module Minitest::Guard

def jruby? platform = RUBY_PLATFORM
  "java" == platform
end

def mri? platform = RUBY_DESCRIPTION
  platform.start_with? "ruby"
end

def osx? platform = RUBY_PLATFORM
  platform.include? "darwin"
end

def windows? platform = RUBY_PLATFORM
  /mswin|mingw/.match? platform
end