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require_relative 'data_modifier/enum'
require_relative 'data_modifier/hash'
module Support
module DataModifier
module InstanceMethods
CannotModify = Class.new RuntimeError
def advance_values(atts, *keys)
keys.inject(atts){ |h, k| h.merge( k => atts[k].next) }
end
# return array of atts wich each value modified, unboxing
# values if needed
def modify_atts(base_atts)
base_atts.keys.map do | key |
modify_att base_atts, key
end.compact
end
private
def modify_att atts, key
atts.merge(key => modify_value(atts[key]))
rescue CannotModify
nil
end
def modify_value value
case value
when String
"#{value}."
when Fixnum
value + 1
when TrueClass
false
when FalseClass
true
when Float
value * 1.1
when Date
value + 1.day
when Box
value.next.value
else
raise CannotModify
end
end
end
end
end
RSpec.configure do | c |
c.include Support::DataModifier::InstanceMethods, type: :checksum
c.include Support::DataModifier::InstanceMethods, type: :model
end
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