popiart-node-canvas/.planning/phases/18-api-route-tests/18-02-SUMMARY.md

phase: 18-api-route-tests plan: 02 subsystem: testing tags: [vitest, api-routes, llm, google-genai, openai, mocking] # Dependency graph requires: - phase: 18-01 provides: API route testing patterns with fs mocking provides: - LLM route tests for Google and OpenAI providers - @google/genai class mocking pattern with vi.hoisted - fetch mocking for OpenAI API calls affects: [18-03, 18-04] # Tech tracking tech-stack: added: [] patterns: [es6-class-mocking-with-hoisted, fetch-mocking-for-api] key-files: created: - src/app/api/llm/tests/route.test.ts modified: [] key-decisions: - "Use vi.hoisted() for ES6 class mocks that need to work with 'new' keyword" - "Mock global.fetch for external HTTP API calls (OpenAI)" patterns-established: - "ES6 class mocking: vi.hoisted() to define mock class, return from vi.mock factory" - "External API mocking: global.fetch with conditional responses per test" issues-created: [] # Metrics duration: 4 min completed: 2026-01-13

Phase 18 Plan 02: LLM Route Tests Summary

LLM API route tests for Google (18 tests) and OpenAI providers with ES6 class and fetch mocking

Performance

• Duration: 4 min
• Started: 2026-01-13T14:51:00Z
• Completed: 2026-01-13T14:55:00Z
• Tasks: 2
• Files modified: 1

Accomplishments

• Created 18 tests for /api/llm route covering both providers
• Established ES6 class mocking pattern using vi.hoisted() for GoogleGenAI
• Established fetch mocking pattern for OpenAI API calls
• Covered success, validation, rate limits, and API error paths

Task Commits

Each task was committed atomically:

1. Task 1: Create LLM route tests for Google provider - 6666b92 (test)
2. Task 2: Add LLM route tests for OpenAI provider - 8ba3a71 (test)

Plan metadata: (this commit)

Files Created/Modified

• src/app/api/llm/__tests__/route.test.ts - 18 tests covering Google and OpenAI providers

Decisions Made

• Used vi.hoisted() for ES6 class mocks to properly support instantiation with 'new'
• Mock global.fetch for OpenAI API calls rather than mocking fetch library

Deviations from Plan

Auto-fixed Issues

1. [Rule 3 - Blocking] Fixed ES6 class mock pattern

• Found during: Task 1 (Google provider tests)
• Issue: Initial mock using vi.fn() with factory function did not work with 'new' keyword
• Fix: Used vi.hoisted() to define proper ES6 class mock for GoogleGenAI
• Files modified: src/app/api/llm/tests/route.test.ts
• Verification: Tests pass with hoisted class mock
• Committed in: 6666b92

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Total deviations: 1 auto-fixed (1 blocking), 0 deferred Impact on plan: Auto-fix necessary for class mocking to work. No scope creep.

Issues Encountered

None - plan executed successfully.

Next Phase Readiness

• ES6 class mocking pattern established for Gemini SDK
• fetch mocking pattern ready for provider API calls
• Ready for 18-03 (Generate route Gemini tests)

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