popiart-node-canvas/.planning/phases/18-api-route-tests/18-01-SUMMARY.md

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	issues-created	duration	completed
18-api-route-tests	1	testing	[vitest api-routes fs-mocking fetch-mocking next.js]	{phase 17-component-tests} {provides React Testing Library patterns and vitest configuration}	[API route testing patterns with fs/promises mocking NextRequest/NextResponse mocking patterns fetch mocking for HTTP URL handling Deduplication test patterns]	[18-02 18-03 18-04 18-05]	[{added []} {patterns [fs-mocking-with-factory-functions nextrequest-mocking]}]	[{created [src/app/api/workflow/__tests__/route.test.ts src/app/api/save-generation/__tests__/route.test.ts]} {modified []}]	[Use factory function pattern for vi.mock with named exports (mockStat, mockMkdir, etc.) Mock NextRequest with json() and nextUrl.searchParams helpers]	[fs mocking: Define mock functions at module scope, wire in vi.mock factory API route testing: Import POST/GET handlers directly, create mock request objects]	[]	4 min	2026-01-13

Phase 18 Plan 01: File I/O Routes Summary

API route tests for workflow and save-generation with fs/promises mocking patterns established

Performance

• Duration: 4 min
• Started: 2026-01-13T14:45:00Z
• Completed: 2026-01-13T14:49:00Z
• Tasks: 2
• Files modified: 2

Accomplishments

• Created 14 tests for workflow route (POST save, GET validation)
• Created 15 tests for save-generation route (save, deduplication, MIME types)
• Established fs/promises mocking pattern using factory functions
• Established fetch mocking for HTTP URL handling

Task Commits

Each task was committed atomically:

1. Task 1: Create workflow route tests - f7625ed (test)
2. Task 2: Create save-generation route tests - 17ee68c (test)

Plan metadata: (this commit)

Files Created/Modified

• src/app/api/workflow/__tests__/route.test.ts - 14 tests covering POST save and GET validation
• src/app/api/save-generation/__tests__/route.test.ts - 15 tests covering save, deduplication, validation

Decisions Made

• Used factory function pattern for vi.mock to define mock functions at module scope
• Mock NextRequest with json() and nextUrl.searchParams helpers rather than full request objects

Deviations from Plan

Auto-fixed Issues

1. [Rule 3 - Blocking] Fixed mocking pattern for vitest

• Found during: Task 1 (workflow route tests)
• Issue: vi.mocked(fs.stat).mockResolvedValue() failed - vitest auto-mocking doesn't expose mock functions directly
• Fix: Defined mock functions at module scope (const mockStat = vi.fn()) and wired them in vi.mock factory
• Files modified: src/app/api/workflow/tests/route.test.ts
• Verification: Tests pass with new mocking pattern
• Committed in: f7625ed

2. [Rule 3 - Blocking] Fixed missing matcher

• Found during: Task 2 (save-generation route tests)
• Issue: toEndWith() matcher not available in vitest/chai
• Fix: Used expect(data.filename.endsWith(".png")).toBe(true) instead
• Files modified: src/app/api/save-generation/tests/route.test.ts
• Verification: Tests pass with boolean assertion
• Committed in: 17ee68c

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Total deviations: 2 auto-fixed (2 blocking), 0 deferred Impact on plan: Both auto-fixes were necessary for tests to function. No scope creep.

Issues Encountered

None - plan executed successfully with blocking issues resolved inline.

Next Phase Readiness

• fs mocking pattern established for use in subsequent API route test plans
• fetch mocking pattern established for HTTP URL handling
• Ready for 18-02 (LLM route tests)

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Phase: 18-api-route-tests Completed: 2026-01-13