Mock the create_queue call.

lib/fog/rackspace/queues.rb

@@ -90,14 +90,30 @@ module Fog
       class Mock < Fog::Rackspace::Service
         include Common
 
+        # An in-memory Queue implementation.
+        class MockQueue
+          attr_accessor :metadata
+
+          def initialize
+            @metadata = {}
+          end
+        end
+
         def initialize(options = {})
           apply_options(options)
           authenticate
           endpoint_uri
         end
 
-        def request(params)
-          Fog::Mock.not_implemented
+        # FIXME Refactor commonalities from Fog::Rackspace::Storage to... somewhere.
+        def self.data
+          @data ||= Hash.new do |hash, key|
+            hash[key] = {}
+          end
+        end
+
+        def data
+          self.class.data[@rackspace_username]
         end
       end
 

lib/fog/rackspace/requests/queues/create_queue.rb

@@ -1,8 +1,8 @@
 module Fog
   module Rackspace
     class Queues
-      class Real
 
+      class Real
         # This operation creates a new queue.
         # The body of the request is empty.
         #
@@ -22,6 +22,21 @@ module Fog
           )
         end
       end
+
+      class Mock
+        def create_queue(queue_name)
+          existed = ! data[queue_name].nil?
+
+          unless existed
+            data[queue_name] = MockQueue.new
+          end
+
+          response = Excon::Response.new
+          response.status = existed ? 201 : 204
+          response
+        end
+      end
+
     end
   end
 end