Make Jest configs runnable scripts #432
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Getting Jest to work with ESM modules has been painful, and the guide at https://jestjs.io/docs/ecmascript-modules doesn't seem to work when the Jest config is in a TypeScript file. Since I'm stubborn, I decided to try to find a workaround, and I found this one! We make the config a runnable script that runs the Jest command, rather than relying on the Jest command to read the config. This is a bit funny, but it seems to work, because Jest requires configuration to be JSON-serializable: https://jestjs.io/docs/configuration and the command-line config option (https://jestjs.io/docs/cli#--configpath) accepts a JSON string!
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simona1
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Sep 22, 2024
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Getting Jest to work with ESM modules has been painful, and the guide at https://jestjs.io/docs/ecmascript-modules doesn't seem to work when the Jest config is in a TypeScript file.
Since I'm stubborn, I decided to try to find a workaround, and I found this one! We make the config a runnable script that runs the Jest command, rather than relying on the Jest command to read the config. This is a bit funny, but it seems to work, because Jest requires configuration to be JSON-serializable: https://jestjs.io/docs/configuration and the command-line config option (https://jestjs.io/docs/cli#--configpath) accepts a JSON string!