ef9172bca4
* Move Mutant::Mutator::Generator in a dedicated file * Mutant::Mutator::Generator#append only forwards mutated node when it does not equal original nodes sexpession. This does not catch equivalent mutations, but mutations that exactly reproduce the same AST. This way a check for not generating the same asts can be centralized.
108 lines
1.9 KiB
Ruby
108 lines
1.9 KiB
Ruby
module Mutant
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# Mutate rubinius AST nodes
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class Mutator
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include Enumerable, Veritas::Immutable
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# Build mutation node
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#
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# @param [Rubinius::AST::Node] node
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#
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# @return [Mutator]
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#
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# @api private
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#
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def self.build(node)
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mutator(node).new(node)
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end
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# Return mutator for node or raise
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#
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# @param [Rubinius::AST::Node] node
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#
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# @return [Mutator]
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#
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# @raise [ArgumentError]
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# raises ArgumentError if mutator for node cannot be found
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#
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# @api private
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#
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def self.mutator(node)
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unqualified_name = node.class.name.split('::').last
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const_get(unqualified_name)
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end
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# Enumerate mutated asts
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#
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# @api private
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#
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def each(&block)
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return to_enum unless block_given?
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mutants(Generator.new(@node,block))
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self
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end
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private
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# Return wrapped node
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#
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# @return [Rubinius::AST::Node]
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#
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# @api private
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#
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attr_reader :node
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# Initialize mutator with
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#
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# @param [Rubinius::AST::Node] node
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#
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# @api private
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#
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def initialize(node)
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@node = node
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end
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# Create a new AST node
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#
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# @param [Rubinis::AST::Node:Class] node_class
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#
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# @return [Rubinius::AST::Node]
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#
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# @api private
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#
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def new(node_class,*arguments)
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node_class.new(node.line,*arguments)
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end
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# Create a new AST node with same class as wrapped node
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#
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# @return [Rubinius::AST::Node]
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#
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# @api private
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#
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def new_self(*arguments)
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new(node.class,*arguments)
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end
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# Create a new AST node with NilLiteral class
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#
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# @return [Rubinius::AST::NilLiteral]
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#
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# @api private
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#
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def new_nil
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new(Rubinius::AST::NilLiteral)
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end
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# Append mutations
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#
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# @api private
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#
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# @param [#<<] generator
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#
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# @return [undefined]
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#
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def mutants(generator)
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Mutant.not_implemented(self)
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end
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end
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end
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