rubyx/test/arm/helper.rb

require 'rubygems'
require 'bundler'
begin
  Bundler.setup(:default, :development)
rescue Bundler::BundlerError => e
  $stderr.puts e.message
  $stderr.puts "Run `bundle install` to install missing gems"
  exit e.status_code
end

if ENV['CODECLIMATE_REPO_TOKEN']
  require 'simplecov'
  SimpleCov.start
end

require "minitest/autorun"
require "minitest/unit"

$LOAD_PATH.unshift(File.join(File.dirname(__FILE__), '..', 'test'))

require 'salama'

# try  to test that the generation of basic instructions works
# one instruction at a time, reverse testing from objdump --demangle -Sfghxp
# tests are named as per assembler code, ie test_mov testing mov instruction

module ArmHelper
  def setup
    @machine = Arm::ArmMachine
  end

  # code is what the generator spits out, at least one instruction worth (.first)
  # the op code is wat was witten as assembler in the first place and the binary result
  def assert_code code , op , should
    assert_equal op ,  code.opcode
    io = StringIO.new
    code.assemble(io)
    binary = io.string
    assert_equal should.length , binary.length , "code length wrong for #{code.inspect}"
    index = 0
    binary.each_byte do |byte |
      assert_equal should[index] , byte , "byte #{index} 0x#{should[index].to_s(16)} != 0x#{byte.to_s(16)}"
      index += 1
    end
  end
end