I would say it's 6 kyu.

this is 7 kyu?!

Done.

Nice kata, well done.

Changed to snake_case.

fixed

Ruby 3.0 should be enabled, read this to learn how to do it

Please organize the structure of test fixture as following (although it has been mentioned in the attached link, I'm repeated here again)

describe "<This message should describe the categories of test groups inside this block>" do
  it "<A short message describing this test group>" do
    expect(...).to eq(...) #Assertions
    #Or Test.assert_equals(user_response, reference_response)
  end
end

Please use new python test framework.

For me, it's at least 2kyu !

I like this kata, but for me it is definetely harder than 6 kyu.

Ruby translation kumited, including a cleaner description -- please check and approve it (note: author is inactive)

Done

All done. I think.

Mayhaps :)