475512146f
* Add emit_nil to other nodes so that they can be replaced with nil, effectively removing them from the code.
62 lines
1.2 KiB
Ruby
62 lines
1.2 KiB
Ruby
# encoding: utf-8
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module Mutant
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class Mutator
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class Node
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# Mutator for case nodes
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class Case < self
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handle(:case)
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children :condition
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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_condition_mutations
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emit_when_mutations
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emit_else_mutations
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emit_nil
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end
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# Emit when 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_when_mutations
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indices = children.each_index.drop(1).take(children.length - 2)
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one = indices.one?
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indices.each do |index|
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mutate_child(index)
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delete_child(index) unless one
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end
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end
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# Emit else 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_else_mutations
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else_branch = children.last
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else_index = children.length - 1
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if else_branch
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mutate_child(else_index)
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emit_child_update(else_index, nil)
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end
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end
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end # Case
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end # Node
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end # Mutator
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end # Mutant
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