---
phase: 18-api-route-tests
plan: 03
subsystem: testing
tags: [vitest, api-routes, generate, gemini, image-generation]

# Dependency graph
requires:
  - phase: 18-02
    provides: ES6 class mocking pattern with vi.hoisted for GoogleGenAI
provides:
  - Generate route tests for Gemini provider (31 tests)
  - Image generation API testing patterns
  - Config option testing (aspectRatio, resolution, googleSearch)
affects: [18-04]

# Tech tracking
tech-stack:
  added: []
  patterns: [gemini-generate-content-mocking, image-response-testing]

key-files:
  created:
    - src/app/api/generate/__tests__/route.test.ts
  modified: []

key-decisions:
  - "Focus on Gemini path only - Replicate/fal.ai tested in 18-04"
  - "Test model mapping (nano-banana -> gemini-2.5-flash-preview-image-generation)"

patterns-established:
  - "Image generation response mocking with inlineData structure"
  - "Config option testing (aspectRatio, resolution, googleSearch)"

issues-created: []

# Metrics
duration: 5 min
completed: 2026-01-13
---

# Phase 18 Plan 03: Generate Route Gemini Tests Summary

**Gemini image generation API tests (31 tests) covering success, config options, validation, and error paths**

## Performance

- **Duration:** 5 min
- **Started:** 2026-01-13T14:58:00Z
- **Completed:** 2026-01-13T15:03:00Z
- **Tasks:** 2
- **Files modified:** 1

## Accomplishments
- Created 31 tests for /api/generate route Gemini path
- Tested all config options (aspectRatio, resolution, googleSearch)
- Covered input validation (prompt, images, dynamicInputs)
- Tested provider routing and model mapping
- Covered error cases (missing key, rate limits, no candidates)

## Task Commits

Each task was committed atomically:

1. **Task 1: Create generate route tests for Gemini provider** - `8ae14b4` (test)
2. **Task 2: Add generate route validation and edge case tests** - `55d95fe` (test)

**Plan metadata:** (this commit)

## Files Created/Modified
- `src/app/api/generate/__tests__/route.test.ts` - 31 tests covering Gemini provider path

## Decisions Made
- Focused on Gemini path only, leaving Replicate/fal.ai for 18-04
- Tested model mapping (nano-banana → gemini-2.5-flash-preview-image-generation)

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
None - plan executed successfully.

## Next Phase Readiness
- Gemini generation testing complete
- Generate route test file ready for Replicate/fal.ai additions in 18-04
- Ready for 18-04 (Generate route Replicate/fal.ai tests)

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