GHCP -- Walk: Ex2 Build and Test Baseline (Coverage Surfacing)

[neha-p6]

Summary

• Added a ## Running Tests & Coverage Locally section to CONTRIBUTING.md with exact commands for both Go components and the Ruby/Omnibus suite — previously the file was a single-line redirect to another repo
• Extended ai-track-docs/build-test.md with a ## Coverage section: per-package baselines, annotated tables, and a PR Coverage Snippet Template for future PRs
• Added coverage.out and coverage.html to .gitignore (these were untracked build artifacts)
• Plan: survey test runners → run coverage locally → document commands + baselines → add PR snippet template → commit

Files/paths touched

• CONTRIBUTING.md
• ai-track-docs/build-test.md
• .gitignore

Evidence

# chef-automate-collect
$ cd components/chef-automate-collect
$ go test -cover -count=1 ./commands
ok  github.com/chef/chef-workstation/components/chef-automate-collect/commands  0.655s  coverage: 4.9% of statements

# main-chef-wrapper
$ cd components/main-chef-wrapper
$ go test -tags=unit -cover -count=1 ./cmd
ok  github.com/chef/chef-workstation/components/main-chef-wrapper/cmd  0.528s  coverage: 56.9% of statements

Coverage

Component	Package	Coverage	Baseline
chef-automate-collect	commands/	4.9%	established here
main-chef-wrapper	cmd/ (unit tag)	56.9%	established here
Ruby/Omnibus	spec/	≥ 79% (CI-enforced)	pre-existing CI threshold

chef-automate-collect coverage is intentionally low: command bodies invoke external HTTP/IO unreachable by unit tests. The covered surface is pure-logic (env-var constants, config struct parsing, error mapping).

Risk & Rollback

• Risk: low (doc + .gitignore only, no source code changed)
• Rollback: git revert c182adf9

Review Focus

• Verify coverage commands run cleanly on your machine
• Confirm the PR snippet template in build-test.md matches the format you want future PRs to use
• Reviewer can run: go test -tags=unit -cover -count=1 ./cmd from components/main-chef-wrapper

Track

• Level: Walk
• Exercise: Ex2