109 lines
2 KiB
Ruby
109 lines
2 KiB
Ruby
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module Mutant
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class Mutator
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class Node
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# Mutator for required arguments
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class Argument < self
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handle(:arg)
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UNDERSCORE = '_'.freeze
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NAME_INDEX = 0
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private
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# Perform dispatch
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#
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# @return [undefined]
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#
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# @api private
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#
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def dispatch
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return if skip?
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emit_name_mutation
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end
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# Emit name mutations
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#
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# @return [undefined]
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#
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# @api private
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#
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def emit_name_mutation
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Mutator::Util::Symbol.each(name) do |name|
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emit_child_update(NAME_INDEX, name)
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end
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end
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# Return name
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#
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# @return [Symbol]
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#
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# @api private
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#
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def name
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children[NAME_INDEX]
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end
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protected :name
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# Test if argument mutation is skipped
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#
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# @return [true]
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# if argument should not get mutated
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#
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# @return [false]
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# otherwise
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#
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# @api private
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#
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def skip?
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name.to_s.start_with?(UNDERSCORE)
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end
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# Mutator for optional arguments
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class Optional < self
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handle(:optarg)
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DEFAULT_INDEX = 1
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private
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# Perform dispatch
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#
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# @return [undefined]
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#
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# @api private
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#
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def dispatch
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emit_name_mutation
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emit_required_mutation
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emit_default_mutations
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end
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# Emit required mutation
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#
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# @return [undefined]
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#
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# @api private
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#
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def emit_required_mutation
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emit(s(:arg, name))
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end
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# Emit default mutations
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#
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# @return [undefined]
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#
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# @api private
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#
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def emit_default_mutations
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mutate_child(DEFAULT_INDEX)
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end
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end # Optional
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end # Argument
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end # Node
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end # Mutator
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end # Mutant
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