Jest tests failed after upgrading axios to v1.1.2

[imransilvake]

Describe the bug

I updated the Axios from "axios": "^0.27.2" to "axios": "^1.1.2", and Jest tests are not working anymore with the following error:

FAIL src/app/slices/app/App.slice.test.tsx
  ● 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:

    /Users/imrankhan/Development/roc/node_modules/axios/index.js:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,jest){import axios from './lib/axios.js';
                                                                                      ^^^^^^

    SyntaxError: Cannot use import statement outside a module

    > 1 | import axios, { AxiosRequestConfig } from 'axios';
        | ^
      2 |
      3 | class HttpClientService {
      4 |       /**

      at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1728:14)
      at Object.<anonymous> (src/app/services/http-client/HttpClient.service.tsx:1:1)

To Reproduce

1. Use React and Axios latest version
2. Create Jest test
3. Run the test to generate the error

Environment

• Axios Version ^v1.1.2
• Browser Chrome
• Browser Version Version 105.0.5195.125 (Official Build) (x86_64)
• Node.js Version v18.4.0
• OS: MAC OS 12.4
• React: ^18.2.0

Temporary Fix

The following fix works for now but I expect a standard fix for this issue.

"test": "react-scripts test --transformIgnorePatterns \"node_modules/(?!axios)/\"",

or

"test": "react-app-rewired test --transformIgnorePatterns \"node_modules/(?!axios)/\"",

[lejahmie]

For context: Problem seem to be that Axios is now built as ES Module instead of CommonJs when not run in Node. Problem with Jest is that it runs code in Node, but application is built for web-clients.
This is why telling Jest to transform Axios works.

[pzi]

See #5026

[rathpc]

The change to transformIgnorePatterns does not work in my case so I am hoping there is a proper fix provided from axios soon.

[hisuwh]

yh transformIgnorePatterns "fix" is not working for me

[rathpc]

I found that this did however work for me because it forces those imports to resolve with the CJS module instead:

  moduleNameMapper: {
    '^axios$': require.resolve('axios'),
  },

[rd-stefan-riehmer]

@rathpc - i tried your solution.
outcome:
jest test: mocking with jest.mock('axios') works again
the app (called from jest): the library axios is imported and it's value is undefined and therefore i get an error => e.g. Cannot read properties of undefined (reading 'get')

[zntemel]

"test": "react-scripts test --transformIgnorePatterns \"node_modules/(?!axios)/\""

this worked, when I restart test command

[tanthuann]

I found that this did however work for me because it forces those imports to resolve with the CJS module instead:

  moduleNameMapper: {
    '^axios$': require.resolve('axios'),
  },

Thank you!
This is work for me, not transformIgnorePatterns

[pzi]

Try upgrading jest to latest (>29.2.x), it worked for me without having to change jest config.

[single9]

Try upgrading jest to latest (>29.2.x), it worked for me without having to change jest config.

You save my time!