# -*- encoding: utf-8 -*-
require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)

ruby_version_is '1.8.7' do
  describe "IO#getbyte" do
    before :each do
      @kcode, $KCODE = $KCODE, "utf-8"
      @io = IOSpecs.io_fixture "lines.txt"
    end

    after :each do
      @io.close unless @io.closed?
      $KCODE = @kcode
    end

    it "returns the next byte from the stream" do
      @io.readline.should == "Voici la ligne une.\n"
      letters = @io.getbyte, @io.getbyte, @io.getbyte, @io.getbyte, @io.getbyte
      letters.should == [81, 117, 105, 32, 195]
    end

    it "returns nil when invoked at the end of the stream" do
      @io.read
      @io.getbyte.should == nil
    end

    it "raises an IOError on closed stream" do
      lambda { IOSpecs.closed_io.getbyte }.should raise_error(IOError)
    end
  end

  describe "IO#getbyte" do
    before :each do
      @io = IOSpecs.io_fixture "empty.txt"
    end

    after :each do
      @io.close
    end

    it "returns nil on empty stream" do
      @io.getbyte.should == nil
    end
  end
end