Add couchbase with modifications, formalize broadcaster and make testable and some other stuff

spec/support/matchers/broadcast_to_user_matcher.rb

@@ -0,0 +1,49 @@
+module Matchers
+  class BroadcastToUser
+    class TestBroadcaster
+      attr_reader :broadcasts
+
+      def initialize
+        @broadcasts = []
+      end
+
+      def broadcast(object)
+        self.broadcasts << object
+      end
+    end
+
+    def initialize(user_id)
+      @user_id = user_id
+    end
+
+    def matches?(block)
+      old_broadcaster = Qwaiter.broadcaster
+      test_broadcaster = TestBroadcaster.new
+      Qwaiter.broadcaster = test_broadcaster
+      block.call
+      Qwaiter.broadcaster = old_broadcaster
+
+      relevant_broadcasts = test_broadcaster.broadcasts.select{|b| b[:channel] =~ /^\/user\/#{@user_id}/ && b[:data][:event] == @message}
+      @failure_debug_content = "was #{relevant_broadcasts.map{|b| b[:data][:data].inspect}.join(" and ")}"
+      relevant_broadcasts.any?{|b| b[:data][:data] == @target_object}
+    end
+
+    def message(msg)
+      @message = msg
+      self
+    end
+
+    def with(target_object)
+      @target_object = target_object
+      self
+    end
+
+    def failure_message
+      "user #{@user_id} did not receive broadcast #{@message} with #{@target_object.inspect} #{@failure_debug_content}"
+    end
+  end
+
+  def broadcast_to_user(*args, &block)
+    BroadcastToUser.new(*args, &block)
+  end
+end