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# frozen_string_literal: true
module Benchmark
module Memory
class Report
# Compare entries against each other.
class Comparison
extend Forwardable
# Instantiate a new comparison.
#
# @param entries [Array<Entry>] The entries to compare.
# @param comparator [Comparator] The comparator to use when generating.
def initialize(entries, comparator)
@entries = entries.sort_by(&comparator)
@comparator = comparator
end
# @return [Comparator] The {Comparator} to use when generating the {Comparison}.
attr_reader :comparator
# @return [Array<Entry>] The entries to compare.
attr_reader :entries
# @!method metric
# @return [Symbol] The metric to compare, one of `:memory`, `:objects`, or `:strings`
# @!method value
# @return [Symbol] The value to compare, one of `:allocated` or `:retained`
def_delegators :@comparator, :metric, :value
# Check if the comparison is possible
#
# @return [Boolean]
def possible?
entries.size > 1
end
end
end
end
end
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