Passing variables

specs.rb

shared_examples 'BlueprintBase' do
  subject { described_class.new('') }

  describe '#alert_type' do
    it "is defined" do
      expect(subject.alert_type).to eq(alert_type)
    end
  end
end

# batting_now_spec.rb

require 'spec_helper'

describe Pulse::Payload::Baseball::BattingNow do
  include_examples 'BlueprintBase'

  it_behaves_like 'BlueprintBase' do
    let(:alert_type) { 'batting_now'}
  end'
end

#  Failure/Error: expect(subject.alert_type).to eq(alert_type)
#     NameError:
#      undefined local variable or method `alert_type' for #<RSpec::ExampleGroups::PulsePayloadBaseballBattingNow::AlertType:0x0000000a6ef370>
#    Shared Example Group: "BlueprintBase" called from ./spec/new_pulse/pulse/payload/baseball/batting_now_spec.rb:4
#    # ./spec/new_pulse/pulse/shared/blueprint_base.rb:18:in `block (3 levels) in <top (required)>'