86 lines
1.8 KiB
Ruby
86 lines
1.8 KiB
Ruby
# encoding: utf-8
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module Mutant
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class Predicate
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# Base class for predicates on object attributes
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class Attribute < self
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include Concord.new(:attribute_name, :expectation)
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private
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# Return value for object
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#
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# @param [Object] object
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#
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# @return [Object]
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#
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# @api private
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#
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def value(object)
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object.public_send(attribute_name)
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end
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# Regexp based attribute predicate
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class Regexp < self
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# Test for match
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#
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# @param [Object] object
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#
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# @return [true]
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# if attribute value matches expectation
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#
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# @return [false]
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# otherwise
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#
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# @api private
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#
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def match?(object)
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!!(expectation =~ value(object))
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end
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end # Regexp
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# Equality based attribute predicate
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class Equality < self
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# Test for match
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#
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# @param [Object] object
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#
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# @return [true]
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# if attribute value matches expectation
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#
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# @return [false]
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# otherwise
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#
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# @api private
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#
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def match?(object)
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expectation.eql?(value(object))
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end
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PATTERN = /\A(code):([a-f0-9]{1,6})\z/.freeze
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# Test if class handles string
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#
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# @param [String] notation
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#
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# @return [Filter]
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# if notation matches pattern
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#
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# @return [nil]
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# otherwise
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#
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# @api private
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#
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def self.handle(notation)
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match = PATTERN.match(notation)
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return unless match
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new(match[1].to_sym, match[2])
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end
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end # Equality
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end # Attribute
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end # Filter
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end # Mutant
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