Helper render_breadcrumbs okay in dev env but not found by cucumber

I am using breadcrumbs_on_rails v1.0.1 in a Rails 2.3.10 app by including the gem in my Gemfi开发者_Python百科le. In my development environment I see no problems at all - the views render as expected. In my cucumber tests though, I get the following:

undefined local variable or method `render_breadcrumbs' for #<ActionView::Base:0x1034c46f0> (ActionView::TemplateError)

1: = render_breadcrumbs

I've also tried to use

config.gem "breadcrumbs_on_rails"

in my config/environment.rb instead of including the gem in my Gemfile. I've also tried explicitly including BreadcrumbsOnRails in my spec_helper.rb without luck.

Confused as to why the render_breadcrumbs helper is found in the dev environment but not in test.

I'm not sure why it would be working in development and not in cucumber, but render_breadcrumbs is provided by BreadcrumbsOnRails::ControllerMixin.

The breadcrumbs_on_rails README suggests including that mixin in ApplicationController, though it suggests this specifically for Rails 3 compatibility. It's still worth a try if nothing else is working.