# File lib/shoulda/assertions.rb, line 36
36:     def assert_does_not_contain(collection, x, extra_msg = "")
37:       collection = [collection] unless collection.is_a?(Array)
38:       msg = "#{x.inspect} found in #{collection.to_a.inspect} " + extra_msg
39:       case x
40:       when Regexp
41:         assert(!collection.detect { |e| e =~ x }, msg)
42:       else
43:         assert(!collection.include?(x), msg)
44:       end
45:     end