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require 'singleton'
module EmailSpec
class AddressConverter
include Singleton
attr_accessor :converter
# The block provided to conversion should convert to an email
# address string or return the input untouched. For example:
#
# EmailSpec::AddressConverter.instance.conversion do |input|
# if input.is_a?(User)
# input.email
# else
# input
# end
# end
#
def conversion(&block)
self.converter = block
end
def convert(input)
return input unless converter
converter.call(input)
end
end
end
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