From: Dark Ambient <sambient@...>
Date: 2006-07-05T21:22:02+09:00
Subject: Re: Pickaxe code error

Back again on this one, still getting a test delete failure.
1) Failure:
test_delete(TestSongList) [pickaxe_p23.rb:137]:
<#<Song:0x28a2d58 @artist="artist1", @duration=1, @name="title1">>
expected but was
<nil>.

Not sure what this means exactly?

Anyone else have this issue or remember the section of the book ?

Stuart

1 tests, 1 assertions, 1 failures, 0 errors

On 7/5/06, Dark Ambient <sambient@gmail.com> wrote:
> Just realized that this needed to be in with the rest of the previous
> jukebox code.
> Sorry   - ignore.
>
> Stuart
>
> On 7/5/06, Dark Ambient <sambient@gmail.com> wrote:
> > Not sure what's going on with some code in Programming Ruby, it's
> > early on where a SongList container is being created and test units
> > are run.
> > I'm receiving this error:
> >
> >   1) Error:
> > test_delete(TestSongList):
> > NameError: uninitialized constant TestSongList::Song
> >     pickaxe_SongListContainer.rb:52:in `test_delete'
> >
> > the rb:52 won't be right as I've put notes in comments between the
> > code, which I'm stripping here.  Perhaps someone is familiar with
> > example.  I checked errata with no luck..TIA
> >
> > require 'test/unit'
> >
> > class SongList
> >   def initialize
> >     @songs = Array.new
> >   end
> >
> >   def append(song)
> >     #songs.push(song)
> >     self
> >   end
> >
> >   def delete_first
> >     @songs.shift
> >   end
> >
> >   def delete_last
> >     @songs.pop
> >   end
> >
> >   def [](index)
> >     @songs[index]
> >   end
> > end
> >
> >
> > class TestSongList < Test::Unit::TestCase
> >   def test_delete
> >     list = SongList.new
> >     s1 = Song.new('title1', 'artist1', 1)
> >     s2 = Song.new('title2', 'artist2', 2)
> >     s3 = Song.new('title3', 'artist3', 3)
> >     s4 = Song.new('title4', 'artist4', 4)
> >
> >     list.append(s1).append(s2).append(s3).append(s4)
> >
> >     assert_equal(s1, list[0])
> >     assert_equal(s3, list[2])
> >     assert_nil(list[9])
> >
> >     assert_equal(s1,  list.delete_first)
> >     assert_equal(s2,  list.delete_first)
> >     assert_equal(s4,  list.delete_last)
> >     assert_equal(s3,  list.delete_last)
> >     assert_nil(list.delete_last)
> >   end
> > end
> >
> >
>
>