[9.3] Scout: enable Selective testing in Pull Requests (#261510)#262959
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dmlemeshko merged 1 commit intoelastic:9.3from Apr 14, 2026
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[9.3] Scout: enable Selective testing in Pull Requests (#261510)#262959dmlemeshko merged 1 commit intoelastic:9.3from
dmlemeshko merged 1 commit intoelastic:9.3from
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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)
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…3086) # Backport This will backport the following commits from `main` to `9.2`: - [Scout: enable Selective testing in Pull Requests (#261510)](#261510) <!--- Backport version: 10.2.0 --> ### Questions ? Please refer to the [Backport tool documentation](https://github.com/sorenlouv/backport) <!--BACKPORT [{"author":{"name":"Dzmitry Lemechko","email":"dzmitry.lemechko@elastic.co"},"sourceCommit":{"committedDate":"2026-04-14T07:51:52Z","message":"Scout: enable Selective testing in Pull Requests (#261510)\n\n## Summary\n\nCloses https://github.com/elastic/appex-qa-team/issues/700\n\nThis PR enables Scout selective testing as a _default test execution for\nevery PR targeting tracked branch_ (e.g. `main`).\n\n### What selective testing means for kibana-contributors?\n\n- When a PR build runs, `list_affected` uses git diff against the merge\nbase to find which `@kbn/` modules have changed files (including\ndownstream dependents) This produces a JSON array of affected module\nIDs.\n\n- Scout CLI uses this file to find all the matching test configs: each\nScout module's config path is resolved to its `@kbn/` ID via\n`kibana.jsonc`. Scout config discovery filters down to only the affected\nmodules — so CI only creates Buildkite steps for Scout tests belonging\nto changed modules (packages and plugins)\n\n- PR builds run only the Scout tests scoped to the changed modules,\ncutting wall-to-wall build time.\n\n**Critical files bypass**\nA new `resolve_selective_testing.ts` script runs before config\ndiscovery. In a single git invocation it:\n\n1. Computes the affected modules and writes the JSON file consumed by\n`discover-playwright-configs`.\n2. Checks whether any critical Scout files were touched (e.g.\npackage.json, yarn.lock, Scout runtime packages, the CI pipeline scripts\nthemselves) using touchedCriticalFiles against a new\n`CRITICAL_FILES_SCOUT` constant — following the same pattern already\nused for Jest unit and integration tests.\n\nIf critical files are detected, selective testing is bypassed and the\nfull suite runs. The affected-module labels on Buildkite steps are\nalways applied regardless, since `--affected-modules` is passed\nunconditionally and `--selective-testing` is a separate flag.\n\n\n\n<img width=\"1833\" height=\"665\" alt=\"Screenshot 2026-04-07 at 14 17 28\"\nsrc=\"https://github.com/user-attachments/assets/918ad0f8-28c4-471d-93fe-577264cf85f1\"\n/>\n\n\n**Note**: The `scout:run-all-tests` label enforces the full test matrix\nwhile still showing which modules were affected.\n\n---------\n\nCo-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>","sha":"b3c331750e67222a9c0f48f15f2b829d9c71e28e","branchLabelMapping":{"^v9.5.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:QA","release_note:skip","backport:all-open","test:scout","v9.4.0","v9.5.0","v9.3.4"],"title":"Scout: enable Selective testing in Pull Requests","number":261510,"url":"https://github.com/elastic/kibana/pull/261510","mergeCommit":{"message":"Scout: enable Selective testing in Pull Requests (#261510)\n\n## Summary\n\nCloses https://github.com/elastic/appex-qa-team/issues/700\n\nThis PR enables Scout selective testing as a _default test execution for\nevery PR targeting tracked branch_ (e.g. `main`).\n\n### What selective testing means for kibana-contributors?\n\n- When a PR build runs, `list_affected` uses git diff against the merge\nbase to find which `@kbn/` modules have changed files (including\ndownstream dependents) This produces a JSON array of affected module\nIDs.\n\n- Scout CLI uses this file to find all the matching test configs: each\nScout module's config path is resolved to its `@kbn/` ID via\n`kibana.jsonc`. Scout config discovery filters down to only the affected\nmodules — so CI only creates Buildkite steps for Scout tests belonging\nto changed modules (packages and plugins)\n\n- PR builds run only the Scout tests scoped to the changed modules,\ncutting wall-to-wall build time.\n\n**Critical files bypass**\nA new `resolve_selective_testing.ts` script runs before config\ndiscovery. In a single git invocation it:\n\n1. Computes the affected modules and writes the JSON file consumed by\n`discover-playwright-configs`.\n2. Checks whether any critical Scout files were touched (e.g.\npackage.json, yarn.lock, Scout runtime packages, the CI pipeline scripts\nthemselves) using touchedCriticalFiles against a new\n`CRITICAL_FILES_SCOUT` constant — following the same pattern already\nused for Jest unit and integration tests.