138 lines
2.8 KiB
Ruby
138 lines
2.8 KiB
Ruby
module Mutant
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class Context
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# Scope context for mutation (Class or Module)
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class Scope < self
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include Adamantium::Flat, AbstractClass, Equalizer.new(:scope, :source_path)
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# Class context for mutation
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class Class < self
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SCOPE_CLASS = Rubinius::AST::ClassScope
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KEYWORD = 'class'.freeze
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end
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# Module context for mutation
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class Module < self
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SCOPE_CLASS = Rubinius::AST::ModuleScope
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KEYWORD = 'module'.freeze
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end
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TABLE = {
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::Module => Module,
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::Class => Class
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}.freeze
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# Build scope context from class or module
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#
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# @param [String] source_path
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#
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# @param [::Class|::Module] scope
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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 self.build(scope, source_path)
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scope_class = scope.class
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klass = TABLE.fetch(scope_class) do
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raise ArgumentError, "Can only build mutation scope from class or module got: #{scope_class.inspect}"
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end.new(scope, source_path)
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end
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# Return AST wrapping mutated node
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#
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# @return [Rubinius::AST::Script]
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#
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# @api private
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#
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def root(node)
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root = root_ast
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block = Rubinius::AST::Block.new(1, [node])
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root.body = scope_class.new(1, root.name, block)
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root
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end
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# Return unqualified name of scope
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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 unqualified_name
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name_nesting.last
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end
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# Return scope wrapped by context
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#
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# @return [::Module|::Class]
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#
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# @api private
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#
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attr_reader :scope
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private
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# Initialize object
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#
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# @param [Object] scope
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# @param [String] source_path
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#
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# @api private
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#
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def initialize(scope, source_path)
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super(source_path)
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@scope = scope
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end
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# Return scope AST class
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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 scope_class
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self.class::SCOPE_CLASS
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end
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# Return keyword
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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 keyword
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self.class::KEYWORD
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end
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# Return new root 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 root_ast
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"#{keyword} #{qualified_name}; end".to_ast
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end
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# Return qualified name of scope
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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 qualified_name
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scope.name
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end
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# Return nesting of names of scope
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#
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# @return [Array<String>]
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#
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# @api private
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#
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def name_nesting
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scope.name.split('::')
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end
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memoize :name_nesting
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end
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end
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end
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