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  | 
require 'testing_env'
require 'keg'
require 'stringio'
class LinkTests < Test::Unit::TestCase
  include FileUtils
  def setup
    @keg = HOMEBREW_CELLAR/"foo/1.0"
    @keg.mkpath
    (@keg/"bin").mkpath
    %w{hiworld helloworld goodbye_cruel_world}.each do |file|
      touch @keg/"bin/#{file}"
    end
    @keg = Keg.new(@keg)
    @mode = OpenStruct.new
    @old_stdout = $stdout
    $stdout = StringIO.new
    mkpath HOMEBREW_PREFIX/"bin"
    mkpath HOMEBREW_PREFIX/"lib"
  end
  def test_linking_keg
    assert_equal 3, @keg.link
  end
  def test_unlinking_keg
    @keg.link
    assert_equal 4, @keg.unlink
  end
  def test_link_dry_run
    @mode.dry_run = true
    assert_equal 0, @keg.link(@mode)
    assert !@keg.linked?
    ['hiworld', 'helloworld', 'goodbye_cruel_world'].each do |file|
      assert_match "#{HOMEBREW_PREFIX}/bin/#{file}", $stdout.string
    end
    assert_equal 3, $stdout.string.lines.count
  end
  def test_linking_fails_when_already_linked
    @keg.link
    assert_raise RuntimeError do
      shutup { @keg.link }
    end
  end
  def test_linking_fails_when_files_exist
    touch HOMEBREW_PREFIX/"bin/helloworld"
    assert_raise RuntimeError do
      shutup { @keg.link }
    end
  end
  def test_link_overwrite
    touch HOMEBREW_PREFIX/"bin/helloworld"
    @mode.overwrite = true
    assert_equal 3, @keg.link(@mode)
  end
  def test_link_overwrite_broken_symlinks
    cd HOMEBREW_PREFIX/"bin" do
      ln_s "nowhere", "helloworld"
    end
    @mode.overwrite = true
    assert_equal 3, @keg.link(@mode)
  end
  def test_link_overwrite_dryrun
    touch HOMEBREW_PREFIX/"bin/helloworld"
    @mode.overwrite = true
    @mode.dry_run = true
    assert_equal 0, @keg.link(@mode)
    assert !@keg.linked?
    assert_equal "#{HOMEBREW_PREFIX}/bin/helloworld\n", $stdout.string
  end
  def test_unlink_prunes_empty_toplevel_directories
    mkpath HOMEBREW_PREFIX/"lib/foo/bar"
    mkpath @keg/"lib/foo/bar"
    touch @keg/"lib/foo/bar/file1"
    @keg.unlink
    assert !File.directory?(HOMEBREW_PREFIX/"lib/foo")
  end
  def test_unlink_ignores_DS_Store_when_pruning_empty_dirs
    mkpath HOMEBREW_PREFIX/"lib/foo/bar"
    touch HOMEBREW_PREFIX/"lib/foo/.DS_Store"
    mkpath @keg/"lib/foo/bar"
    touch @keg/"lib/foo/bar/file1"
    @keg.unlink
    assert !File.directory?(HOMEBREW_PREFIX/"lib/foo")
    assert !File.exist?(HOMEBREW_PREFIX/"lib/foo/.DS_Store")
  end
  def teardown
    @keg.unlink
    @keg.rmtree
    $stdout = @old_stdout
    rmtree HOMEBREW_PREFIX/"bin"
    rmtree HOMEBREW_PREFIX/"lib"
  end
end
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