jsontests/Cluckwork.AppHost.Tests/packages.lock.jsontests/Cluckwork.Application.Tests/packages.lock.jsontests/Cluckwork.Domain.Tests/packages.lock.jsontests/Directory.Build.propstools/coverage/collect.shtools/coverage/coverlet.runsettings
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… changes The pull_request path filter named tools/coverage/ and the test build props but not Directory.Packages.props or the test lock files, so a Dependabot bump of coverlet.collector would change what collection does without ever running collection — the rot the filter exists to prevent. #684 already required every path filter to name the props file explicitly; this restores that.
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@coderabbitai review The path-filter finding from the previous round is fixed in
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Tip For best results, initiate chat on the files or code changes. 🧩 Analysis chain🏁 Script executed: #!/bin/bash
set -euo pipefail
echo '--- PR head and target ---'
git status --short
git branch --show-current
git log -1 --format='%H%n%s'
echo '--- Files changed by head commit ---'
git diff-tree --no-commit-id --name-status -r HEAD
echo '--- Head commit diff ---'
git diff --check HEAD^ HEAD
git diff --find-renames --find-copies HEAD^ HEAD -- .github/workflows/coverage.yml docs/decisions/776-backend-coverage.md
echo '--- Workflow and decision record relevant sections ---'
nl -ba .github/workflows/coverage.yml | sed -n '1,115p'
nl -ba docs/decisions/776-backend-coverage.md | sed -n '120,180p'
echo '--- Restore inputs declared by Dockerfile and drift guard references ---'
if [ -f Dockerfile ]; then
nl -ba Dockerfile | sed -n '1,220p'
fi
rg -n -C 4 --glob '!coverage-out/**' \
'Directory\.Packages\.props|packages\.lock\.json|restore input|restore.*input|COPY.*\.csproj' \
AGENTS.md .github Dockerfile tools 2>/dev/null || true
echo '--- Coverage workflow referenced paths exist ---'
for path in Directory.Packages.props .config/dotnet-tools.json tests/Directory.Build.props; do
test -e "$path" && printf 'exists: %s\n' "$path" || printf 'MISSING: %s\n' "$path"
done
find tests -path '*/packages.lock.json' -type f -print | sortLength of output: 36153
The workflow path filter now includes I also checked this against the existing 🧠 Learnings usedIf you found this review helpful, would you consider giving us a shout-out on X? Thank you for using CodeRabbit! You are interacting with an AI system. |
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Sep 12, 2026
…uests (#783) Skips `Image build + Trivy scan` and `Web typecheck, test, and build` on pull requests that change nothing but documentation. `Build and test` is untouched, because four of its guards are load-bearing on a markdown-only change. Closes #782 ## The question is inverted, on purpose The gate does not ask "which jobs does this change need". That is a hand-maintained list of what someone thought of, which is the shape `AGENTS.md`'s guard rules tell you to avoid. It asks **"does this pull request contain literally nothing but documentation"**, so a path nobody has classified is code by default and the full suite runs. That also resolves the issue's decision 3, which warned that deriving one shared trigger condition for both jobs would be the easy mistake. It would be, for a *positive* trigger set. For this predicate a single shared condition is correct by construction, because "contains nothing but documentation" is safe for both jobs at once. ## Fail-closed in one direction only A wrong `false` costs four minutes of runner time. A wrong `true` skips the image build and the Trivy scan on a change that needed them. So every failure path answers `false`: - The classify step short-circuits to `docs_only=false` on any event that is not `pull_request`, without consulting git. - It runs without `set -e`, and a git failure, a node failure or an unreadable stdin all land on `docs_only=false` with the step still green. - The jobs test `needs.changes.outputs.docs_only != 'true'`, not `== 'false'`. If the gate produces no output at all, the jobs run. - `!cancelled()` is what lets that condition be evaluated when the gate job itself failed. ## `publish` cannot be starved of an image `publish` declares `needs: [build-and-test, web, image]`, and per #351 a merge that produces no image leaves a release draft that can never be promoted. Two separate protections, because the first one alone was not enough: The gate never fires outside `pull_request`, so a push to `main` runs `web` and `image` exactly as before. And `changes` carries `continue-on-error: true`, because `publish`'s `if:` uses no status function and therefore carries an implicit `success()` over its whole ancestor chain — so a `changes` job that failed for any reason would have skipped `publish` on `main` even though `web` and `image` ran and passed. That hole was introduced by adding `needs: [changes]` and is closed by making the gate unable to fail. The classifier's self-tests therefore run in their own `classifier-self-test` job with no dependents, since a `continue-on-error` job cannot fail a run and a guard that cannot fail a run is not a guard. `ci.yml`'s diff is 134 added lines and **zero removed**. `publish`'s `needs` and `if:` are byte-identical. ## Three corrections found before this was pushed The diff went to an adversarial reviewer first, per the "Writing a guard" rule. It broke the first design in three places, each verified against the repository rather than accepted on argument. **`specs/**` is not documentation here.** `web/src/routes/helpGlossary.test.ts:23` reads `../specs/product/GLOSSARY.md` from disk and fails when a spec term is renamed out from under the in-app glossary (#657). That test runs in the `web` job, one of the two this gate skips, so a specs-only pull request would have skipped the guard written for specs-only pull requests. Carving out that single file would work today and fail silently the first time a second web test reads a second specs path, so the whole tree is code. **`--name-only` hides a rename's source.** `diff.renames` defaults to true, so `git mv src/Cluckwork.Domain/Common/Result.cs docs/Result.cs` arrives as the single path `docs/Result.cs` and classified as documentation while a source file was deleted. Measured on this repository, not reasoned about. `--no-renames` is now in the workflow, an end-to-end test performs that exact `git mv`, and a second test reads `ci.yml` and asserts the flag is on the classifying `git diff`, because the module and the workflow each held a copy of that contract. **The gate reopened the publish hazard**, covered above. ## Verification 16 `node:test` cases, and 13 mutations applied by script, run, and restored with a byte-identical diff check. Every mutation went red and every test went red under at least one. They include `every` to `some` (the "are any docs changed" bug the issue names), dropping the empty-list check, dropping the trailing slash so `docsomething/x.cs` matches `docs/`, letting any `*.md` count as root documentation, and removing `--no-renames` from `ci.yml`. One earlier mutation survived, and the code was fixed rather than the claim: the unreadable-stdin catch was unreachable through an async iterator, so the CLI now reads fd 0 with `readFileSync`. Against real history: PR #768 answers `true`, PR #779 answers `false` (it is the mixed case, carrying `AGENTS.md` and two `docs/` files beside lock files and tooling), and release PR #542 answers `false` because `version.txt` is not root markdown. Six of the seven documentation-only PRs the issue measured answer `true`; the seventh is #718, ten `graphify-out/` files, excluded deliberately. The push path was demonstrated rather than argued: the classify step's `run:` block was extracted from the parsed YAML and executed with the event name forced, and `push` and `workflow_dispatch` both write `docs_only=false` and exit 0 without touching git. ## One question the issue asked that could not be answered It named "establish which status checks are required" as the blocking first step. It could not be read: this repository has no rulesets and classic branch protection returns 403 for a personal access token. It turns out not to matter, and the decision record says why. A job skipped by `if:` reports as *skipped*, which satisfies a required check, whereas a workflow skipped by `on.pull_request.paths` leaves its check in `Expected` forever and blocks the merge. The mechanism chosen here is safe either way, so the unknown is dissolved rather than deferred. <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit - **CI Improvements** - Documentation-only pull requests now skip the web and image CI jobs, reducing validation time. - Changes are classified conservatively; ambiguous or failed detection continues to run the affected checks. - Build and test validation remains enabled for all changes. - **Documentation** - Added a decision record describing documentation-only pull request handling, its scope, and safeguards. - Updated the decisions index with the new record. - **Tests** - Added comprehensive coverage for documentation-change detection and CI behavior. <!-- end of auto-generated comment: release notes by coderabbit.ai --> --------- Co-authored-by: mforce <cleyva@clvc.net>
