jest.config.js

module.exports = {

  // Automatically clear mock calls and instances between every test
  clearMocks: true,

  // A map from regular expressions to paths to transformers
  transform: {
    '^.+\\.(ts|tsx|js|jsx)$': [
      'babel-jest', {
        presets: [
          ['@babel/preset-env', { targets: { node: 'current' } }],
          ['@babel/preset-typescript']
        ],
        plugins: ['@vue/babel-plugin-jsx']
      }
    ]
  },

  // The glob patterns Jest uses to detect test files
  testMatch: ['**/**/*.spec.(ts|tsx)'],

  // An array of file extensions your modules use
  moduleFileExtensions: ['js', 'json', 'ts', 'tsx'],

  // A map from regular expressions to module names or to arrays of module names that allow to stub out resources with a single module
  moduleNameMapper: {
    '\\.(css|less|scss|sass)$': '<rootDir>/__mocks__/style-mock.ts',
    '\\.(gif|ttf|eot|svg|jpg|png)$': '<rootDir>/__mocks__/file-mock.ts',
  },

  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
  testPathIgnorePatterns: ['/node_modules/'],

  // The test environment that will be used for testing
  testEnvironment: 'jest-environment-jsdom'
};