比较哈希数组与红宝石中的正则表达式

Question

I have two array of hashes. Actual array is one I'm getting through my test and I have expected array stored somewhere in files with which I compare the actual one.

• Actual array

  [ {:var1=>nil, :action=>"open", :Run=>"App", :Id=>"A123-B456-C789"}, {:var1=>nil, :Id=>"P987-Q654-R321"} ]

• Expected array

  [ {:var1=>nil, :action=>"open", :Run=>"App", :Id=>"A123-B456-C789"}, {:var1=>nil, :Id=>"P987-Q654-R321"} ]

Currently, I am using Rspec::Matcher match_array to compare and it is working perfectly:

expect(actual).to match_array(expected)

Problem :

Id in actual array in every hash is dynamic. So, I can not compare it with expected value. Here, I would like compare if it is not nil or check pattern with some regex. Something like this:

{:var1=>nil, :Id=> !nil or /some-regex/}

Not sure if it's doable with Rspec Matcher or I need to change matcher library?

Thanks in advance!

Answer 1

Use a double:

let(:id_double) { double('id') }
let(:expected) do
  [
    { var1: nil, action: 'open', Run: 'App', Id: id_double },
    { var1: nil, Id: id_double }
  ]
end

before do
  allow(id_double).to receive(:==) do |other_id|
    other_id =~ /^[A-Z]\d{3}-[A-Z]\d{3}-[A-Z]\d{3}$/
  end
end

it 'works' do
  actual = # ...
  expect(actual).to match_array(expected)
end