Rails - Sep 2007 - Helper for testing default routes generated by a resource

Snippet posted to: http://snippets.dzone.com/posts/show/4517

These methods test that the routes for resources defined in routes.rb
are working as expected. Call them from your functional (controller)
tests.

Add the following 3 methods to test/test_helper.rb:

# Test for routes generated by map.resource (singular).
def assert_routing_for_resource(controller, skip=[], nesting=[])
  routes = [
    ["new",''/new'',{},:get],
["create",'''',{},:post],
    ["show",'''',{},:get],
["edit",'';edit'',{},:get],
    ["update",'''',{},:put],
["destroy",'''',{},:delete]
    ]
  check_resource_routing(controller, routes, skip, nesting)
end
# Test for routes generated by map.resources (plural).
def assert_routing_for_resources(controller, skip=[], nesting=[])
  routes = [
    ["index",'''',{},:get],
["new",''/new'',{},:get],
["create",'''',
{},:post],
   
["show",''/1'',{:id=>''1''},:get],
["edit",''/1;edit'',{:id=>''1''},:get],
   
["update",''/1'',{:id=>''1''},:put],
["destroy",''/1'',
{:id=>''1''},:delete]
    ]
  check_resource_routing(controller, routes, skip, nesting)
end

# Check that the expected paths will be generated by a resource, and
that
# the expected params will be generated by paths defined by a
resource.
# routes is array of [action, url string after controller, extra
params].
def check_resource_routing(controller, routes, skip=[], nesting=[])
  # set a prefix for nested resources
  prefix = nesting.join(''s/1/'')
  unless prefix.blank?
    prefix += "s/1/"
  end
  # Add params for nested resources.
  # For each ''nest'', include a
":nest_id=>''1''" param.
  params = {}
  nesting.each do |param|
    params["#{param}_id".to_sym] = ''1''
  end
  # Test each of the standard resource routes.
  routes.each do |pair|
    unless skip.include? pair[0]
      assert_generates("/#{prefix}#{controller}#{pair[1]}",
        {:controller=>controller,
        :action=>pair[0]}.merge(pair[2]).merge(params), {}, {},
        "Failed generation of resource route for action #{pair[0]} /
#{prefix}#{controller}#{pair[1]}")
      assert_recognizes(
        {:controller=>controller,
          :action=>pair[0]}.merge(pair[2]).merge(params),
        {:path=>"/
#{prefix}#{controller}#{pair[1]}", :method=>pair[3]},
        {}, "Failed to recognize resource route for path #{pair[3]}:/
#{prefix}#{controller}#{pair[1]}")
    end
  end
end


EXAMPLES

You can specify actions to ''skip'' (if you have a special route
for
that action).
If using nested resources, set the nesting array (use singular
strings).

So, if you have the following in routes.rb:
  map.make_thing ''/make'',
:controller=>''things'', :action=>''new''
  map.resources :nests do |nest|
    nest.resources :things
  end
  map.resource :foo

then you can use the following in things_controller_test.rb:
  def test_resource_routing
    assert_routing_for_resources ''things'',
[''new''], [''nest'']
    assert_routing_for_resource ''foo''
  end


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