4856ed5251
* When concatenating strings together to hash you need to use a
separator that does not exist in the strings, otherwise you can
easily get duplicate hashes, eg:
Digest::SHA1.hexdigest('ab' + 'c') # => "a9993e364706816aba3e25717850c26c9cd0d89d"
Digest::SHA1.hexdigest('a' + 'bc') # => "a9993e364706816aba3e25717850c26c9cd0d89d"
Using a null character as a separator works around this problem:
Digest::SHA1.hexdigest('a' + 0.chr + 'bc') # => "0b2749668f0ea8df8a630da13f0d218709efd5ca"
Digest::SHA1.hexdigest('ab' + 0.chr + 'c') # => "dbdd4f85d8a56500aa5c9c8a0d456f96280c92e5"
126 lines
2 KiB
Ruby
126 lines
2 KiB
Ruby
module Mutant
|
|
# Represent a mutated node with its subject
|
|
class Mutation
|
|
include AbstractType, Adamantium::Flat, Equalizer.new(:sha1)
|
|
|
|
# Initialize mutation object
|
|
#
|
|
# @param [Subject] subject
|
|
# @param [Rubinius::Node::AST] node
|
|
#
|
|
# @return [undefined]
|
|
#
|
|
# @api private
|
|
#
|
|
def initialize(subject, node)
|
|
@subject, @node = subject, node
|
|
end
|
|
|
|
# Return mutation subject
|
|
#
|
|
# @return [Subject]
|
|
#
|
|
# @api private
|
|
#
|
|
attr_reader :subject
|
|
|
|
# Return mutated node
|
|
#
|
|
# @return [Rubinius::AST::Node]
|
|
#
|
|
# @api private
|
|
#
|
|
attr_reader :node
|
|
|
|
# Return mutated root node
|
|
#
|
|
# @return [Rubinius::AST::Node]
|
|
#
|
|
# @api private
|
|
#
|
|
def root
|
|
subject.root(node)
|
|
end
|
|
memoize :root
|
|
|
|
# Test if killer is successful
|
|
#
|
|
# @param [Killer] killer
|
|
#
|
|
# @return [true]
|
|
# if killer is successful
|
|
#
|
|
# @return [false]
|
|
# otherwise
|
|
#
|
|
# @api private
|
|
#
|
|
abstract_method :success?
|
|
|
|
# Insert mutated node
|
|
#
|
|
# @return [self]
|
|
#
|
|
# @api private
|
|
#
|
|
def insert
|
|
Loader::Eval.run(root, subject)
|
|
self
|
|
end
|
|
|
|
# Return identification
|
|
#
|
|
# @return [String]
|
|
#
|
|
# @api private
|
|
#
|
|
def identification
|
|
"#{subject.identification}:#{code}"
|
|
end
|
|
memoize :identification
|
|
|
|
# Return mutation code
|
|
#
|
|
# @return [String]
|
|
#
|
|
# @api private
|
|
#
|
|
def code
|
|
sha1[0..4]
|
|
end
|
|
memoize :code
|
|
|
|
# Return sha1 sum of source and subject identification
|
|
#
|
|
# @return [String]
|
|
#
|
|
# @api private
|
|
#
|
|
def sha1
|
|
Digest::SHA1.hexdigest(subject.identification + 0.chr + source)
|
|
end
|
|
memoize :sha1
|
|
|
|
# Return source
|
|
#
|
|
# @return [String]
|
|
#
|
|
# @api private
|
|
#
|
|
def source
|
|
ToSource.to_source(node)
|
|
end
|
|
memoize :source
|
|
|
|
# Return original source
|
|
#
|
|
# @return [String]
|
|
#
|
|
# @api private
|
|
#
|
|
def original_source
|
|
subject.source
|
|
end
|
|
|
|
end
|
|
end
|