158 lines
3.1 KiB
Ruby
158 lines
3.1 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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# Kill mutation under isolation with integration
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#
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# @param [Isolation] isolation
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# @param [Integration] integration
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#
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# @return [Result::Test]
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#
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# @api private
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#
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# rubocop:disable MethodLength
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#
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def kill(isolation, integration)
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start = Time.now
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tests = subject.tests
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isolation.call do
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insert
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integration.call(tests)
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end.update(tests: tests)
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rescue Isolation::Error => error
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Result::Test.new(
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tests: tests,
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output: error.message,
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runtime: Time.now - start,
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passed: false
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)
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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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"#{self.class::SYMBOL}:#{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[CODE_RANGE]
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end
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memoize :code
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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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# Test if mutation is killed by test reports
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#
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# @param [Array<Report::Test>] test_reports
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#
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# @return [Boolean]
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#
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# @api private
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#
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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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private
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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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subject.prepare
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Loader::Eval.call(root, subject)
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self
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end
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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 + CODE_DELIMITER + source)
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end
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memoize :sha1
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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.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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