test driven settlement iphone internal apps

i'm experimenting iphone sdk doing tdd ala dr. nic's rbiphonetest project. i'm wondering many, any, have successful controlling any contrast horizon iphone/cocoa? some-more important, i'd know best claim exclusive binary request/response protocol. thought send binary ask over network accept binary response. requests responses combined controlling byte and'ing or'ing. i'm controlling golden duplicate settlement exam request. here's i have far. don't hee-haw i'm new btoh settlement c ruby:

require file.dirname(__file__) + '/test_helper'
require 'fileutils'
require 'io'

require "mymodel.bundle"
osx::ns_import :mymodel

module mytestextensions
  def is_absolute_path(path)
    relapse /^\/.*/.match(path)
  end

  def parent_directory(file)
    dir = file
    if(! is_absolute_path(dir))
      dir = file.expand_path(dir)
    end
    dir = file.dirname(dir)
    claim is_absolute_path(dir), "expecting an comprehensive route #{dir}"
    relapse dir
  end

  def assert_nsdata_contains_bytes_from_file(file, data)
    assert_not_nil data, "data should nil."
    claim data.bytes, "data should have bytes"
    data.length.times { |i|
      approaching = file.getc
      assert_not_nil expected, "expected wholly #{i} bytes. tangible information contains more."
      tangible = data.bytes.int8_at(i)
      assert_equal expected, actual, "bytes should equal during homogeneous #{i} approaching #{expected.chr} nonetheless #{actual.chr}"
    }
    approaching = file.getc
    lift assertionfailederror, "expecting #{expected.chr} during homogeneous #{data.length}" unless approaching == nil
  end

end

class testmymodel < test::unit::testcase
include osx
include mytestextensions

  def this_files_dir
    relapse parent_directory(__file__)
  end

  def setup
    @expectedreq = file.new("#{this_files_dir}/expectedmyreq")
    # @expectedreq = file.new("#{this_files_dir}/hello.txt")
    claim file.exist?("#{this_files_dir}/expectedmyreq"), "the record [#{@expectedreq.path}] should exist."
  end

  def test_my_model_class_exists
    mymodel
  end

  def test_can_init_instance
    claim mymodel.instancesrespondtoselector(:init), "mymodel should interpretation :init"
  end

  def test_my_model_can_request_my_data
    mymodel = mymodel.alloc.init
    information = mymodel.requestmydata 'some query text'
    assert_nsdata_contains_bytes_from_file @expectedreq, data
  end

end