when update to version 8 broke my application

[jadir-junior]

In version 7.1.3 I can import stringify

import {stringify} from 'query-string'

now in version ^8 a I can't, and when I try to refactor the code to import queryString and use queryString.stringify my tests with jest broken like that:

 Test suite failed to run

    Jest encountered an unexpected token

    Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax.

    Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration.

    By default "node_modules" folder is ignored by transformers.

    Here's what you can do:
     • If you are trying to use ECMAScript Modules, see https://jestjs.io/docs/ecmascript-modules for how to enable it.
     • If you are trying to use TypeScript, see https://jestjs.io/docs/getting-started#using-typescript
     • To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
     • If you need a custom transformation specify a "transform" option in your config.
     • If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.

    You'll find more details and examples of these config options in the docs:
    https://jestjs.io/docs/configuration
    For information about custom transformations, see:
    https://jestjs.io/docs/code-transformation

    Details:

    /home/jadirjsjunior/Projects/healthcare/healthcare-front/node_modules/query-string/index.js:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,jest){import * as queryString from './base.js';
                                                                                      ^^^^^^

    SyntaxError: Cannot use import statement outside a module

      4 | import { Observable } from 'rxjs'
      5 | import { environment } from 'src/environments/environment'
    > 6 | import queryString from 'query-string'
        | ^

[sindresorhus]

https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c

[lukasvice]

With version 8, I had to use

import queryString from 'query-string'

queryString.stringify(queryParams)

[varshagada]

Even I am facing the same issue. After upgrading to version 8 , my tests start to fail. I tried all the steps https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c but none of them worked. Can anyone suggest solution to it?

[cbrenner04]

@sindresorhus I am not sure how your response answers the question. I am probably being a little dense. Unlike @lukasvice, I was already importing query-string that way. I tried a few different things listed in your link to no avail. If its not too much trouble, would you mind being a little more precise with your response? Thank you!

@jadir-junior if you resolved this, please respond with your fix. Thank you!

[smajl]

@jadir-junior @varshagada @cbrenner04 In your main Jest preset file you should have smth like this:

const esModules = [
  'other_modules_based_on_your_needs',
  // but mainly those 4 bellow
  'query-string',
  'decode-uri-component',
  'split-on-first',
  'filter-obj',
];

module.exports = {
  ...
  transformIgnorePatterns: esModules.length ? [`/node_modules/(?!${esModules.join('|')})`] : [],
  ...
}

Basically I had to add not only query-string but also its 3 dependencies.

[varshagada]

Even I am facing the same issue. After upgrading to version 8 , my tests start to fail. I tried all the steps https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c but none of them worked. Can anyone suggest solution to it?

I got it solved by mocking the Query-string in my test files.

sample.test.js

import queryString from 'query-string'

jest.mock('query-string' , () => ({
//mock whatever you use from query-string
parse :jest.fn(),
stringify: jest.fn()
}));

Thankyou

[yvbeek]

Similar to @smajl 's solution. You can also add the following section to your package.json:

  "jest": {
    "preset": "react-native",
    "moduleFileExtensions": [
      "ts",
      "tsx",
      "js",
      "jsx"
    ],
    "transformIgnorePatterns": [
      "node_modules/(?!(@react-native|react-native|decode-uri-component|filter-obj|split-on-first|query-string)/)"
    ]
  }

Note: I'm using React-Native, if you aren't, you'll have to tweak it a bit.

[rodrigo-gross]

Similar to @smajl 's solution. You can also add the following section to your package.json:

  "jest": {
    "preset": "react-native",
    "moduleFileExtensions": [
      "ts",
      "tsx",
      "js",
      "jsx"
    ],
    "transformIgnorePatterns": [
      "node_modules/(?!(@react-native|react-native|decode-uri-component|filter-obj|split-on-first|query-string)/)"
    ]
  }

Note: I'm using React-Native, if you aren't, you'll have to tweak it a bit.

This worked for me, thanks

[danvoyce]

I'm also having this issue. I can't mock this out as it's critical to my app and needs testing.

Adding transformIgnorePatterns doesn't seem to work for me either.

@sindresorhus any help on this would be really appreciated 🙏 The link you provided above doesn't work, and this issue shouldn't really be closed.

[juancho11gm]

I had to install @babel/plugin-proposal-private-methods and add it to the jest.config.ts file. Also, some node modules packages were included in the transformIgnorePatterns option.

	transformIgnorePatterns: [
		'node_modules/(?!(query-string|decode-uri-component|split-on-first|filter-obj)/)',
	],
	babelConfig: {
		plugins: ['@babel/plugin-proposal-private-methods'],
	},

[athielba]

In my case, I just added the following code in the jest.config.js

module.exports = {
 ...
  transformIgnorePatterns: [
      'node_modules/(?!(query-string|decode-uri-component|split-on-first|filter-obj)/)',
  ],
}

[EperezOk]

The transformIgnorePatterns didn't work for me (I have a NextJS 12 app), I had to mock the library.
Inside jest.setup.js:

jest.mock("query-string" , () => ({
    __esModule: true,
    default: {
        parse :jest.fn(),
        stringify: jest.fn()
    }
}))

[Chanki-Min]

For some PNPM hitchhikers who getting this problem again when migrated PNPM form npm. You need to add .pnpm/ subdir right after node_modules

const esModules = [
  'other_modules_based_on_your_needs',
  // but mainly those 4 bellow
  'query-string',
  'decode-uri-component',
  'split-on-first',
  'filter-obj',
];

module.exports = {
  ...
  transformIgnorePatterns: esModules.length ? [`/node_modules/.pnpm/(?!${esModules.join('|')})`] : [],
  ...
}

[arnoldc]

jest.mock("query-string" , () => {
    const actualQueryString = jest.requireActual("query-string");
    return {
      __esModule: true,
      default: {
          parse :actualQueryString.default.parse,
          stringify: actualQueryString.default.stringify,
      },
    };
});

I had done this in my side ^ + the transformIgnorePatterns changes
, so i can still make use of the actual library method and it works ,
thanks for the suggestion guys