Add support for delayed message exchange

lib/bunny-mock.rb

@@ -17,6 +17,7 @@
 require 'bunny_mock/exchanges/topic'
 require 'bunny_mock/exchanges/fanout'
 require 'bunny_mock/exchanges/headers'
+require 'bunny_mock/exchanges/x_delayed_message'
 
 ##
 # A mock RabbitMQ client based on Bunny

lib/bunny_mock/exchange.rb

@@ -22,7 +22,7 @@ def declare(channel, name = '', opts = {})
         type = opts.fetch :type, :direct
 
         # get needed class type
-        klazz = BunnyMock::Exchanges.const_get type.to_s.capitalize
+        klazz = BunnyMock::Exchanges.const_get type.to_s.gsub('-', '_').camelize(:upper)
 
         # create exchange of desired type
         klazz.new channel, name, type, opts

lib/bunny_mock/exchanges/x_delayed_message.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+module BunnyMock
+  module Exchanges
+    class XDelayedMessage < BunnyMock::Exchange
+      #
+      # API
+      #
+
+      ##
+      # Deliver a message to route with direct key match
+      #
+      # @param [Object] payload Message content
+      # @param [Hash] opts Message properties
+      # @param [String] key Routing key
+      #
+      # @api public
+      #
+      def deliver(payload, opts, key)
+        @routes[key].each { |route| route.publish payload, opts } if @routes[key]
+      end
+    end
+  end
+end