/jest-new-url-type-error

Primary LanguageJavaScriptMIT LicenseMIT

jest-new-url-type-error

Problem

Errors thrown by new URL constructor are not instances of error when jest is used

Test cases

This repository contains two files with the exact same test:

  • jest.test.js - Uses the jest test runner to execute the test
  • node.test.js - Uses only Node.js to execute the test

Note: For convenience, volta is used to run the test in different Node.js versions

Using only Node.js

When using Node.js, the test works consistently for every Node.js version:

volta run --node 14 node node.test.js # PASS
volta run --node 16 node node.test.js # PASS
volta run --node 18 node node.test.js # PASS

Using jest

When using Jest, the test always fails:

volta run --node 14 npx jest jest.test.js # FAILS
volta run --node 16 npx jest jest.test.js # FAILS
volta run --node 18 npx jest jest.test.js # FAILS
    expect(received).toBe(expected) // Object.is equality

    Expected: true
    Received: false

      11 |
      12 |     expect(error).toBeTruthy();
    > 13 |     expect(error instanceof TypeError).toBe(true);
         |                                        ^
      14 |     expect(error instanceof Error).toBe(true);
      15 | });

      at Object.toBe (jest.test.js:13:40)