RSpec.describe Dry::Container do let(:klass) { Dry::Container } let(:container) { klass.new } it_behaves_like 'a container' describe 'inheritance' do it 'sets up a container for a child class' do parent = Class.new { extend Dry::Container::Mixin } child = Class.new(parent) parent.register(:foo, 'foo') child.register(:foo, 'foo') expect(parent[:foo]).to_not be(child[:foo]) end end end