opContext.credentials in fetch object in the batch plugin

[DaLukasDev]

This adds the ability to use opContext.credentials in the batch plugin.

[codecov-commenter]

Codecov Report

Merging #167 (65dbdc4) into main (1910a14) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #167   +/-   ##
=======================================
  Coverage   94.65%   94.66%           
=======================================
  Files          26       26           
  Lines         561      562    +1     
  Branches      112      112           
=======================================
+ Hits          531      532    +1     
  Misses         30       30           

Impacted Files	Coverage Δ
packages/batch/src/index.ts	75.86% <100.00%> (+0.42%)	⬆️

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[logaretm]

Thanks for this. This is an excellent catch but let's try to solve it for any fetch option that might get passed here.

If you check the similar code in fetch.ts you can see it makes use of makeFetchOptions. We can do something similar by using the mergeFetchOpts function and merging the entire opContext into fetch options here.

Something like this:

const fetchOpts = mergeFetchOpts(opContext, { body });

response = await fetch(opContext.url as string, fetchOpts).then(parseResponse);

Also, a test for this use case would be great, but I can add it later.

[DaLukasDev]

Something like this? I could try to write a test but it would be a first for me writing a test with jest 😅