148 lines
2.8 KiB
Ruby
148 lines
2.8 KiB
Ruby
module Mutant
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class Matcher
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# Matcher for subjects that are a specific method
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class Method < self
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include Adamantium::Flat, Concord.new(:scope, :method)
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# Methods within rbx kernel directory are precompiled and their source
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# cannot be accessed via reading source location
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BLACKLIST = /\Akernel\//.freeze
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# Enumerate matches
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#
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# @return [Enumerable]
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# returns enumerable when no block given
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#
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# @return [self]
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# returns self when block given
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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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return self if skip?
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util = subject
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yield util if util
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self
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end
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private
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# Test if method is skipped
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#
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# @return [true]
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# true and print warning if location must be filtered
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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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location = source_location
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if location.nil? or BLACKLIST.match(location.first)
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$stderr.puts "#{method.inspect} does not have valid source location so mutant is unable to emit matcher"
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return true
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end
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false
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end
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# Return method name
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#
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# @return [String]
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#
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# @api private
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#
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def method_name
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method.name
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end
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# Return context
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#
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# @return [Context::Scope]
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#
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# @api private
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#
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def context
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Context::Scope.new(scope, source_path)
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end
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# Return full ast
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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 ast
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File.read(source_path).to_ast
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end
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# Return path to source
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#
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# @return [String]
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#
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# @api private
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#
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def source_path
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source_location.first
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end
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# Return source file line
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#
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# @return [Integer]
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#
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# @api private
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#
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def source_line
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source_location.last
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end
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# Return source location
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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 source_location
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method.source_location
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end
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# Return subject
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#
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# @return [Subject]
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# returns subject if there is a matched node
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#
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# @return [nil]
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# otherwise
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#
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# @api private
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#
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def subject
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node = matched_node
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return unless node
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self.class::SUBJECT_CLASS.new(context, node)
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end
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memoize :subject
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# Return matched node
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#
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# @return [Rubinus::AST::Node]
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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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last_match = node if match?(node)
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predicate
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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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