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| 1 | +# PR_26175_DELTA_009-replay-event-service-coverage |
| 2 | + |
| 3 | +## Summary |
| 4 | + |
| 5 | +Team Delta expanded replay and runtime event service coverage through the existing page/service-level runtime lane. |
| 6 | + |
| 7 | +This PR does not add a new npm command, does not add a new runner, and does not create any team-specific test command. It keeps `npm test` as the site-wide/all-tests command and expands `npm run test:service:runtime` from 21 targeted Node test files to 23 targeted Node test files. |
| 8 | + |
| 9 | +## Scope |
| 10 | + |
| 11 | +- Team: Delta |
| 12 | +- Branch: `PR_26175_DELTA_009-replay-event-service-coverage` |
| 13 | +- Changed file: `package.json` |
| 14 | +- Runtime code changed: none |
| 15 | +- UI changed: none |
| 16 | +- New test runner: none |
| 17 | +- Team-named command: none |
| 18 | + |
| 19 | +## Coverage Added |
| 20 | + |
| 21 | +The existing `test:service:runtime` lane now also covers: |
| 22 | + |
| 23 | +- `tests/replay/ReplayTimeline.test.mjs` |
| 24 | +- `tests/events/EventBus.test.mjs` |
| 25 | + |
| 26 | +These additions extend service-level coverage for replay timeline snapshot behavior and engine event bus subscription/emit behavior without duplicating existing tests. |
| 27 | + |
| 28 | +## Runtime Impact |
| 29 | + |
| 30 | +PASS - No runtime implementation files changed. This is a service-lane coverage expansion only. |
| 31 | + |
| 32 | +## Requirement Checklist |
| 33 | + |
| 34 | +| Requirement | Status | Notes | |
| 35 | +|---|---|---| |
| 36 | +| One PR purpose only | PASS | Replay and event service coverage expansion only. | |
| 37 | +| Team Delta ownership only | PASS | Replay, runtime, shared JS, API clients, event systems, and runtime test coverage are Delta-owned. | |
| 38 | +| Branch from updated main | PASS | Branch created after PR_006, PR_007, and PR_008 were merged and main sync passed. | |
| 39 | +| Expand replay and runtime event service coverage | PASS | Added replay timeline and event bus tests to `test:service:runtime`. | |
| 40 | +| Reuse existing service-level testing | PASS | Existing `test:service:runtime` lane expanded. | |
| 41 | +| Do not add new npm commands unless strictly necessary | PASS | No npm command added. | |
| 42 | +| Do not add a new runner | PASS | Reuses `scripts/run-node-test-files.mjs`. | |
| 43 | +| Do not create team-specific commands | PASS | No Delta-named npm command added. | |
| 44 | +| Do not duplicate existing tests | PASS | Existing test files are included once in the service lane. | |
| 45 | +| Keep `npm test` site-wide/all-tests | PASS | Existing `npm test` remains unchanged. | |
| 46 | +| No unrelated cleanup | PASS | Only `package.json` and required reports/artifacts changed. | |
| 47 | +| No UI changes | PASS | No UI files changed. | |
| 48 | +| No browser-owned product data | PASS | No browser persistence or project/runtime JSON contracts changed. | |
| 49 | +| No silent fallbacks or hidden defaults | PASS | No runtime behavior changed. | |
| 50 | + |
| 51 | +## Validation Lane Report |
| 52 | + |
| 53 | +| Command | Status | Notes | |
| 54 | +|---|---|---| |
| 55 | +| `npm run test:service:runtime` | PASS | 23/23 targeted Node test files passed. | |
| 56 | +| Governance guard | PASS | `npm test` unchanged; no `test:delta-runtime`; no Delta harness script; no Delta-named test command matches. | |
| 57 | +| `git diff --check` | PASS | No whitespace errors. | |
| 58 | + |
| 59 | +## Manual Validation Notes |
| 60 | + |
| 61 | +- Confirmed `npm test` still points to `node ./scripts/run-node-tests.mjs`. |
| 62 | +- Confirmed no `test:service:api` changes were made, so API validation was not required for this PR. |
| 63 | +- Confirmed no runtime implementation, UI, status bar, browser storage, or project/runtime JSON files were modified. |
| 64 | +- Confirmed `tests/events/EventBusNaming.test.mjs` was not added to the runtime service lane because it currently references missing historical `src/engine/events/index.js`; adding that broken historical test would make the lane fail and exceed this PR's coverage-only scope. |
| 65 | + |
| 66 | +## ZIP |
| 67 | + |
| 68 | +Repo-structured delta ZIP: |
| 69 | + |
| 70 | +`tmp/PR_26175_DELTA_009-replay-event-service-coverage_delta.zip` |
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