Fix issue with jest caching of block.json files#16899
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…ith the block json file
talldan
added
[Type] Bug
talldan
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ajitbohra,
gziolo,
nerrad and
ntwb
as code owners
| module.exports = { | ||
| ...babelJestTransformer, | ||
| getCacheKey( src, filename, ...args ) { | ||
| const isBlockIndex = /block-library[\/\\]src[\/\\].+[\/\\]index\.js/.test( filename ); |
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I don't think it's very useful as part of @wordpress/jest-preset-default in the current form. The issue is that this check is very specific to the structure of the Gutenberg repository and it will never match with any block definition which is maintained by other projects.
Moving forward, I see 2 ways of handling it. We either move this override to https://github.com/WordPress/gutenberg/blob/master/test/unit/jest.config.js which is local to Gutenberg or we find a way to approach it for all projects which load block.json. Given that we want to rework how block.json is loaded as proposed in #16088, it might be better to apply this transform to local unit tests config.
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Thanks for the feedback. Yep, you're right, it shouldn't be in that package. I've moved it to the appropriate place. It still seems to work.
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| // src together. This will result in the cache key changing and the cache being | ||
| // invalidated for the index when any changes to the json are made. | ||
| const blockJSONSrc = fs.readFileSync( blockJSONFilename ); | ||
| return babelJestTransformer.getCacheKey( `${ src }\n${ blockJSONSrc }`, filename, ...args ); |
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Interesting, but it fully aligns with what Babel does as far as I can tell :)
|
Thanks! I'll merge. After all, it'll only affect tests and if we see issues it can be reverted easily enough. |
* Generate cache key for block index files by concatenating the index with the block json file * Move implementation to the test/unit folder
* Generate cache key for block index files by concatenating the index with the block json file * Move implementation to the test/unit folder
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Fixes #16176
Related #16150
Short description
This PR fixes the way jest caches block.json contents by ensuring the cache is invalidated when the block.json file changes.
Long description
Block.json files are built by inlining the json as a JavaScript primitive into the index.js file they're imported into using
babel-plugin-inline-json-import.This seems to have caused an issue with jest's caching system. When jest builds a cache, it does so by generating a unique key for each file. Json files don't seem to be included in this cache. When a block.json is changed, jest seems to just look at the block's index.js source, and generates the same cache key because it hasn't changed. This means that often when adding new attributes to a block, the test results can be inaccurate because the built index.js still contains the old version of the block.json.
This PR fixes the issue by ensuring that jest generates a cache key for the block index.js that incorporates the contents of the block.json too.
How has this been tested?
npm run test-unit test/integration/full-content/full-content.spec.jsnpm run test-unit test/integration/full-content/full-content.spec.jsExpected Result (what happens on this branch)
The tests for the paragraph block should fail
Actual Result (what happens on master)
The tests still pass because the attributes from the block.json are still cached.
Screenshots
Types of changes
Bug fix (non-breaking change which fixes an issue)
Checklist: