Migrate from `golden_toolkit` to an alternative

[nilsreichardt]

The golden_toolkit package hasn't a maintainer anymore. Therefore, we should migrate to an alternative. The following packages are good candidates:

• https://pub.dev/packages/alchemist

[faresbouzayen]

Hi @nilsreichardt,

I'd like to work on migrating the project from golden_toolkit to alchemist. I’ll refactor the snapshot tests and ensure everything works smoothly with the new package.

Thanks!

[nilsreichardt]

Hi @faresbouzayen,

Thanks for taking this over!

Here is a bit more information and things you need to keep in mind when doing this migration:

• Sometimes we used the multiScreenGolden method which generates goldens for different screen sizes, see https://github.com/SharezoneApp/sharezone-app/blob/e22d4b61fd11c60d908362779a2adc81e259bf31/app/test_goldens/blackboard/details/blackboard_item_read_by_users_list_page_test.dart#L85 - we need something similar with alchemist.
• We use platform tests and not CI tests this means that also the text is rendered in the goldens, see the following link for more information: https://pub.dev/packages/alchemist#about-platform-tests-vs-ci-tests
• Also, our golden_toolkit config file can be helpful: https://github.com/SharezoneApp/sharezone-app/blob/da2d45ee0cd76e0f79c54b8c09d5ff22701406de/app/test_goldens/flutter_test_config.dart