115 lines
2 KiB
Ruby
115 lines
2 KiB
Ruby
module Mutant
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# Represent a mutated node with its subject
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class Mutation
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include AbstractType, Adamantium::Flat
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include Concord::Public.new(:subject, :node)
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# Return mutated root node
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#
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# @return [Parser::AST::Node]
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#
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# @api private
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#
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def root
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subject.root(node)
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end
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memoize :root
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# Test if killer is successful
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#
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# @param [Killer] killer
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#
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# @return [true]
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# if killer is successful
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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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abstract_method :success?
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# Indicate if a killer should treat a kill as problematic
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#
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# @return [true]
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# if killing is unexpected
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#
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# @return [false]
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# if killing is expected
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#
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# @api private
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#
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abstract_method :should_survive?
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# Insert mutated node
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#
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# FIXME: Cache subject visibility in a better way! Ideally dont mutate it
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# implicitly. Also subject.public? should NOT be a public interface it
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# is a detail of method mutations.
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#
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# @return [self]
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#
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# @api private
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#
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def insert
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subject.public?
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Loader::Eval.run(root, subject)
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self
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end
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# Return identification
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#
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# @return [String]
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#
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# @api private
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#
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def identification
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"#{subject.identification}:#{code}"
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end
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memoize :identification
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# Return mutation code
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#
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# @return [String]
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#
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# @api private
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#
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def code
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sha1[0..4]
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end
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memoize :code
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# Return sha1 sum of source and subject identification
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#
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# @return [String]
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#
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# @api private
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#
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def sha1
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Digest::SHA1.hexdigest(subject.identification + 0.chr + source)
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end
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memoize :sha1
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# Return source
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#
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# @return [String]
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#
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# @api private
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#
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def source
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Unparser.unparse(node)
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end
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memoize :source
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# Return original source
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#
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# @return [String]
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#
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# @api private
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#
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def original_source
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subject.source
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end
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end # Mutation
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end # Mutant
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