def ab_test(abingo, test_name, alternatives = nil, options = {}, &block)
if (Abingo.options[:enable_specification] && !params[test_name].nil?)
choice = params[test_name]
elsif (Abingo.options[:enable_override_in_session] && !session[test_name].nil?)
choice = session[test_name]
elsif (alternatives.nil?)
choice = abingo.flip(test_name)
else
choice = abingo.test(test_name, alternatives, options)
end
if block
content_tag = capture(choice, &block)
block_called_from_erb?(block) ? concat(content_tag) : content_tag
else
choice
end
end