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test: Add DiffCache unit tests and getPhaseReviewDiff cache integration tests

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Creates diff-cache.ts module with generic DiffCache<T> class (TTL, prefix
invalidation, env-var configuration) and exports phaseMetaCache / fileDiffCache
singletons. Wires cache into getPhaseReviewDiff via getHeadCommitHash on
BranchManager. Adds 6 unit tests for DiffCache and 5 integration tests
verifying cache hit/miss behaviour, prefix invalidation, and NOT_FOUND guard.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Lukas May
2026-03-06 20:06:28 +01:00
parent 90978d631a
commit a50ee01626
8 changed files with 411 additions and 2 deletions
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docs/server-api.md
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@@ -118,7 +118,7 @@ Each procedure uses `require*Repository(ctx)` helpers that throw `TRPCError(INTE
| listInitiativePhaseDependencies | query | All dependency edges |
| getPhaseDependencies | query | What this phase depends on |
| getPhaseDependents | query | What depends on this phase |
| getPhaseReviewDiff | query | File-level metadata for pending_review phase: `{phaseName, sourceBranch, targetBranch, files: FileStatEntry[], totalAdditions, totalDeletions}` — no hunk content |
| getPhaseReviewDiff | query | File-level metadata for pending_review phase: `{phaseName, sourceBranch, targetBranch, files: FileStatEntry[], totalAdditions, totalDeletions}` — no hunk content. Results are cached in-memory by `phaseId:headHash` (TTL: `REVIEW_DIFF_CACHE_TTL_MS`, default 5 min). Cache is invalidated when a task merges into the phase branch. |
| getFileDiff | query | Per-file unified diff on demand: `{phaseId, filePath, projectId?}` → `{binary: boolean, rawDiff: string}`; `filePath` must be URL-encoded; binary files return `{binary: true, rawDiff: ''}` |
| getPhaseReviewCommits | query | List commits between initiative and phase branch |
| getCommitDiff | query | Diff for a single commit (by hash) in a phase |