fix: update scope when content-length changes

[mfmarche]

The actual arg (scope), needs to be updated when the content-length changes.

Fixes #1954

Changes proposed in this pull request:

[RobbeSneyders]

Thanks @mfmarche!

You are on to something. It indeed seems like the updated header does not have an effect. However, the scope does need to be copied whenever it is modified in middleware, so the changes in the scope are only propagated downstream.

I think the best solution is to update this method to return the modified scope as well.

Also, it would be great if you could add a test for this behavior.

[mfmarche]

Thanks @RobbeSneyders . I took your comments and added appropriate test, and now return the content length. The test prior to the scope change gave a 500, which was similiar to what I saw.

[RobbeSneyders]

Thanks @mfmarche, the change looks good to me. The pipeline is failing on pre-commit though. You can fix this by running pre-commit run --all-files and committing the results.

To have it run automatically in the future, you can run pre-commit install.

[coveralls]

coverage: 94.408% (+0.3%) from 94.15%
when pulling ae44b00 on mfmarche:fix_scope_update
into 7c4fcc4 on spec-first:main.

[RobbeSneyders]

Thanks @mfmarche!