Add support for Rails view components

[budu]

View components are using a block to be able to render slots.

[tagliala]

Thanks, can you please add a spec?

[budu]

Done.

I wasn't sure how to fake the component here, so I went with an anonymous class.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.31%. Comparing base (5526517) to head (4a28ea6).
Report is 1 commits behind head on master.

Additional details and impacted files

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  Coverage   94.31%   94.31%           
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  Files          17       17           
  Lines         457      457           
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  Hits          431      431           
  Misses         26       26           

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[javierjulio]

@budu can you please provide more information about what you are trying to do here and how this would be used? It's not clear if you are referring to view components as a general thing from Arbre's perspective or something specific to Rails. We'll also include this PR in the release notes so it would help to have background and examples on what this provides. Thank you.

[budu]

In my use case, it's to support ViewComponent's slots feature. For example:

render BlogComponent.new do |component|
  component.with_header do
    link_to "My blog", root_path
  end
  BlogPost.all.each do |blog_post|
    component.with_post do
      link_to blog_post.name, blog_post.url
    end
  end
end

This allows the render helper to pass-in the view context along with the block to the component.

ViewComponent was using a monkey patch before Rails 6.1. The render helper from ActionView was changed in this commit to accomodate the render_in back in 2019.

[javierjulio]

Thanks!