Class: Henitai::Operators::ArithmeticOperator

Inherits:
Henitai::Operator show all
Defined in:
lib/henitai/operators/arithmetic_operator.rb

Overview

Replaces arithmetic operators with their mutation counterparts.

Constant Summary collapse

NODE_TYPES = 
[:send].freeze
MUTATION_MATRIX = 
{
  :+ => :-,
  :- => :+,
  :* => :/,
  :/ => :*,
  :** => :*,
  :% => :*
}.freeze

Constants inherited from Henitai::Operator

Henitai::Operator::FULL_SET, Henitai::Operator::LIGHT_SET

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Henitai::Operator

for_set, #name

Class Method Details

.node_types ⇒ Object 



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# File 'lib/henitai/operators/arithmetic_operator.rb', line 19

def self.node_types
  NODE_TYPES
end

Instance Method Details

#mutate(node, subject:) ⇒ Object 



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# File 'lib/henitai/operators/arithmetic_operator.rb', line 23

def mutate(node, subject:)
  replacement = MUTATION_MATRIX[node.children[1]]
  return [] unless replacement

  [
    build_mutant(
      subject:,
      original_node: node,
      mutated_node: mutated_node(node, replacement),
      description: "replaced #{node.children[1]} with #{replacement}"
    )
  ]
end