Tdd Workflow

describe('Semantic Search', () => {  it('returns relevant markets for query', async () => {    // Test implementation  })
  it('handles empty query gracefully', async () => {    // Test edge case  })
  it('falls back to substring search when Redis unavailable', async () => {    // Test fallback behavior  })
  it('sorts results by similarity score', async () => {    // Test sorting logic  })})

// Implementation guided by testsexport async function searchMarkets(query: string) {  // Implementation here}

import { render, screen, fireEvent } from '@testing-library/react'import { Button } from './Button'
describe('Button Component', () => {  it('renders with correct text', () => {    render(<Button>Click me</Button>)    expect(screen.getByText('Click me')).toBeInTheDocument()  })
  it('calls onClick when clicked', () => {    const handleClick = jest.fn()    render(<Button onClick={handleClick}>Click</Button>)
    fireEvent.click(screen.getByRole('button'))
    expect(handleClick).toHaveBeenCalledTimes(1)  })
  it('is disabled when disabled prop is true', () => {    render(<Button disabled>Click</Button>)    expect(screen.getByRole('button')).toBeDisabled()  })})

import { NextRequest } from 'next/server'import { GET } from './route'
describe('GET /api/markets', () => {  it('returns markets successfully', async () => {    const request = new NextRequest('http://localhost/api/markets')    const response = await GET(request)    const data = await response.json()
    expect(response.status).toBe(200)    expect(data.success).toBe(true)    expect(Array.isArray(data.data)).toBe(true)  })
  it('validates query parameters', async () => {    const request = new NextRequest('http://localhost/api/markets?limit=invalid')    const response = await GET(request)
    expect(response.status).toBe(400)  })
  it('handles database errors gracefully', async () => {    // Mock database failure    const request = new NextRequest('http://localhost/api/markets')    // Test error handling  })})

import { test, expect } from '@playwright/test'
test('user can search and filter markets', async ({ page }) => {  // Navigate to markets page  await page.goto('/')  await page.click('a[href="/markets"]')
  // Verify page loaded  await expect(page.locator('h1')).toContainText('Markets')
  // Search for markets  await page.fill('input[placeholder="Search markets"]', 'election')
  // Wait for debounce and results  await page.waitForTimeout(600)
  // Verify search results displayed  const results = page.locator('[data-testid="market-card"]')  await expect(results).toHaveCount(5, { timeout: 5000 })
  // Verify results contain search term  const firstResult = results.first()  await expect(firstResult).toContainText('election', { ignoreCase: true })
  // Filter by status  await page.click('button:has-text("Active")')
  // Verify filtered results  await expect(results).toHaveCount(3)})
test('user can create a new market', async ({ page }) => {  // Login first  await page.goto('/creator-dashboard')
  // Fill market creation form  await page.fill('input[name="name"]', 'Test Market')  await page.fill('textarea[name="description"]', 'Test description')  await page.fill('input[name="endDate"]', '2025-12-31')
  // Submit form  await page.click('button[type="submit"]')
  // Verify success message  await expect(page.locator('text=Market created successfully')).toBeVisible()
  // Verify redirect to market page  await expect(page).toHaveURL(/\/markets\/test-market/)})

jest.mock('@/lib/supabase', () => ({  supabase: {    from: jest.fn(() => ({      select: jest.fn(() => ({        eq: jest.fn(() => Promise.resolve({          data: [{ id: 1, name: 'Test Market' }],          error: null        }))      }))    }))  }}))

jest.mock('@/lib/redis', () => ({  searchMarketsByVector: jest.fn(() => Promise.resolve([    { slug: 'test-market', similarity_score: 0.95 }  ])),  checkRedisHealth: jest.fn(() => Promise.resolve({ connected: true }))}))

jest.mock('@/lib/openai', () => ({  generateEmbedding: jest.fn(() => Promise.resolve(    new Array(1536).fill(0.1) // Mock 1536-dim embedding  ))}))

// Don't test internal stateexpect(component.state.count).toBe(5)

// Test what users seeexpect(screen.getByText('Count: 5')).toBeInTheDocument()

// Breaks easilyawait page.click('.css-class-xyz')

// Resilient to changesawait page.click('button:has-text("Submit")')await page.click('[data-testid="submit-button"]')

// Tests depend on each othertest('creates user', () => { /* ... */ })test('updates same user', () => { /* depends on previous test */ })

// Each test sets up its own datatest('creates user', () => {  const user = createTestUser()  // Test logic})
test('updates user', () => {  const user = createTestUser()  // Update logic})