94 lines
2.0 KiB
Ruby
94 lines
2.0 KiB
Ruby
# frozen_string_literal: true
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module Mutant
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# An abstract context where mutations can be applied to.
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class Context
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include Adamantium::Flat, Concord::Public.new(:scope, :source_path)
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extend AST::Sexp
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NAMESPACE_DELIMITER = '::'
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# Return root node for mutation
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#
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# @return [Parser::AST::Node]
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def root(node)
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nesting.reverse.reduce(node) do |current, scope|
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self.class.wrap(scope, current)
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end
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end
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# Identification string
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#
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# @return [String]
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def identification
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scope.name
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end
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# Wrap node into ast node
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#
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# @param [Class, Module] scope
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# @param [Parser::AST::Node] node
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#
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# @return [Parser::AST::Class]
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# if scope is of kind Class
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#
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# @return [Parser::AST::Module]
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# if scope is of kind module
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def self.wrap(scope, node)
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name = s(:const, nil, scope.name.split(NAMESPACE_DELIMITER).last.to_sym)
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case scope
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when Class
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s(:class, name, nil, node)
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when Module
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s(:module, name, node)
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end
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end
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# Nesting of scope
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#
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# @return [Enumerable<Class,Module>]
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def nesting
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const = Object
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name_nesting.map do |name|
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const = const.const_get(name)
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end
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end
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memoize :nesting
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# Unqualified name of scope
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#
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# @return [String]
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def unqualified_name
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name_nesting.last
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end
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# Match expressions for scope
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#
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# @return [Enumerable<Expression>]
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def match_expressions
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name_nesting.each_index.reverse_each.map do |index|
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Expression::Namespace::Recursive.new(
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scope_name: name_nesting.take(index.succ).join(NAMESPACE_DELIMITER)
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)
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end
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end
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memoize :match_expressions
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# Scope wrapped by context
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#
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# @return [Module|Class]
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attr_reader :scope
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private
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# Nesting of names in scope
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#
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# @return [Array<String>]
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def name_nesting
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scope.name.split(NAMESPACE_DELIMITER)
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end
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memoize :name_nesting
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end # Context
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end # Mutant
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