jest.js

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

"use strict";

// Fix eslint shareable config (https://github.com/eslint/eslint/issues/3458)
require("@rushstack/eslint-patch/modern-module-resolution");

// We use eslint-loader so even warnings are very visible.
// This is why we prefer to use "WARNING" level for potential errors,
// and we try not to use "ERROR" level at all.

module.exports = {
  plugins: ["jest", "testing-library"],
  overrides: [
    {
      files: ["**/__tests__/**/*", "**/*.{spec,test}.*"],
      env: {
        "jest/globals": true,
      },
      // A subset of the recommended rules:
      rules: {
        // https://github.com/jest-community/eslint-plugin-jest
        "jest/no-conditional-expect": "error",
        "jest/no-identical-title": "error",
        "jest/no-interpolation-in-snapshots": "error",
        "jest/no-jasmine-globals": "error",
        "jest/no-jest-import": "error",
        "jest/no-mocks-import": "error",
        "jest/valid-describe-callback": "error",
        "jest/valid-expect": "error",
        "jest/valid-expect-in-promise": "error",
        "jest/valid-title": "warn",

        // https://github.com/testing-library/eslint-plugin-testing-library
        "testing-library/await-async-query": "error",
        "testing-library/await-async-utils": "error",
        "testing-library/no-await-sync-query": "error",
        "testing-library/no-container": "error",
        "testing-library/no-debugging-utils": "error",
        "testing-library/no-dom-import": ["error", "react"],
        "testing-library/no-node-access": "error",
        "testing-library/no-promise-in-fire-event": "error",
        "testing-library/no-render-in-setup": "error",
        "testing-library/no-unnecessary-act": "error",
        "testing-library/no-wait-for-empty-callback": "error",
        "testing-library/no-wait-for-multiple-assertions": "error",
        "testing-library/no-wait-for-side-effects": "error",
        "testing-library/no-wait-for-snapshot": "error",
        "testing-library/prefer-find-by": "error",
        "testing-library/prefer-presence-queries": "error",
        "testing-library/prefer-query-by-disappearance": "error",
        "testing-library/prefer-screen-queries": "error",
        "testing-library/render-result-naming-convention": "error",
      },
    },
  ],
};