Added public attributes 'address' and 'port' to Dns::Server.

This removes the need to search config.yaml for the address:port.
Also included unit tests.

extensions/dns/dns.rb

@@ -17,6 +17,8 @@ module Dns
 
     include Singleton
 
+    attr_reader :address, :port
+
     # @!method self.instance
     #  Returns the singleton instance. Use this in place of {#initialize}.
 
@@ -32,6 +34,9 @@ module Dns
     # @param address [String] interface address server should run on
     # @param port [Integer] desired server port number
     def run_server(address = '0.0.0.0', port = 5300)
+      @address = address
+      @port = port
+
       @lock.synchronize do
         Thread.new do
           # @note Calling #sleep is a quick fix that prevents race conditions
@@ -40,9 +45,9 @@ module Dns
           sleep(1)
 
           if EventMachine.reactor_running?
-            EventMachine.next_tick { run_server_block(address, port) }
+            EventMachine.next_tick { run_server_block(@address, @port) }
           else
-            run_server_block(address, port)
+            run_server_block(@address, @port)
           end
         end
       end

test/unit/extensions/tc_dns.rb

@@ -55,13 +55,16 @@ class TC_Dns < Test::Unit::TestCase
     assert_respond_to(@@dns, :remove_ruleset)
   end
 
-  # Starts DNS server (does not test anything)
+  # Tests that DNS server runs correctly on desired address and port
   def test_04_run_server
     address = @@dns_config['address']
     port    = @@dns_config['port']
 
     @@dns.run_server(address, port)
     sleep(3)
+
+    assert_equal(address, @@dns.address)
+    assert_equal(port, @@dns.port)
   end
 
   # Tests procedure for properly adding new DNS rules
@@ -251,22 +254,14 @@ class TC_Dns < Test::Unit::TestCase
     assert_equal(expected[:response], rule[:response][0])
   end
 
-  # Compares output of dig command against regex
-  def check_dns_response(regex, type, pattern)
-    address = @@dns_config['address']
-    port    = @@dns_config['port']
-
-    dig_output = `dig @#{address} -p #{port} -t #{type} #{pattern}`
-    assert_match(regex, dig_output)
-  end
-
   # Confirms that a query for the rule given in 'id' returns a 'type' failure status
   def check_failure_status(id, type)
     rule   = @@dns.get_rule(id)
     status = type.to_s.force_encoding('UTF-8').upcase
-
     assert_equal(status, rule[:response][0])
-    check_dns_response(/status: #{status}/, rule[:type], rule[:pattern])
+
+    dig_output = `dig @#{@@dns.address} -p #{@@dns.port} -t #{rule[:type]} #{rule[:pattern]}`
+    assert_match(/status: #{status}/, dig_output)
   end
 
 end