\n\nIf critical files are detected, selective testing is bypassed and the\nfull suite runs. The affected-module labels on Buildkite steps are\nalways applied regardless, since `--affected-modules` is passed\nunconditionally and `--selective-testing` is a separate flag.\n\n\n\n<img width=\"1833\" height=\"665\" alt=\"Screenshot 2026-04-07 at 14 17 28\"\nsrc=\"https://github.com/user-attachments/assets/918ad0f8-28c4-471d-93fe-577264cf85f1\"\n/>\n\n\n**Note**: The `scout:run-all-tests` label enforces the full test matrix\nwhile still showing which modules were affected.\n\n---------\n\nCo-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>","sha":"b3c331750e67222a9c0f48f15f2b829d9c71e28e"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"9.4","label":"v9.4.0","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"url":"https://github.com/elastic/kibana/pull/262960","number":262960,"state":"MERGED","mergeCommit":{"sha":"f6504aed0dc507f3e7efbea70c9d52ab81771bbe","message":"[9.4] Scout: enable Selective testing in Pull Requests (#261510) (#262960)\n\n# Backport\n\nThis will backport the following commits from `main` to `9.4`:\n- [Scout: enable Selective testing in Pull Requests\n(#261510)](https://github.com/elastic/kibana/pull/261510)\n\n\n\n### Questions ?\nPlease refer to the [Backport tool\ndocumentation](https://github.com/sorenlouv/backport)\n\n\n\nCo-authored-by: Dzmitry Lemechko <dzmitry.lemechko@elastic.co>"}},{"branch":"main","label":"v9.5.0","branchLabelMappingKey":"^v9.5.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/261510","number":261510,"mergeCommit":{"message":"Scout: enable Selective testing in Pull Requests (#261510)\n\n## Summary\n\nCloses https://github.com/elastic/appex-qa-team/issues/700\n\nThis PR enables Scout selective testing as a _default test execution for\nevery PR targeting tracked branch_ (e.g. `main`).\n\n### What selective testing means for kibana-contributors?\n\n- When a PR build runs, `list_affected` uses git diff against the merge\nbase to find which `@kbn/` modules have changed files (including\ndownstream dependents) This produces a JSON array of affected module\nIDs.\n\n- Scout CLI uses this file to find all the matching test configs: each\nScout module's config path is resolved to its `@kbn/` ID via\n`kibana.jsonc`. Scout config discovery filters down to only the affected\nmodules — so CI only creates Buildkite steps for Scout tests belonging\nto changed modules (packages and plugins)\n\n- PR builds run only the Scout tests scoped to the changed modules,\ncutting wall-to-wall build time.\n\n**Critical files bypass**\nA new `resolve_selective_testing.ts` script runs before config\ndiscovery. In a single git invocation it:\n\n1. Computes the affected modules and writes the JSON file consumed by\n`discover-playwright-configs`.\n2. Checks whether any critical Scout files were touched (e.g.\npackage.json, yarn.lock, Scout runtime packages, the CI pipeline scripts\nthemselves) using touchedCriticalFiles against a new\n`CRITICAL_FILES_SCOUT` constant — following the same pattern already\nused for Jest unit and integration tests.\n\nIf critical files are detected, selective testing is bypassed and the\nfull suite runs. The affected-module labels on Buildkite steps are\nalways applied regardless, since `--affected-modules` is passed\nunconditionally and `--selective-testing` is a separate flag.\n\n\n\n<img width=\"1833\" height=\"665\" alt=\"Screenshot 2026-04-07 at 14 17 28\"\nsrc=\"https://github.com/user-attachments/assets/918ad0f8-28c4-471d-93fe-577264cf85f1\"\n/>\n\n\n**Note**: The `scout:run-all-tests` label enforces the full test matrix\nwhile still showing which modules were affected.\n\n---------\n\nCo-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>","sha":"b3c331750e67222a9c0f48f15f2b829d9c71e28e"}},{"branch":"9.3","label":"v9.3.4","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"url":"https://github.com/elastic/kibana/pull/262959","number":262959,"state":"MERGED","mergeCommit":{"sha":"454c1dff03f1fd64247bff4e457bd6b332914018","message":"[9.3] Scout: enable Selective testing in Pull Requests (#261510) (#262959)\n\n# Backport\n\nThis will backport the following commits from `main` to `9.3`:\n- [Scout: enable Selective testing in Pull Requests\n(#261510)](https://github.com/elastic/kibana/pull/261510)\n\n\n\n### Questions ?\nPlease refer to the [Backport tool\ndocumentation](https://github.com/sorenlouv/backport)\n\n\n\nCo-authored-by: Dzmitry Lemechko <dzmitry.lemechko@elastic.co>"}},{"url":"https://github.com/elastic/kibana/pull/263016","number":263016,"branch":"8.19","state":"OPEN"}]}] BACKPORT-->
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Backport
This will backport the following commits from
mainto9.3:Questions ?
Please refer to the Backport tool documentation