#In test file
setup do
  load_scenario("bookshop_a")
end

test "Franks has 5 books" do
  assert_equal 5, @frank.books.count
end

#In test helper or some other such solution
def load_scenario(scenario_name)
  create(:bookshop_owner, name:"Frank")
  create(:bookshop, name: "A lotta books")
  create_list(5, :books)
end