10c3dfc390
* Add tests for all edge cases I could create * Add infrastructure for loading mutations into the vm. * The fun part is next!
106 lines
2.2 KiB
Ruby
106 lines
2.2 KiB
Ruby
module Mutant
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class Context
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# Constant context for mutation (Class or Module)
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class Constant < Context
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include Veritas::Immutable
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private_class_method :new
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TABLE = {
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::Class => ['class', Rubinius::AST::ClassScope],
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::Module => ['module', Rubinius::AST::ModuleScope]
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}.freeze
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# Build constant from class or module
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#
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# @param [::Class|::Module] value
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#
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# @return [Constant]
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#
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# @api private
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#
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def self.build(value)
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arguments = TABLE.fetch(value.class) do
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raise ArgumentError, 'Can only build constant mutation scope from class or module'
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end
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new(value,*arguments)
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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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root.body = [@scope_class.new(1,root.name,[node])]
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Rubinius::AST::Script.new(root)
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end
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# Return unqualified name of constant
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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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private
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# Return constant 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 :constant
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private :constant
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# Initialize object
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#
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# @param [Object] constant
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#
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# @api private
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#
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def initialize(constant,keyword,scope_class)
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@constant,@keyword,@scope_class = constant,keyword,scope_class
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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 constant
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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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@constant.name
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end
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# Return nesting of names of constant
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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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@constant.name.split('::')
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end
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memoize :unqualified_name
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end
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end
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end
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