Jest fails with “Unexpected token *” on import statement

Question

Why does Jest fail with \"Unexpected token *\" on a simple import statement...

Error log:

Admin@Admin-PC MINGW32 /d/project (master)
$ npm         


        

Answer 1

I am using react-native-web and the fix for my issue was to add the react-native-web preset to my jest.config.js:

module.exports = {
transform: {
  '^.+\\.tsx?$': 'ts-jest',
},
timers: 'fake',
testPathIgnorePatterns: [
  '/build/',
  '/node_modules/',
  '/rndemo/build/',
],
globals: {
  'ts-jest': {
    diagnostics: {
      warnOnly: true,
    },
  },
},
preset: 'react-native-web',
}