OK. I’m learning Ruby by going through the examples in Programming Ruby
by Dave T… Somehow I’m stuck and I cannot progress further. I
have 3 files all in the same folder – Song.rb, SongList.rb and
TestSongList.rb. Code is as follows:
Song.rb
class Song
attr_reader :name, :artist, :duration
attr_writer :duration
@@plays=0
def initialize(name,artist,duration)
@name=name
@artist=artist
@duration=duration
@plays=0
end
end
SongList.rb
def SongList
def initialize
@songs = Array.new
end
def append(song)
@songs.push(song)
self
end
end
TestSongList.rb
require ‘test/unit’
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])
end
end
So I run the test and I get this:
[ookman@foorubyfiles]$ ruby ./TestSongList.rb
Loaded suite ./TestSongList
Started
E
Finished in 0.000414 seconds.
- Error:
test_delete(TestSongList):
NameError: uninitialized constant TestSongList::SongList
./TestSongList.rb:4:in `test_delete’
1 tests, 0 assertions, 0 failures, 1 errors
Can anybody tell me why it’s giving me the above error on this line?
list = SongList.new
I’ve tried to do:
require ‘SongList’ at the top of TestSongList.rb but I get the same
error. I’ve Googled this problem but I cannot find a resolution. I also
tried to run the TestSongList code one line at a time in irb and it
gives me the same error when it reaches line 4.
Ruby version is:
ruby 1.8.6 (2007-03-13 patchlevel 0) [i686-linux]
I appreciate any insight … TIA!
