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POTest Driven Design for iPhone Native apps
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copied!<p>I'm experimenting with the iPhone SDK and doing some TDD ala Dr. Nic's rbiPhoneTest project. I'm wondering how many, if any, have been successful using this or any other testing framework for iPhone/Cocoa? More important, I'd like to know how to best assert a proprietary binary request/response protocol. The idea is to send a binary request over the network and receive a binary response. Requests and responses are created using byte and'ing and or'ing. I'm using the golden copy pattern to test my request. Here's what I have so far. Don't laugh as I'm new to btoh Objective C and Ruby:</p> <pre><code>require File.dirname(__FILE__) + '/test_helper' require 'fileutils' require 'io' require "MyModel.bundle" OSX::ns_import :MyModel module MyTestExtensions def is_absolute_path(path) return /^\/.*/.match(path) end def parent_directory(file) dir = file if(! is_absolute_path(dir)) dir = File.expand_path(dir) end dir = File.dirname(dir) assert is_absolute_path(dir), "Expecting an absolute path with #{dir}" return dir end def assert_NSData_contains_bytes_from_file(file, data) assert_not_nil data, "Data should not be nil." assert data.bytes, "data should have bytes" data.length.times { |i| expected = file.getc assert_not_nil expected, "Expected only #{i} bytes. Actual data contains more." actual = data.bytes.int8_at(i) assert_equal expected, actual, "Bytes should be equal at offset #{i} expected #{expected.chr} but was #{actual.chr}" } expected = file.getc raise AssertionFailedError, "Expecting #{expected.chr} at offset #{data.length}" unless expected == nil end end class TestMyModel < Test::Unit::TestCase include OSX include MyTestExtensions def this_files_dir return parent_directory(__FILE__) end def setup @expectedReq = File.new("#{this_files_dir}/ExpectedMyReq") # @expectedReq = File.new("#{this_files_dir}/hello.txt") assert File.exist?("#{this_files_dir}/ExpectedMyReq"), "The file [#{@expectedReq.path}] should exist." end def test_my_model_class_exists MyModel end def test_can_init_instance assert MyModel.instancesRespondToSelector(:init), "MyModel Should define :init" end def test_my_model_can_request_my_data myModel = MyModel.alloc.init data = myModel.requestMyData 'Some query text' assert_NSData_contains_bytes_from_file @expectedReq, data end end </code></pre>

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