[8.19] Scout: enable Selective testing in Pull Requests (#261510)#263016
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dmlemeshko merged 2 commits intoelastic:8.19from Apr 14, 2026
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[8.19] Scout: enable Selective testing in Pull Requests (#261510)#263016dmlemeshko merged 2 commits intoelastic:8.19from
dmlemeshko merged 2 commits intoelastic:8.19from
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## Summary Closes elastic/appex-qa-team#700 This PR enables Scout selective testing as a _default test execution for every PR targeting tracked branch_ (e.g. `main`). ### What selective testing means for kibana-contributors? - When a PR build runs, `list_affected` uses git diff against the merge base to find which `@kbn/` modules have changed files (including downstream dependents) This produces a JSON array of affected module IDs. - Scout CLI uses this file to find all the matching test configs: each Scout module's config path is resolved to its `@kbn/` ID via `kibana.jsonc`. Scout config discovery filters down to only the affected modules — so CI only creates Buildkite steps for Scout tests belonging to changed modules (packages and plugins) - PR builds run only the Scout tests scoped to the changed modules, cutting wall-to-wall build time. **Critical files bypass** A new `resolve_selective_testing.ts` script runs before config discovery. In a single git invocation it: 1. Computes the affected modules and writes the JSON file consumed by `discover-playwright-configs`. 2. Checks whether any critical Scout files were touched (e.g. package.json, yarn.lock, Scout runtime packages, the CI pipeline scripts themselves) using touchedCriticalFiles against a new `CRITICAL_FILES_SCOUT` constant — following the same pattern already used for Jest unit and integration tests. If critical files are detected, selective testing is bypassed and the full suite runs. The affected-module labels on Buildkite steps are always applied regardless, since `--affected-modules` is passed unconditionally and `--selective-testing` is a separate flag. <img width="1833" height="665" alt="Screenshot 2026-04-07 at 14 17 28" src="https://github.com/user-attachments/assets/918ad0f8-28c4-471d-93fe-577264cf85f1" /> **Note**: The `scout:run-all-tests` label enforces the full test matrix while still showing which modules were affected. --------- Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com> (cherry picked from commit b3c3317) # Conflicts: # .buildkite/pipeline-utils/affected-packages/const.ts
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dolaru
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Apr 14, 2026
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