test-repo/jest.config.js

"use strict";

const ENABLE_COVERAGE = !!process.env.CI;

const requiresPrettierInternals = [
  "tests_integration/__tests__/util-shared.js",
  "tests_integration/__tests__/help-options.js"
];

const semver = require("semver");
const isOldNode = semver.parse(process.version).major <= 4;

module.exports = {
  setupFiles: ["<rootDir>/tests_config/run_spec.js"],
  snapshotSerializers: [
    "jest-snapshot-serializer-raw",
    "jest-snapshot-serializer-ansi"
  ],
  testRegex: "jsfmt\\.spec\\.js$|__tests__/.*\\.js$",
  testPathIgnorePatterns: ["tests/new_react", "tests/more_react"].concat(
    isOldNode ? requiresPrettierInternals : []
  ),
  collectCoverage: ENABLE_COVERAGE,
  collectCoverageFrom: ["src/**/*.js", "index.js", "!<rootDir>/node_modules/"],
  coveragePathIgnorePatterns: [
    "<rootDir>/standalone.js",
    "<rootDir>/src/doc/doc-debug.js",
    "<rootDir>/src/main/massage-ast.js"
  ],
  moduleNameMapper: {
    // Jest wires `fs` to `graceful-fs`, which causes a memory leak when
    // `graceful-fs` does `require('fs')`.
    // Ref: https://github.com/facebook/jest/issues/2179#issuecomment-355231418
    // If this is removed, see also scripts/build/build.js.
    "graceful-fs": "<rootDir>/tests_config/fs.js",

    "prettier/local": "<rootDir>/tests_config/require_prettier.js",
    "prettier/standalone": "<rootDir>/tests_config/require_standalone.js"
  },
  testEnvironment: "node",
  transform: {},
  watchPlugins: [
    "jest-watch-typeahead/filename",
    "jest-watch-typeahead/testname"
  ],
  reporters: process.env.REPORT_SUMMARIES
    ? [
        "default",
        [
          "jest-junit",
          {
            output: "./test-results/jest/junit.xml"
          }
        ]
      ]
    : undefined
};