free_mutant/lib/mutant/mutator/node/binary.rb
Markus Schirp 017ccc1044 Add expression => self mutation
Also reorganizes parts of meta to align filenames to node name better.

Closes #191
2014-06-05 17:48:39 +00:00

58 lines
1.1 KiB
Ruby

# encoding: utf-8
module Mutant
class Mutator
class Node
# Mutation emitter to handle binary connectives
class Binary < self
INVERSE = {
and: :or,
or: :and
}.freeze
handle(*INVERSE.keys)
children :left, :right
private
# Emit mutations
#
# @return [undefined]
#
# @api private
#
def dispatch
emit_singletons
emit(left)
emit(right)
mutate_operator
mutate_operands
end
# Emit operator mutations
#
# @return [undefined]
#
# @api private
#
def mutate_operator
emit(s(INVERSE.fetch(node.type), left, right))
end
# Emit condition mutations
#
# @return [undefined]
#
# @api private
#
def mutate_operands
emit(s(node.type, n_not(left), right))
emit(n_not(node))
end
end # Binary
end # Node
end # Mutator
end # Mutant