ruby--ruby/spec/ruby/core/io/lines_spec.rb

# -*- encoding: utf-8 -*-
require_relative '../../spec_helper'
require_relative 'fixtures/classes'

ruby_version_is ''...'3.0' do
  describe "IO#lines" do
    before :each do
      @io = IOSpecs.io_fixture "lines.txt"
      @verbose, $VERBOSE = $VERBOSE, nil
    end

    after :each do
      $VERBOSE = @verbose
      @io.close if @io
    end

    it "returns an Enumerator" do
      @io.lines.should be_an_instance_of(Enumerator)
    end

    describe "when no block is given" do
      it "returns an Enumerator" do
        @io.lines.should be_an_instance_of(Enumerator)
      end

      describe "returned Enumerator" do
        describe "size" do
          it "should return nil" do
            @io.lines.size.should == nil
          end
        end
      end
    end

    it "returns a line when accessed" do
      enum = @io.lines
      enum.first.should == IOSpecs.lines[0]
    end

    it "yields each line to the passed block" do
      ScratchPad.record []
      @io.lines { |s| ScratchPad << s }
      ScratchPad.recorded.should == IOSpecs.lines
    end
  end
end