[Rails] [Rails 3] No route matches error using RSpec even though route DOES match

I've recently run into a really weird situation that I'm just not sure
what's going on here. I'm trying to write a route that will allow
searches to be done via GET requests (generally a good idea since it's
just retrieving information, helps for links and SEO, etc.), and I
have the route properly set up and can access it in development mode
just fine, but when running the controller spec, it triggers an
ActionController::RoutingError stating that there isn't such a route
that exists.

The route in question:
match '/search/users/:name', :to => 'search#users', :via => :get

The idea is that if a user goes to www.example.com/search/users/John+Doe
that the search controller passes the params: {:name => "John Doe"} to
the "users" action. Indeed, if I run this through my browser, it
works perfectly fine.

The problem is when using RSpec, it doesn't work at all. The
corresponding spec for this is:

require 'spec_helper'

describe SearchController do
before :all do
Codebase::Application.reload_routes!
# a futile attempt to force new routes to be ready, still doesn't
work
end

context "a GET to /users with a name" do
it "should spit out a list of users with that name" do
get :users, :name => URI.escape(User.make.name)
response.should be_success
end
end
end

Instead of getting a success (which I should given that the action
itself is essentially blank - it exists, just nothing inside it, no
before_filters or anything, and a view for it exists), I get:
ActionController::RoutingError: No route matches {:name => "Foo
%20Bar", :controller => "search", :action => "users"}.

Even more insidious, my output from rake routes:
GET /users/:name(.:format)
{:controller=>"search", :action=>"users"}

This could be understandable if I could duplicate the problem for
other controller tests, but they all work fine! All my other
controllers are, so far, set up as REST-based resources, and they work
perfectly with standard things like get :index, or put :update, etc.
No routing errors there.

I don't really see smushing this behavior into a resource set (with
URL-based parameters) as a good idea or a good way to solve this. I'd
like to know how I can get RSpec to play nice with my routes the way
they're supposed to. Any ideas what's going on here?

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