## smoke.rb

describe "smoke test" do
  b = nil
  b.nil?.should == true
  b.should be_nil
end

## results

Phoenix [ruby:1.8.7:p174] ~/scratch  $ spec smoke.rb
./smoke.rb:4: undefined local variable or method `be_nil' for Spec::Example::ExampleGroup::Subclass_1:Class (NameError)
	from /Users/mike/.rvm/gems/ruby/1.8.7/gems/rspec-1.2.9/lib/spec/example/example_group_methods.rb:183:in `module_eval'
	from /Users/mike/.rvm/gems/ruby/1.8.7/gems/rspec-1.2.9/lib/spec/example/example_group_methods.rb:183:in `subclass'
	from /Users/mike/.rvm/gems/ruby/1.8.7/gems/rspec-1.2.9/lib/spec/example/example_group_methods.rb:55:in `describe'
	from /Users/mike/.rvm/gems/ruby/1.8.7/gems/rspec-1.2.9/lib/spec/example/example_group_factory.rb:31:in `create_example_group'
	from /Users/mike/.rvm/gems/ruby/1.8.7/gems/rspec-1.2.9/lib/spec/dsl/main.rb:28:in `describe'
	from ./smoke.rb:1
	from /Users/mike/.rvm/gems/ruby/1.8.7/gems/rspec-1.2.9/lib/spec/runner/example_group_runner.rb:15:in `load'
	from /Users/mike/.rvm/gems/ruby/1.8.7/gems/rspec-1.2.9/lib/spec/runner/example_group_runner.rb:15:in `load_files'
	from /Users/mike/.rvm/gems/ruby/1.8.7/gems/rspec-1.2.9/lib/spec/runner/example_group_runner.rb:14:in `each'
	from /Users/mike/.rvm/gems/ruby/1.8.7/gems/rspec-1.2.9/lib/spec/runner/example_group_runner.rb:14:in `load_files'
	from /Users/mike/.rvm/gems/ruby/1.8.7/gems/rspec-1.2.9/lib/spec/runner/options.rb:132:in `run_examples'
	from /Users/mike/.rvm/gems/ruby/1.8.7/gems/rspec-1.2.9/lib/spec/runner/command_line.rb:9:in `run'
	from /Users/mike/.rvm/gems/ruby/1.8.7/gems/rspec-1.2.9/bin/spec:5
	from /Users/mike/.rvm/gems/ruby/1.8.7/bin/spec:19:in `load'
	from /Users/mike/.rvm/gems/ruby/1.8.7/bin/spec:19