jest.config.js

/**
 * Two project setup:
 * - unit: existing tests for services + stores. Mocks react-native to an
 *   empty module so we can run pure-logic tests without the RN runtime.
 * - components: tests for `<Component>` files. Uses the jest-expo preset
 *   so React Native primitives (Text, Pressable, View, ActivityIndicator)
 *   render through @testing-library/react-native.
 */

const sharedTransform = {
  '^.+\\.tsx?$': [
    'babel-jest',
    {
      presets: [
        ['@babel/preset-env', { targets: { node: 'current' } }],
        '@babel/preset-typescript',
        ['@babel/preset-react', { runtime: 'automatic' }],
      ],
    },
  ],
};

const sharedNameMapper = {
  '^@/(.*)$': '<rootDir>/src/$1',
  '^@modules/(.*)$': '<rootDir>/modules/$1',
};

module.exports = {
  // Coverage scope is the logic surface only: services + stores. Screens and
  // feature UI are owned by component tests, visual regression and Maestro —
  // forcing line coverage on JSX produces useless render tests, not safety.
  // The floor is enforced by scripts/check-coverage-floor.mjs against the
  // committed .coverage-floor-lines file (see that script for the ratchet
  // protocol).
  collectCoverageFrom: [
    'src/services/**/*.{ts,tsx}',
    'src/store/**/*.{ts,tsx}',
    'src/features/**/services/**/*.{ts,tsx}',
    'src/hooks/**/*.{ts,tsx}',
    // Security-critical feature logic that lives outside a `services/` folder
    // but must still be measured (and is pinned in .coverage-floors.json).
    'src/features/biometric/biometric.ts',
    // Portfolio logic + screens (full-area coverage).
    'src/features/portfolio/useTotalPortfolioFiatFull.ts',
    'src/features/portfolio/useEnabledChains.ts',
    'src/features/portfolio/PortfolioScreenImpl.tsx',
    'src/features/portfolio/PortfolioAssetDetailScreenImpl.tsx',
    'src/features/portfolio/PortfolioManageScreenImpl.tsx',
    // Settings logic + screens (full-area coverage).
    'src/features/settings/SettingsScreenImpl.tsx',
    'src/features/settings/SeedExportScreenImpl.tsx',
    // Multi-Sig logic + screens (full-area coverage).
    'src/features/multi-sig/store.ts',
    'src/features/multi-sig/MultiSigSetupScreenImpl.tsx',
    'src/features/multi-sig/MultiSigManageScreenImpl.tsx',
    '!**/*.d.ts',
    '!**/types.ts',
  ],
  coverageReporters: ['json-summary', 'lcov', 'text-summary'],
  projects: [
    {
      displayName: 'unit',
      transform: sharedTransform,
      setupFiles: ['<rootDir>/test/setup-globals.ts'],
      testMatch: [
        '<rootDir>/test/services/**/*.test.ts',
        '<rootDir>/test/store/**/*.test.ts',
      ],
      moduleNameMapper: {
        ...sharedNameMapper,
        '^react-native-mmkv$': '<rootDir>/test/__mocks__/react-native-mmkv.ts',
        '^react-native$': '<rootDir>/test/__mocks__/empty.ts',
        '^react-native-nitro-modules$': '<rootDir>/test/__mocks__/empty.ts',
        '^react-native-ble-plx$': '<rootDir>/test/__mocks__/empty.ts',
        '^expo-secure-store$': '<rootDir>/test/__mocks__/expo-secure-store.ts',
        '^expo-crypto$': '<rootDir>/test/__mocks__/expo-crypto.ts',
        '^expo-local-authentication$': '<rootDir>/test/__mocks__/expo-local-authentication.ts',
        '^expo-haptics$': '<rootDir>/test/__mocks__/empty.ts',
        '^expo-clipboard$': '<rootDir>/test/__mocks__/empty.ts',
        '^expo-camera$': '<rootDir>/test/__mocks__/empty.ts',
        '^expo-localization$': '<rootDir>/test/__mocks__/empty.ts',
        '^react-native-qrcode-svg$': '<rootDir>/test/__mocks__/empty.ts',
        '^@tetherto/wdk-react-native-core$': '<rootDir>/test/__mocks__/wdk.ts',
        '^@tetherto/wdk-pricing-bitfinex-http$': '<rootDir>/test/__mocks__/empty.ts',
        '^@tetherto/wdk-pricing-provider$': '<rootDir>/test/__mocks__/empty.ts',
        '^bitbox-api$': '<rootDir>/test/__mocks__/empty.ts',
      },
    },
    {
      displayName: 'components',
      preset: 'jest-expo',
      transform: sharedTransform,
      testMatch: ['<rootDir>/test/components/**/*.test.tsx'],
      // Same global flag setup as the unit project: pin every
      // EXPO_PUBLIC_ENABLE_* to "true" before any feature wrapper loads,
      // so `FEATURES.X` resolves to the real implementation in the
      // components project's screen tests as well.
      setupFiles: ['<rootDir>/test/setup-globals.ts'],
      moduleNameMapper: {
        ...sharedNameMapper,
        // The WDK package ships TypeScript source on npm and Jest's transform
        // chain does not handle `export type {…}` inside node_modules without
        // help. The local mock under `test/__mocks__/wdk.ts` exposes the
        // surface our hooks touch (BaseAsset, useAccount, useRefreshBalance,
        // …) without dragging in the Bare worklet.
        '^@tetherto/wdk-react-native-core$': '<rootDir>/test/__mocks__/wdk.ts',
      },
      // jest-expo's defaults already cover react-native; add overrides for
      // wallet-specific dependencies that should not run their native bridge
      // during a pure component render test.
    },
  ],
};