RSpec/IteratedExpectation complains about code that can't be rewritten to use all

[ccutrer]

dont_convert.each do |ascii|
  expect(ascii).to eq LuckySneaks::Unidecoder.decode(ascii)
end

RSpec/IteratedExpectation: Prefer using the all matcher instead of iterating over an array.

I'd love to convert to an all, but afaict all can't modify the expectation per element, since the expectation is dynamic based on the element. I was hoping for a syntax like

expect(dont_convert).to(all { |ascii| eq LuckySneaks::Unidecoder.decode(ascii) }) but it doesn't work.

rubocop -V:

1.22.0 (using Parser 3.0.2.0, rubocop-ast 1.12.0, running on ruby 2.7.2 x86_64-darwin20)
  - rubocop-performance 1.11.5
  - rubocop-rails 2.12.4
  - rubocop-rake 0.6.0
  - rubocop-rspec 2.5.0

[pirj]

Well, this specific case can be converted with satisfy:

expect(data_convert).to all satisfy { |ascii| ascii == LuckySneaks::Unidecoder.decode(ascii) }

[ccutrer]

Perfect! Thanks! You might want to include an example of converting to satisfy in the docs for the cop. I've never seen it before. One of my favorite things about rubocop is that it points me to learn knew things about writing better code that I never knew existed.

[pirj]

A pull request is welcome!