// jest.config.js
module.exports = {
  collectCoverageFrom: [
    'src/**/*.{js,jsx,ts,tsx}',
    '!src/**/*.d.ts',
    '!src/**/*.stories.{js,jsx,ts,tsx}',
    '!src/**/index.{js,ts}' // Re-exports only
  ],
  coverageThreshold: {
    global: {
      branches: 70,
      functions: 80,
      lines: 80,
      statements: 80
    },
    // Stricter thresholds for critical code
    './src/utils/': {
      branches: 90,
      functions: 95,
      lines: 95,
      statements: 95
    }
  },
  coverageReporters: ['text', 'lcov', 'html']
}

// vitest.config.ts
import { defineConfig } from 'vitest/config'
 
export default defineConfig({
  test: {
    coverage: {
      provider: 'v8',
      reporter: ['text', 'json', 'html'],
      thresholds: {
        lines: 80,
        branches: 70,
        functions: 80,
        statements: 80
      },
      exclude: [
        'node_modules/',
        'test/',
        '**/*.d.ts',
        '**/*.config.{js,ts}'
      ]
    }
  }
})

name: Tests
on: [push, pull_request]
 
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
      - run: npm ci
      - run: npm test -- --coverage --coverageReporters=text-lcov > coverage.lcov
 
      # Upload to Codecov
      - uses: codecov/codecov-action@v4
        with:
          files: ./coverage.lcov
          fail_ci_if_error: true
 
      # Or upload to Coveralls
      - uses: coverallsapp/github-action@v2
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}

// ✅ Good: Test behavior, not just lines
test('validates email format', () => {
  expect(isValidEmail('user@example.com')).toBe(true)
  expect(isValidEmail('invalid')).toBe(false)
  expect(isValidEmail('')).toBe(false)
  expect(isValidEmail('user@.com')).toBe(false)
})
 
// ❌ Bad: Just hitting lines without meaningful assertions
test('calls isValidEmail', () => {
  isValidEmail('test@test.com')
  // No assertions!
})

// jest.config.js
collectCoverageFrom: [
  'src/**/*.{ts,tsx}',
  '!src/**/*.generated.ts',
  '!src/graphql/types.ts',
  '!src/**/__mocks__/**'
]