wallaby.js

module.exports = function (wallaby) {
  var path = require('path')
  process.env.BABEL_ENV = 'test'
  process.env.NODE_ENV = 'test'
  process.env.NODE_PATH +=
    path.delimiter +
    path.join(__dirname, 'node_modules') +
    path.delimiter +
    path.join(__dirname, 'node_modules/react-scripts/node_modules') +
    path.delimiter +
    path.join(wallaby.projectCacheDir, 'src')

  require('module').Module._initPaths()

  return {
    files: [
      { pattern: 'src/setupTests.ts', instrument: false },
      'src/**/*.+(ts|tsx|jsx|json|snap|css|less|sass|scss|jpg|jpeg|gif|png|svg)',
      '!src/**/*.test.ts?(x)',
      '!src/**/*.spec.ts?(x)',
    ],
    filesWithNoCoverageCalculated: [
      'src/serviceWorker.ts',
      'src/reportWebVitals.ts',
      'src/index.tsx',
      'src/model/interfaces/**.*ts',
    ],

    tests: ['src/**/*.test.ts?(x)', 'src/**/*.spec.ts?(x)'],

    env: {
      type: 'node',
      runner: 'node',
    },

    preprocessors: {
      '**/*.js?(x)': (file) =>
        require('@babel/core').transform(file.content, {
          sourceMap: true,
          compact: false,
          filename: file.path,
          presets: [require('babel-preset-jest'), 'react-app'],
        }),
    },

    setup: (wallaby) => {
      const jestConfig = require('react-scripts/scripts/utils/createJestConfig')(
        (p) => require.resolve('react-scripts/' + p)
      )
      Object.keys(jestConfig.transform || {}).forEach(
        (k) =>
          ~k.indexOf('^.+\\.(js|jsx') && void delete jestConfig.transform[k]
      )
      delete jestConfig.testEnvironment
      wallaby.testFramework.configure(jestConfig)
    },

    testFramework: 'jest',
  }
}