gistfile1.rb

# I should see that challenge
# I should see a challenge
# I should not see any challenges
# I should see a challenge issued to me by erica
# I should see a challenge called "whatever" issued to me by erica
# I should see that I am participating in that challenge
Then /^I (should|should not)? see (a|any|that|that I am participating in (?:a|that)) challenge(?:s)?(?: called "([^\"]+)")?(?: issued to me by (\w+))?$/ do |should, what, called, issuer|
  tag = what.match(/^that I am participating in/) ? '#participating .challenge .header' : '.challenge .header'
  title = @challenge.title if what.match(/that/)
  title = called if called.present?
  html = begin
    if issuer.present? and title.present?
      /#{title}.*#{issuer}/
    elsif issuer.present? and !title.present?
      /#{issuer}/
    elsif !issuer.present? and title.present?
      /#{title}/
    end
  end
  response.send should.sub(' ','_').to_sym, have_tag(tag, html)
end