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Adds coverage measurement for the four backend test projects. Report only: there is no threshold, floor, or gate anywhere in this PR, which is #776's explicit instruction and the order
web/vite.config.tsfollowed for the SPA — measure first, decide whether to floor it later, from actuals.Closes #776
What lands
tools/coverage/collect.shbuilds once, runs each test project under coverlet, merges the per-project cobertura output through ReportGenerator into per-project and combined reports, and writescoverage-out/SUMMARY.md. The script is table-driven: oneROWSarray ofname|csproj|meaning, so a fifth test project is one row and nothing else.--project <name>runs one project alone for local iteration.tools/coverage/coverlet.runsettingscarries exactly one interpretive filter, the EF migrations exclusion. Everything else stays at coverlet's default deliberately, so this first measurement is untuned..github/workflows/coverage.ymlruns it Mondays at 05:00, onworkflow_dispatch, and on apull_requestscoped to the coverage tooling's own paths.ci.ymlis untouched.coverlet.collectoris versioned centrally per #684 with a bare reference intests/Directory.Build.props, and the ReportGenerator tool joins the existingdotnet-efmanifest entry. All fourpackages.lock.jsonfiles are regenerated in the same commit as the manifest change.First measurement, 2026-09-12
Integration's four assemblies split unevenly:
Cluckwork.Api92.3%/72.8%,Cluckwork.Application95.4%/81.7%,Cluckwork.Domain83.6%/66.2%,Cluckwork.Infrastructure94.9%/84.4%.Two readings these numbers invite, and both are wrong
The unit suites are not redundant, whatever the overlap says. Domain and Application together add 162 covered lines beyond what Integration and AppHost already reach, over an identical 16,896-line denominator. Read naively that says 781 unit tests are nearly free to delete. Coverage cannot tell a test that asserts a domain invariant from one that happens to execute the same line while asserting an HTTP status, and #771 already found three fully-covered guards that survived the exact mutations they were named for. The redundancy question needs mutation testing; this is not it, and the decision record says so.
Application's 13.9% is not "the Application layer is 14% tested." Integration measures
Cluckwork.Applicationat 95.4%. The 13.9% is what theApplication.Testsproject's own 290 tests, largely validators and architectural guards, reach across the three assemblies they incidentally touch.The three decisions #776 asked to be made explicitly
Per-project is the primary view and combined is secondary, because a single figure averages a unit-tested Domain against an end-to-end suite. Collection runs on a schedule rather than on every PR, because
Build and testis already the ~570s critical path that #775 exists to shorten. Integration's EXECUTED-not-ASSERTED caveat is printed in the report itself rather than left for a reader to infer. All three are recorded indocs/decisions/776-backend-coverage.md.The one filter, and how it was checked
src/Cluckwork.Infrastructure/Persistence/Migrationsis 39,088 of the 76,977 lines of C# undersrc/. It is EF-generated, #407 freezes it, and every integration test executes all of it on container boot regardless of what that test asserts, so including it would swamp the measurement in both directions.Verified against the run's output, not assumed from the config: the Integration report lists zero
*.Migrations.*classes, the raw cobertura XML contains zeroPersistence/Migrationspaths (so the exclusion drops files before cobertura records them, not just from the rendered report), and all 33 files in that directory are EF-generated — 16 timestamped migrations as.cs/.Designer.cspairs plusAppDbContextModelSnapshot.cs— so nothing hand-written was dropped.Reviewing this
The measurement reproduces:
tools/coverage/collect.sh, ortools/coverage/collect.sh --project Domainfor a fast single-project check. Thepull_requestpath filter means this PR runs the new workflow on itself, so the CI run here is the proof the tooling works rather than a description of it.ci.ymlis not modified and no security gate is touched. No user-visible behaviour changes, so no screenshots and no glossary or Help page update.Summary by CodeRabbit
New Features
CI/CD
Documentation