Did Jest v30 have been tested?

[sneko]

Hi,

I was struggling with Jest v29 because it always makes comparaison of 2 different URLs objects passes, whereas it should not. It has been reported multiple times (here an example: jestjs/jest#15032 (comment)).

A fix has been implemented but is only available in Jest v30.

Do the ts-jest maintainers are investigating/testing the v30? It's here for almost a year but I do see restrictions in your code that do not recommend using it.

For example I did in my package.json:

  "overrides": {
    "ts-jest": {
      "jest": "30.0.0-alpha.6"
    },
  }

But there is a log warning: ts-jest[versions] (WARN) Version 30.0.0-alpha.6 of jest installed has not been tested with ts-jest. If you're experiencing issues, consider using a supported version (>=29.0.0 <30.0.0-0). Please do not report issues in ts-jest if you are using unsupported versions.

So I'm just crossing fingers I won't have weird issues for my normal Jest usage 😄

Thank you,

cc @ahnpnl

[ahnpnl]

Hi, we haven't tested against Jest 30 yet. Possibly we can make a next branch to test against Jest 30

[mhanxchu]

Is jest v30 still working for you?

[sneko]

@mhanxchu yes, I had nothing to change to my configuration from Jest v29. But I guess depending on plugins you have, something can break. The best I can advise if you have any error is to try using v29 first to see if it persists.

Just in case, here my jest.config.ts:

import { getTsconfig } from 'get-tsconfig';
import { Config } from 'jest';
import { pathsToModuleNameMapper } from 'ts-jest';

const fullTsconfig = getTsconfig();
if (!fullTsconfig) {
  throw new Error(`a "tsconfig.json" must be provided`);
}

const customJestConfig: Config = {
  preset: 'ts-jest',
  setupFilesAfterEnv: [],
  moduleDirectories: ['node_modules', '<rootDir>/'],
  moduleNameMapper: {
    ...(fullTsconfig.config.compilerOptions && fullTsconfig.config.compilerOptions.paths
      ? pathsToModuleNameMapper(fullTsconfig.config.compilerOptions.paths, { prefix: '<rootDir>/' })
      : {}),
  },
  testEnvironment: 'jest-environment-node',
  modulePathIgnorePatterns: ['<rootDir>/data/'],
  testPathIgnorePatterns: ['<rootDir>/data/', '<rootDir>/node_modules/'],
  transformIgnorePatterns: [],
  extensionsToTreatAsEsm: ['.ts'],
  transform: {
    '\\.ts$': [
      'ts-jest',
      {
        useESM: true,
        isolatedModules: true, // It disables type checking to make it faster (note it's not taken by default from the `tsconfig.json`)
      },
    ],
  },
};

export default customJestConfig;