module ViewComponent::TestHelpers

def __vc_test_helpers_preview_class
  result = if respond_to?(:described_class)
    raise ArgumentError.new("`render_preview` expected a described_class, but it is nil.") if described_class.nil?
    "#{described_class}Preview"
  else
    self.class.name.gsub("Test", "Preview")
  end
  result = result.constantize
rescue NameError
  raise NameError, "`render_preview` expected to find #{result}, but it does not exist."
end