[Passing an argument to shared examples in RSpec] Here's a VCR example

README.md

let is not available in the scope of the shared example group definition, but only in the example (it, specify, scenario) scope.

To pass cassette_name to the shared examples, you can use a method argument instead of let. Here's how you can modify your shared examples and usage:

RSpec.shared_examples 'a vehicle' do |opts|
  use_vcr_cassette(opts[:cassette_name])
end

And then use it like this:

it_behaves_like 'a vehicle', cassette_name: 'models/truck' do
  let(:factory_name) { :truck }
end

In this way, 'models/truck' is passed as an argument to the shared example group and can be used directly.