8a4fad0973
* This makes it far more likely the elements are used in paralel assignment. Credits for idea @snusnu!
89 lines
1.9 KiB
Ruby
89 lines
1.9 KiB
Ruby
module Mutant
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class Mutator
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class Node
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class Literal
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# Mutator for hash literals
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class Hash < self
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handle(Rubinius::AST::HashLiteral)
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private
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# Emit 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 dispatch
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emit_nil
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emit_values(values)
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emit_element_presence
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emit_body
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end
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# Emit body 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_body
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array.each_with_index do |element, index|
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dup = dup_array
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Mutator.each(element).each do |mutation|
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dup[index]=mutation
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emit_self(dup)
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end
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end
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end
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# Return array of values in literal
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#
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# @return [Array]
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#
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# @api private
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#
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def array
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node.array
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end
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# Return duplicate of array values in literal
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#
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# @return [Array]
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#
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# @api private
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#
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def dup_array
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array.dup
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end
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# Return values to mutate against
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#
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# @return [Array]
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#
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# @api private
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#
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def values
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[[], [new_nil, new_nil] + dup_array]
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end
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# Emit element presence 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_element_presence
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0.step(array.length-1, 2) do |index|
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contents = dup_array
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contents.delete_at(index)
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contents.delete_at(index)
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emit_self(contents)
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end
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end
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end
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end
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end
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end
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end
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