---
date: 2025-12-20T18:26:11+00:00
researcher: Claude
git_commit: 86b0d3d803d1b53cb34f750b3145fcf64f7a8fb9
branch: refactor/ContentService
repository: Umbraco-CMS
topic: "ContentService Refactoring Phase 0 Implementation"
tags: [implementation, testing, benchmarks, contentservice, refactoring]
status: in_progress
last_updated: 2025-12-20
last_updated_by: Claude
type: implementation_strategy
---

# Handoff: ContentService Refactoring Phase 0 - Test Infrastructure

## Task(s)

Executing Phase 0 of ContentService refactoring using **Subagent-Driven Development** workflow. Phase 0 creates test and benchmark infrastructure to establish baseline metrics before refactoring begins.

**Implementation Plan:** `docs/plans/2025-12-20-contentservice-refactor-phase0-implementation.md`

### Task Status (12 total tasks):

| Task | Description | Status |
|------|-------------|--------|
| Task 0 | Commit ContentServiceBenchmarkBase.cs | ✅ Completed (was already committed) |
| Task 1 | Create ContentServiceRefactoringTests.cs skeleton | ✅ Completed (was already committed) |
| Task 2 | Add notification ordering tests (Tests 1-2) | ✅ Completed (both reviews passed) |
| Task 3 | Add sort operation tests (Tests 3-5) | ✅ Completed (both reviews passed) |
| Task 4 | Add DeleteOfType tests (Tests 6-8) | 🔲 Pending |
| Task 5 | Add permission tests (Tests 9-12) | 🔲 Pending |
| Task 6 | Add transaction boundary tests (Tests 13-15) | 🔲 Pending |
| Task 7 | Create ContentServiceRefactoringBenchmarks.cs | 🔲 Pending |
| Task 8 | Create ContentServiceBaseTests.cs | 🔲 Pending |
| Task 9 | Run all tests and verify | 🔲 Pending |
| Task 10 | Capture baseline benchmarks | 🔲 Pending |
| Task 11 | Final verification and summary | 🔲 Pending |

## Critical References

1. **Implementation Plan:** `docs/plans/2025-12-20-contentservice-refactor-phase0-implementation.md` - Contains exact test code to add for each task
2. **Subagent-Driven Development Skill:** `~/.claude/plugins/cache/superpowers-marketplace/superpowers/4.0.0/skills/subagent-driven-development/` - Workflow being followed

## Recent changes

- `tests/Umbraco.Tests.Integration/Umbraco.Infrastructure/Services/ContentServiceRefactoringTests.cs` - Added 5 tests (2 notification ordering, 3 sort operation)
- Commits made: `09cc4b022e` (Task 2 initial), amended with fixes, `86b0d3d803` (Task 3)

## Learnings

1. **Subagent-Driven Development Workflow:**
   - Dispatch implementer subagent with FULL task text from plan (don't make subagent read files)
   - Dispatch spec compliance reviewer to verify implementation matches spec exactly
   - If issues found, dispatch fix subagent, then re-review
   - Dispatch code quality reviewer only AFTER spec compliance passes
   - Mark task complete only when both reviews approve

2. **Test Patterns in Umbraco:**
   - Base class `UmbracoIntegrationTestWithContent` provides `Textpage`, `Subpage`, `Subpage2`, `Subpage3`
   - `Textpage` is NOT published by default - tests may need to publish parent before creating child content
   - Use `ContentBuilder.CreateSimpleContent()` to create fresh test content
   - Use `RefactoringTestNotificationHandler.Reset()` before testing notifications

3. **Spec Compliance:**
   - First implementation of Task 2 deviated from spec (used fixtures instead of creating content)
   - Reviewer caught this and fix was applied successfully
   - Lesson: Spec reviewer is critical for catching deviations

## Artifacts

- `tests/Umbraco.Tests.Integration/Testing/ContentServiceBenchmarkBase.cs` - Benchmark base class (committed in Task 0)
- `tests/Umbraco.Tests.Integration/Umbraco.Infrastructure/Services/ContentServiceRefactoringTests.cs` - Integration tests (Tasks 1-3)
- `docs/plans/2025-12-20-contentservice-refactor-phase0-implementation.md` - Full implementation plan with code

## Action Items & Next Steps

Resume using subagent-driven development workflow:

1. **Task 4: Add DeleteOfType tests (Tests 6-8)**
   - Dispatch implementer subagent with Task 4 from plan (lines 684-863)
   - After implementation, dispatch spec reviewer
   - After spec approval, dispatch code quality reviewer
   - Mark complete when approved

2. **Task 5: Add permission tests (Tests 9-12)**
   - Same workflow as Task 4
   - Plan lines 866-1059

3. **Task 6: Add transaction boundary tests (Tests 13-15)**
   - Same workflow
   - Plan lines 1063-1228

4. **Task 7: Create ContentServiceRefactoringBenchmarks.cs**
   - Large file (33 benchmarks) - may take longer
   - Plan lines 1231-2386

5. **Task 8: Create ContentServiceBaseTests.cs**
   - Unit tests (skeleton with tracking test)
   - Plan lines 2389-2657

6. **Tasks 9-11: Verification and baseline capture**
   - Run all tests, capture benchmarks, create git tag

## Other Notes

- The implementation plan has gone through 3 critical reviews (v1.1, v1.2, v1.3) - all feedback has been incorporated
- Key revision notes are at the top of the plan document
- Benchmark data sizes are standardized to 10/100/1000 pattern (v1.2)
- Warmup logic was corrected for both destructive and non-destructive benchmarks
- `ContentServiceBase` doesn't exist yet - Task 8 creates tracking test that fails when it's created in Phase 1