CIF-1115 - Allow product dnd on product carousel

[cjelger]

• added sling POST processor to add products to the array property
• modified carousel to support products paths and skus

Description

This PR adds the possibility to add products to the carousel with drag'n'drop, and extends the array of products with each new product added to the carousel.

How Has This Been Tested?

Added unit tests and manually tested.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes and the overall coverage did not decrease.
• All unit tests pass on CircleCi.
• I ran all tests locally and they pass.

[codecov]

Codecov Report

Merging #158 into master will decrease coverage by 28.54%.
The diff coverage is 90%.

@@              Coverage Diff              @@
##             master     #158       +/-   ##
=============================================
- Coverage     83.47%   54.92%   -28.55%     
- Complexity      395      406       +11     
=============================================
  Files            50      140       +90     
  Lines          1452     3814     +2362     
  Branches        118      665      +547     
=============================================
+ Hits           1212     2095      +883     
- Misses          161     1636     +1475     
- Partials         79       83        +4

Flag	Coverage Δ	Complexity Δ
#jest	36.27% <ø> (?)	0 <ø> (?)
#karma	93.66% <ø> (ø)	0 <ø> (ø)	⬇️
#unittests	81.34% <90%> (+0.35%)	406 <12> (+11)	⬆️

Impacted Files	Coverage Δ	Complexity Δ
...models/v1/productcarousel/ProductCarouselImpl.java	76.74% <80%> (-0.18%)	11 <2> (+1)
...al/servlets/MultiFieldDropTargetPostProcessor.java	91.11% <91.11%> (ø)	10 <10> (?)
...t-components/src/components/Minicart/couponForm.js	100% <0%> (ø)	0% <0%> (?)
...nents/src/components/Minicart/emptyMinicartBody.js	60% <0%> (ø)	0% <0%> (?)
...mponents/src/components/CartTrigger/cartCounter.js	100% <0%> (ø)	0% <0%> (?)
.../src/components/Checkout/shippingAddressSummary.js	22.22% <0%> (ø)	0% <0%> (?)
...-components/src/components/Checkout/addressForm.js	23.52% <0%> (ø)	0% <0%> (?)
react-components/src/components/SignIn/signIn.js	100% <0%> (ø)	0% <0%> (?)
...t-components/src/components/Minicart/couponItem.js	100% <0%> (ø)	0% <0%> (?)
...act-components/src/queries/query_countries.graphql	12.5% <0%> (ø)	0% <0%> (?)
... and 82 more

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[herzog31]

Would it possible to scope this servlet somehow to our CIF components? I'm wondering what would happen if a customer already has a custom drop target servlet like this for other components?

At least we should mention this in the documentation or component readme.

[cjelger]

It's kind of scoped because it only handles property keys starting with ./dropTarget-> so it could only "collide with itself" if a customer already uses the same post processor. I will extend the documentation or component readme.