jest.js

module.exports = {
  env: {
    jest: true,
  },
  plugins: ["jest"],
  rules: {
    //
    // Jest Rules
    //
    // Enforce consistent test or it keyword
    "jest/consistent-test-it": ["warn", { fn: "test", withinDescribe: "test" }],
    // Enforce assertion to be made in a test body
    // Off for now, pending a resolution to https://github.com/jest-community/eslint-plugin-jest/issues/175
    "jest/expect-expect": [
      "warn",
      { assertFunctionNames: ["expect", "td.verify"] },
    ],
    // Disallow capitalized test names
    "jest/lowercase-name": "warn",
    // Don't use alias methods
    "jest/no-alias-methods": "off",
    // Disallow commented out tests
    "jest/no-commented-out-tests": "warn",
    // Disallow disabled tests
    "jest/no-disabled-tests": "warn",
    // Disallow duplicate setup and teardown hooks
    "jest/no-duplicate-hooks": "warn",
    // Disallow empty titles
    "jest/no-empty-title": "warn",
    // Avoid using expect().resolves
    "jest/no-expect-resolves": "warn",
    // no export from test file
    "jest/no-export": "warn",
    // Disallow focused tests
    "jest/no-focused-tests": "warn",
    // Disallow setup and teardown hooks
    "jest/no-hooks": "off",
    // Disallow identical titles
    "jest/no-identical-title": "warn",
    // Disallow conditional logic.
    "jest/no-if": "warn",
    // Disallow Jasmine globals
    "jest/no-jasmine-globals": "warn",
    // Disallow importing jest
    "jest/no-jest-import": "warn",
    // Disallow large snapshots
    "jest/no-large-snapshots": "warn",
    // Disallow manually importing from __mocks__
    "jest/no-mocks-import": "warn",
    // No standalone expect in a describe block
    "jest/no-standalone-expect": "warn",
    // Avoid using a callback in asynchronous tests
    "jest/no-test-callback": "warn",
    // Disallow using f & x prefixes to define focused/skipped tests
    "jest/no-test-prefixes": "off",
    // Disallow explicitly returning from tests
    "jest/no-test-return-statement": "warn",
    // Disallow using toBeTruthy() & toBeFalsy()
    "jest/no-truthy-falsy": "warn",
    // Prevent catch assertions in tests
    "jest/no-try-expect": "warn",
    // Suggest using toBeCalledWith OR toHaveBeenCalledWith
    "jest/prefer-called-with": "warn",
    // Suggest using expect.assertions() OR expect.hasAssertions()
    "jest/prefer-expect-assertions": "off",
    // Suggest to have all hooks at top-level before tests
    "jest/prefer-hooks-on-top": "warn",
    // Suggest using inline snapshots
    "jest/prefer-inline-snapshots": "off",
    // Suggest using jest.spyOn()
    "jest/prefer-spy-on": "warn",
    // Suggest using toStrictEqual()
    "jest/prefer-strict-equal": "warn",
    // Suggest using toBeNull()
    "jest/prefer-to-be-null": "warn",
    // Suggest using toBeUndefined()
    "jest/prefer-to-be-undefined": "warn",
    // Suggest using toContain()
    "jest/prefer-to-contain": "warn",
    // Suggest using toHaveLength()
    "jest/prefer-to-have-length": "warn",
    // Suggest using test.todo
    "jest/prefer-todo": "warn",
    // Require top-level describe block
    "jest/require-top-level-describe": "warn",
    // Require a message for toThrow()
    "jest/require-tothrow-message": "warn",
    // Enforce valid describe() callback
    "jest/valid-describe": "warn",
    // Ensure expect is called correctly
    "jest/valid-expect": "warn",
    // Enforce having return statement when testing with promises
    "jest/valid-expect-in-promise": "warn",

    //
    // Overrides of base configuration
    //
    // specify the maximum depth callbacks can be nested
    "max-nested-callbacks": "off",
    // specify the maximum number of statement allowed in a function
    "max-statements": "off",
  },
};