spec/ruby/core/dir/fileno_spec.rb


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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/common', __FILE__)

has_dir_fileno = begin
  dir = Dir.new('.')
  dir.fileno
  true
rescue NotImplementedError
  false
rescue Exception
  true
ensure
  dir.close
end

describe "Dir#fileno" do
  before :each do
    @name = tmp("fileno")
    mkdir_p @name
    @dir = Dir.new(@name)
  end

  after :each do
    @dir.close
    rm_r @name
  end

  if has_dir_fileno
    it "returns the file descriptor of the dir" do
      @dir.fileno.should be_kind_of(Fixnum)
    end
  else
    it "raises an error when not implemented on the platform" do
      lambda { @dir.fileno }.should raise_error(NotImplementedError)
    end
  end
end