Jest coverage is throwing packager errors

[kirkstrobeck]

Description

What I did

I added Jest to my project and started generating code coverage reports, which creates a folder named "coverage" at the project root.

What you expect to happen

I expected nothing to happen with the code.

What actually happens

Packager is looking at it for some reason, and it is causing an error.

TransformError /PATH/coverage/lcov-report/sort-arrow-sprite.png: Unexpected character '�' (1:0)

Reproduction

Having trouble reproducing.

Solution

The coverage folder should not be included in the packager logic or I should be able to ignore it. It’s unclear why it is looking in there as I have not linked to any files in the folder.

Additional Information

• React Native version: 0.39.2
• Platform: iOS
• Operating System: OS X 10.12.3

[ericvicenti]

cc @cpojer

[kirkstrobeck]

• I have since upgraded to 0.41.2 and am still experiencing the issue, so any additional notes may be applicable to only this newer version
• Tried packager: a way to blacklist some folders/files in a RN app? #7271 (comment) and it didn’t work
• It throws the error when the coverage report is generated. If I hit reload, I can use my app just fine even though the offending .png is still present. It seems to be that the Packager file watcher is having/starting/causing the issue.

[kirkstrobeck]

This worked for me http://stackoverflow.com/a/41963217/537998

This still feels like a bug to me, but I’ll close since the issue can be resolved.

[rogerkerse]

this is more like a bug. Quite unintuitive to do this with every react native project