class Mutest::Mutator::Node::Arguments

Mutator for arguments node

Private Instance Methods

dispatch() click to toggle source

Emit mutations

@return [undefined]

# File lib/mutest/mutator/node/arguments.rb, line 13
def dispatch
  emit_argument_presence
  emit_argument_mutations
  emit_hash_type_hint
  emit_mlhs_expansion
end
emit_argument_mutations() click to toggle source

Emit argument mutations

@return [undefined]

# File lib/mutest/mutator/node/arguments.rb, line 45
def emit_argument_mutations
  children.each_with_index do |child, index|
    mutate(child).each do |mutest|
      next if invalid_argument_replacement?(mutest, index)

      emit_child_update(index, mutest)
    end
  end
end
emit_argument_presence() click to toggle source

Emit argument presence mutation

@return [undefined]

# File lib/mutest/mutator/node/arguments.rb, line 23
def emit_argument_presence
  emit_type

  mutate_with(Util::Array::Presence, children) do |children|
    if children.one? && n_mlhs?(Mutest::Util.one(children))
      emit_procarg(Mutest::Util.one(children))
    else
      emit_type(*children)
    end
  end
end
emit_hash_type_hint() click to toggle source
# File lib/mutest/mutator/node/arguments.rb, line 64
def emit_hash_type_hint
  *first_args, last_arg = children

  return unless last_arg && hintworthy_node?(last_arg)

  last_name = last_arg.children.first

  emit_type(*first_args, s(:kwrestarg, last_name)) unless last_name.to_s.start_with?('_')
end
emit_mlhs_expansion() click to toggle source

Emit mlhs expansions

@return [undefined]

# File lib/mutest/mutator/node/arguments.rb, line 83
def emit_mlhs_expansion
  mlhs_childs_with_index.each do |child, index|
    dup_children = children.dup
    dup_children.delete_at(index)
    dup_children.insert(index, *child)
    emit_type(*dup_children)
  end
end
emit_procarg(arg) click to toggle source

Emit procarg form

@return [undefined]

# File lib/mutest/mutator/node/arguments.rb, line 38
def emit_procarg(arg)
  emit_type(s(:procarg0, *arg))
end
hintworthy_node?(node) click to toggle source

Is this a simple arg or arg={} ?

# File lib/mutest/mutator/node/arguments.rb, line 75
def hintworthy_node?(node)
  n_arg?(node) ||
    (n_optarg?(node) && node.children.last.eql?(s(:hash)))
end
invalid_argument_replacement?(mutest, index) click to toggle source

Test if child mutation is allowed

@param [Parser::AST::Node]

@return [Boolean]

# File lib/mutest/mutator/node/arguments.rb, line 60
def invalid_argument_replacement?(mutest, index)
  n_arg?(mutest) && children[0...index].any?(&method(:n_optarg?))
end
mlhs_childs_with_index() click to toggle source

Multiple left hand side childs

@return [Enumerable<Parser::AST::Node, Integer>]

# File lib/mutest/mutator/node/arguments.rb, line 95
def mlhs_childs_with_index
  children.each_with_index.select do |child, _index|
    n_mlhs?(child)
  end
end