gen-test

name	gen-test
description	Generate vitest unit and integration tests for FlightGuard MPP source files. Covers pure data transformations, HTTP endpoints, and known bugs.

Generate vitest tests for the file(s) or module specified in $ARGUMENTS.

Project Test Setup

If vitest is not yet installed, add it first:

npm install -D vitest @types/supertest supertest

Add to package.json scripts:

{
  "test": "vitest run",
  "test:watch": "vitest",
  "test:coverage": "vitest run --coverage"
}

Testing Priorities (in order)

1. src/flight.ts — Pure data transformations (start here)

• normalizeFlightInfo() — test with fixtures of raw AeroDataBox responses
• KNOWN BUG regression test: arrival.actualTime at lines 121-125 was reading from scheduledTime fields instead of actualTime. Write a regression test: provide a raw flight where arrival.actualTime differs from arrival.scheduledTime and assert the normalized result uses actualTime values.
• getDepartureDelayMinutes(), hasFlightDeparted(), isFlightTerminal(), getScheduledDepartureUtc()

2. src/store.ts — In-memory store CRUD (no mocks needed)

• Create, get, update, list policies
• Filter by status

3. src/checker.ts — Policy evaluation logic

• Mock fetchFlightInfo with vi.mock('../flight.js')
• Test delay threshold boundary conditions (59 min → no payout, 60 min → payout)
• Test expired policy handling

4. HTTP endpoints via supertest

• POST /insure — valid and invalid inputs
• GET /policy/:id — found and not found
• GET /health — response shape

Mocking Patterns

import { vi } from 'vitest'

// Mock AeroDataBox HTTP calls
vi.mock('../flight.js', () => ({
  fetchFlightInfo: vi.fn(),
}))

// Mock viem for payout tests
vi.mock('viem', () => ({
  createWalletClient: vi.fn(() => ({ writeContract: vi.fn() })),
  createPublicClient: vi.fn(() => ({ readContract: vi.fn() })),
}))

AeroDataBox Fixture Template

const rawFlight = {
  number: 'AA123',
  status: 'Landed',
  departure: {
    scheduledTime: { local: '2026-03-21T10:00:00', utc: '2026-03-21T15:00:00Z' },
    actualTime: { local: '2026-03-21T11:05:00', utc: '2026-03-21T16:05:00Z' },
    delays: [{ minutes: 65, reason: 'Weather' }],
    airport: { iata: 'JFK', name: 'John F. Kennedy' },
  },
  arrival: {
    scheduledTime: { local: '2026-03-21T14:00:00', utc: '2026-03-21T19:00:00Z' },
    actualTime: { local: '2026-03-21T15:10:00', utc: '2026-03-21T20:10:00Z' },
    airport: { iata: 'LAX', name: 'Los Angeles International' },
  },
}