jest.config.js

module.exports = {
  preset: "@vue/cli-plugin-unit-jest",
  moduleFileExtensions: ["js", "jsx", "json", "vue"],
  transform: {
    "^.+\\.vue$": "vue-jest",
    ".+\\.(css|styl|less|sass|scss|svg|png|jpg|ttf|woff|woff2)$":
      "jest-transform-stub",
    "^.+\\.(js|jsx)?$": "babel-jest"
  },
  transformIgnorePatterns: ["/node_modules/"],
  moduleNameMapper: {
    "^@/(.*)$": "<rootDir>/src/$1",
    "\\.(css|less|scss|sss|styl)$": "<rootDir>/node_modules/jest-css-modules",
    "\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$":
      "<rootDir>/tests/__mocks__/fileMock.js"
  },
  snapshotSerializers: ["jest-serializer-vue"],
  testMatch: ["**/tests/unit/**/*.[jt]s?(x)", "**/__tests__/**/*.[jt]s?(x)"],
  testURL: "http://localhost/",
  watchPlugins: [
    "jest-watch-typeahead/filename",
    "jest-watch-typeahead/testname"
  ],
  //TEST COVERAGE
  coverageDirectory: "tests/coverage",
  collectCoverage: true,
  collectCoverageFrom: [
    "**/*.{js,vue}",
    "!**/node_modules/**",
    "!<rootDir>/dist/**",
    "!<rootDir>/src/plugins/**",
    "!<rootDir>/tests/**",
    "!**/__tests__/**"
  ],
  coverageReporters: ["lcov", "text-summary"]
};