Trying to make these methods chain! I'd expect these to work... kinda. It gets confusing fast. The expectation should stay mostly intact, but needs to accept an initial argument. The `run_chain` method is where most changes should be made.

chainable.rb

require 'rspec'

action = Struct.new(:action, :args)

def run_chain(action_chain, anchor)
  action_chain.inject(anchor) do |chain, link|
    lambda do
      link.action.call(chain.action.call)
    end
  end.call
end

describe('chaining methods') do
  let(:action_chain) do
    lambda1 = -> (var) { var }
    lambda2 = -> (var) { var + 1 }
    lambda3 = -> (var) { "I have #{var} pickles" }
    [
      action.new(lambda1),
      action.new(lambda2),
      action.new(lambda3)
    ]
  end

  it 'chains and calls the methods' do
    anchor = -> { action.new(action: -> { 1 }) }
    expect(run_chain(action_chain, anchor))
      .to eq('I have 2 pickles')
  end
end