108 lines
2.1 KiB
Ruby
108 lines
2.1 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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CODE_DELIMITER = "\0".freeze
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CODE_RANGE = (0..4).freeze
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# Identification string
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#
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# @return [String]
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def identification
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"#{self.class::SYMBOL}:#{subject.identification}:#{code}"
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end
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memoize :identification
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# Mutation code
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#
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# @return [String]
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def code
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sha1[CODE_RANGE]
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end
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memoize :code
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# Normalized mutation source
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#
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# @return [String]
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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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# Normalized original source
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#
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# @return [String]
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def original_source
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subject.source
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end
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# Test if mutation is killed by test reports
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#
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# @param [Result::Test] test_result
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#
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# @return [Boolean]
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def self.success?(test_result)
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self::TEST_PASS_SUCCESS.equal?(test_result.passed)
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end
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# Insert mutated node
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#
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# @param kernel [Kernel]
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#
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# @return [self]
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def insert(kernel)
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subject.prepare
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Loader.call(
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binding: TOPLEVEL_BINDING,
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kernel: kernel,
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node: root,
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subject: subject
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)
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self
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end
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private
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# SHA1 sum of source and subject identification
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#
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# @return [String]
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def sha1
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Digest::SHA1.hexdigest(subject.identification + CODE_DELIMITER + source)
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end
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memoize :sha1
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# Mutated root node
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#
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# @return [Parser::AST::Node]
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def root
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subject.context.root(node)
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end
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# Evil mutation that should case mutations to fail tests
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class Evil < self
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SYMBOL = 'evil'.freeze
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TEST_PASS_SUCCESS = false
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end # Evil
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# Neutral mutation that should not cause mutations to fail tests
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class Neutral < self
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SYMBOL = 'neutral'.freeze
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TEST_PASS_SUCCESS = true
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end # Neutral
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# Noop mutation, special case of neutral
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class Noop < Neutral
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SYMBOL = 'noop'.freeze
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TEST_PASS_SUCCESS = true
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end # Noop
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end # Mutation
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end # Mutant
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