CODEWITHSUNDEEP
rubyrspec
JayTarka
JayTarka

Reputation: 571

Store ruby code in a let() variable

I want to store the code will be run inside each_with_index block:

describe '#each_with_index' do
  subject { [:a,:b].each_with_index{ block.to_ruby } }

  context 'when the block prints v to console' do
    let(:block) { '|v| puts v' }
    specify { expect { subject }.to output(':a :b').to_stdout }
  end

  context 'when the block prints i to console' do
    let(:block) { '|v,i| puts i' }
    specify { expect { subject }.to output('0 1').to_stdout }
  end

  context 'when the block prints v and i to console' do
    let(:block) { '|v,i| puts "#{v} and {i}"' }
    specify { expect { subject }.to output(':a and 0 :b and 1').to_stdout }
  end
end

I don't need the code stored as a string, it is just a way to show you what I mean. I want to do this with in-block code, pipes, and everything. I've got a feeling we can use Proc.new but the pipes are tripping me up.

Upvotes: 2

Views: 212

Answers (1)

Satya
Satya

Reputation: 4478

Something like:

let(:block) { Proc.new{ |v| puts v } }
subject { [:a,:b].each_with_index { |*args| block.call args } }

Upvotes: 3

Related Questions