# contents of test/fixtures/authors---xandr: id: 1 name: xandros# contents of test/unit/test_authors:require File.dirname(__FILE__) + '/../test_helper'class AuthorTest < Test::Unit::TestCase fixtures :authors def setup @xandr= @authors["xandr"] end # Replace this with your real tests. def test_truth # assert_kind_of Author, @authors["xandr"] # ===> also failure if I comment the line in setup assert_kind_of Author, @xandr endend# error: 1) Error:test_truth(AuthorTest):NoMethodError: You have a nil object when you didn't expect it!You might have expected an instance of Array.The error occured while evaluating nil.[] ./test/unit/author_test.rb:7:in `setup_without_fixtures' /usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/fixtures.rb:548:in `setup'