Jest Testing Fails

[parsable-mhalum]

I'm using your library for styling and when I'm updating my snapshots for jest react-native-size-matters keeps on failing the test here is the screen shot of the error.

[Nir Hadassi]

Hey @parsable-mhalum,
I need some more information to try and reproduce this:

• react-native-size-matters version
• react-native version
• jest version
• jest config
• any babel config (or similar tool if something else is used)
• test example

And best will be to provide some repo that reproduces the issue.

[parsable-mhalum]

hi @nirsky,

Here are the information that you need:

"react-native-size-matters": "^0.4.0",
"react-native": "0.63.4",
"jest": "^25.1.0",

Babel Config:

Test Example:

and here is the repo
https://github.com/martin9908/mytinerary

[Nir Hadassi]

Seems like the issue is related to the fact that react-native-size-matters is shipped uncompiled (common for react-native libs).
Related StackOverflow answer - https://stackoverflow.com/a/55803188/2546475
Jest offers a solution - https://jestjs.io/docs/tutorial-react-native#transformignorepatterns-customization

I was able to get it work with the following jest config:

"jest": {
    "preset": "react-native",
    "transformIgnorePatterns": [
      "node_modules/(?!(@react-native|react-native|react-native-size-matters)/)"
    ]
}

Let me know if this works for you.
I'll also consider shipping this lib pre-complied.

[Nir Hadassi]

I had issues compiling this project to commonJS due to babel-plugin-dotenv-import not working in commonJS.
So I'm gonna leave the solution as-is and close this issue.

[Adegorite Afolabi David]

Seems like the issue is related to the fact that react-native-size-matters is shipped uncompiled (common for react-native libs). Related StackOverflow answer - https://stackoverflow.com/a/55803188/2546475 Jest offers a solution - https://jestjs.io/docs/tutorial-react-native#transformignorepatterns-customization

I was able to get it work with the following jest config:

"jest": {
    "preset": "react-native",
    "transformIgnorePatterns": [
      "node_modules/(?!(@react-native|react-native|react-native-size-matters)/)"
    ]
}

Let me know if this works for you. I'll also consider shipping this lib pre-complied.

This doesn't resolve the issue, I'm still getting the error

[Denys Dovzhenko]

i use this jest.config.js for patched react-native-size-matters/extend, and it's working now for me:

/** @type {import('jest').Config} */
const config = {
  verbose: true,
  preset: "react-native",
  setupFiles: ["<rootDir>/jest.setup.js"],
  setupFilesAfterEnv: ["@testing-library/react-native/extend-expect"],
  transformIgnorePatterns: [
    "node_modules/(?!(@react-native|react-native|react-native-size-matters(?!/extend)))/",
  ],
};

module.exports = config;