108 lines
2.6 KiB
Ruby
108 lines
2.6 KiB
Ruby
module Mutant
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class Matcher
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class Method
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# Matcher for singleton methods
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class Singleton < Method
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private
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# Return method instance
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#
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# @return [UnboundMethod]
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#
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# @api private
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#
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def method
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constant.method(method_name)
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end
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# Return matched node class
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#
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# @return [Rubinius::AST::DefineSingletonScope]
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#
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# @api private
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#
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def node_class
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Rubinius::AST::DefineSingletonScope
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end
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# Check for stopping AST walk on branch
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#
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# This method exist to protect against the
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# artifical edge case where DefineSingleton nodes
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# with differend receivers exist on the same line.
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#
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# @param [Rubnius::AST::Node] node
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#
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# @return [true]
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# returns true when node should NOT be followed
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#
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# @return [false]
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# returns false when node can be followed
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#
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# @api private
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#
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def stop?(node)
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node.is_a?(Rubinius::AST::DefineSingleton) && !match_receiver?(node)
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end
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# Check if receiver matches
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#
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# @param [Rubinius::AST::DefineSingleton] node
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#
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# @return [true]
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# returns true when receiver is self or constant from pattern
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#
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# @return [false]
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# returns false otherwise
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#
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# @api private
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#
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def match_receiver?(node)
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receiver = node.receiver
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case receiver
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when Rubinius::AST::Self
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true
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when Rubinius::AST::ConstantAccess
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match_receiver_name?(receiver)
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else
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raise 'Can only match receiver on Rubinius::AST::Self or Rubinius::AST::ConstantAccess'
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end
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end
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# Check if reciver name matches context
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#
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# @param [Rubinius::AST::Node] node
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#
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# @return [true]
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# returns true when node name matches unqualified constant name
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#
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# @return [false]
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# returns false otherwise
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#
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# @api private
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#
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def match_receiver_name?(node)
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node.name.to_s == context.unqualified_name
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end
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# Return matched node
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#
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# @return [Rubinus::AST::DefineSingletonScope]
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#
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# @api private
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#
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def matched_node
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last_match = nil
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ast.walk do |predicate, node|
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if match?(node)
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last_match = node
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end
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!stop?(node)
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end
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last_match
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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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