Added test case for starting rails with daemon option, this should set the...

Added test case for starting rails with daemon option, this should set the option[:daemonize] to true, otherwise the option[:daemonize] will be set to false

railties/test/commands/server_test.rb

@@ -22,6 +22,18 @@ def test_environment_without_server_option
     assert_nil options[:server]
   end
 
+  def test_server_option_with_daemon
+    args = ["-d"]
+    options = parse_arguments(args)
+    assert_equal true, options[:daemonize]
+  end
+
+  def test_server_option_without_daemon
+    args = []
+    options = parse_arguments(args)
+    assert_equal false, options[:daemonize]
+  end
+
   def test_server_option_without_environment
     args = ["thin"]
     with_rack_env nil do