eslint-plugin-jest/src/rules/__tests__/prefer-strict-equal.test.js

Eslint rules for Jest

'use strict';

const { RuleTester } = require('eslint');
const rule = require('../prefer-strict-equal');

const ruleTester = new RuleTester();

ruleTester.run('prefer-strict-equal', rule, {
  valid: [
    'expect(something).toStrictEqual(somethingElse);',
    "a().toEqual('b')",
  ],
  invalid: [
    {
      code: 'expect(something).toEqual(somethingElse);',
      errors: [{ messageId: 'useToStrictEqual', column: 19, line: 1 }],
      output: 'expect(something).toStrictEqual(somethingElse);',
    },
  ],
});