free_mutant/lib/mutant/matcher/method/instance.rb
2014-06-15 19:28:57 +00:00

78 lines
1.9 KiB
Ruby

module Mutant
class Matcher
class Method
# Matcher for instance methods
class Instance < self
SUBJECT_CLASS = Subject::Method::Instance
# Dispatching builder, detects memoizable case
#
# @param [Cache] cache
# @param [Class, Module] scope
# @param [UnboundMethod] method
#
# @return [Matcher::Method::Instance]
#
# @api private
#
def self.build(cache, scope, method)
name = method.name
if scope.ancestors.include?(::Memoizable) && scope.memoized?(name)
return Memoized.new(cache, scope, method)
end
super
end
# Return identification
#
# @return [String]
#
# @api private
#
def identification
"#{scope.name}##{method_name}"
end
memoize :identification
NAME_INDEX = 0
private
# Check if node is matched
#
# @param [Parser::AST::Node] node
#
# @return [Boolean]
#
# @api private
#
def match?(node)
location = node.location || return
expression = location.expression || return
expression.line == source_line &&
node.type == :def &&
node.children[NAME_INDEX] == method_name
end
# Matcher for memoized instance methods
class Memoized < self
SUBJECT_CLASS = Subject::Method::Instance::Memoized
private
# Return source location
#
# @return [Array]
#
# @api private
#
def source_location
scope.unmemoized_instance_method(method.name).source_location
end
end # Memoized
end # Instance
end # Method
end # Matcher
end # Mutant