jest.config.js

/* Copyright (c) 2023 The Brave Authors. All rights reserved.
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at https://mozilla.org/MPL/2.0/. */

// For a detailed explanation regarding each configuration property, visit:
// https://jestjs.io/docs/en/configuration.html

const fs = require('fs')

const crossPlatforms = ['mac', 'win']
const buildConfigs = ['Component', 'Static', 'Debug', 'Release']
const extraArchitectures = ['arm64', 'x86']

function getBuildOutputPathList(buildOutputRelativePath) {
  return buildConfigs.reduce((outDirs, outDir) =>
    [...outDirs, outDir, ...crossPlatforms.map(platform => `${platform}_${outDir}`)],
  []).reduce((outDirs, outDir) =>
    [...outDirs, outDir, ...extraArchitectures.map(arch => `${outDir}_${arch}`)],
  []).map(outDir =>
    `<rootDir>/../out/${outDir}/${buildOutputRelativePath}`
  )
}

function getReporters() {
  if (process.env.TEAMCITY_VERSION !== undefined) {
    return [
      [
        '<rootDir>/tools/jest_teamcity_reporter/jest_teamcity_reporter.js',
        { 'suiteName': 'test-unit' }
      ]
    ]
  } else {
    return ['default']
  }
}

function getBuildConfig() {
  // Try to find the build config in any of the possible build directories
  const possiblePaths = getBuildOutputPathList(
    'gen/brave/build_flags.json'
  )

  for (const configPath of possiblePaths) {
    // Remove <rootDir> placeholder and resolve the actual path
    const actualPath = configPath.replace('<rootDir>', __dirname)
    if (fs.existsSync(actualPath)) {
      try {
        return JSON.parse(fs.readFileSync(actualPath, 'utf8'))
      } catch (e) {
        // Continue to next path
      }
    }
  }

  // Default to all features enabled if no config found
  return {
    enable_ai_chat: true,
    enable_brave_wallet: true
  }
}

const buildConfig = getBuildConfig()

/**
 * @type {import('@jest/types').Config.InitialOptions}
 */
module.exports = {
  preset: 'ts-jest/presets/default',
  testEnvironment: '<rootDir>/components/test/testEnvironment.js',
  moduleFileExtensions: ['js', 'tsx', 'ts', 'json'],
  globals: {
    'ts-jest': {
      'tsconfig': 'tsconfig-jest.json',
      'isolatedModules': true,
      useESM: true
    }
  },
  transform: {
    '\\.(jsx|js|ts|tsx)$': 'ts-jest'
  },
  reporters: getReporters(),
  clearMocks: true,
  resetMocks: true,
  resetModules: true,
  coverageProvider: 'v8',
  collectCoverageFrom: [
    '<rootDir>/build/commands/lib/*',
    '<rootDir>/components/**/**/*.ts',
    '<rootDir>/components/**/**/*.tsx',
    '!<rootDir>/components/definitions/*',
    '!<rootDir>/components/**/constants/*',
    '!<rootDir>/components/**/reducers/index.ts',
    '!<rootDir>/components/**/store.ts',
    '!<rootDir>/components/test/*',
    '!<rootDir>/build/commands/lib/start.js',
    '!<rootDir>/build/commands/lib/jsconfig.json'
  ],
  testURL: 'http://localhost/',
  testMatch: [
    '<rootDir>/**/*.test.{js,ts,tsx}',
    '<rootDir>/components/test/**/*_test.{ts,tsx}'
  ],
  testPathIgnorePatterns: [
    '<rootDir>/build/commands/lib/test.js',
    '<rootDir>/build/rustup',
    '<rootDir>/third_party',
    '<rootDir>/tools/crates/vendor',
    ...(buildConfig.enable_ai_chat ? [] : ['<rootDir>/components/ai_chat']),
    ...(buildConfig.enable_brave_wallet
      ? []
      : ['<rootDir>/components/brave_wallet_ui'])
  ],
  testTimeout: 30000,
  transformIgnorePatterns: [
    '<rootDir>/node_modules/(?!.*/)',
    // prevent jest from transforming itself
    // https://github.com/jestjs/jest/issues/9503#issuecomment-709041807
    '<rootDir>/node_modules/@babel',
    '<rootDir>/node_modules/@jest',
    '<rootDir>/node_modules/jest-runtime',
    '<rootDir>/node_modules/lodash',
    'signal-exit',
    'is-typedarray'
  ],
  setupFilesAfterEnv: ['<rootDir>/components/test/testSetup.ts'],
  moduleNameMapper: {
    '\\.(jpg|jpeg|png|gif|eot|otf|svg|ttf|woff|woff2)$':
      '<rootDir>/components/test/fileMock.ts',
    '\\.(css|less|scss)$': 'identity-obj-proxy',
    '^\\$web-common\\/(.*)': '<rootDir>/components/common/$1',
    '^brave-ui$': '<rootDir>/node_modules/@brave/brave-ui',
    '^brave-ui\\/(.*)': '<rootDir>/node_modules/@brave/brave-ui/$1',
    '^\\$test-utils\\/(.*)': '<rootDir>/components/test/$1',

    // mocks for brave-wallet and brave-rewards proxies
    '\\/brave_rewards_api_proxy$':
      '<rootDir>/components/brave_wallet_ui/' +
      'common/async/__mocks__/brave_rewards_api_proxy.ts',
    '\\/bridge$':
      '<rootDir>/components/brave_wallet_ui/common/async/__mocks__/bridge.ts',

    // TODO(petemill): The ordering here can get problematic for devs
    // who have more than 1 build type at a time, since if the file exists
    // at the first path, it will be used for Type analysis instead of the second
    // path, even if it's more recent.
    // It can also break if CI or devs perform a build in a directory not known
    // by this list.
    // Instead, we should get the directory from config.js:outputDir.
    '^gen\\/(.*)': getBuildOutputPathList('gen/$1'),
    'chrome://resources\\/(.*)': getBuildOutputPathList(
      'gen/ui/webui/resources/tsc/$1'
    ),
    'chrome://interstitials\\/(.*)': getBuildOutputPathList(
      'gen/components/security_interstitials/core/$1'
    ),
    // workaround for https://github.com/LedgerHQ/ledger-live/issues/763
    '@ledgerhq/devices/hid-framing':
      '<rootDir>/node_modules/@ledgerhq/devices/lib/hid-framing'
  }
}