61 lines
1.3 KiB
Ruby
61 lines
1.3 KiB
Ruby
module Mutant
|
|
class Mutator
|
|
# Mutator for range literal AST nodes
|
|
class Range < Mutator
|
|
private
|
|
|
|
# Append mutations on range literals
|
|
#
|
|
# @param [#<<] generator
|
|
#
|
|
# @return [undefined]
|
|
#
|
|
# @api private
|
|
#
|
|
def mutants(generator)
|
|
generator << new_nil
|
|
generator << new(Rubinius::AST::RangeExclude,node.start,node.finish)
|
|
generator << new_self(neg_infinity,node.finish)
|
|
generator << new_self(nan,node.finish)
|
|
generator << new_self(node.start,infinity)
|
|
generator << new_self(node.start,nan)
|
|
end
|
|
|
|
# Return AST representing infinity
|
|
#
|
|
# @return [Rubinius::Node::AST]
|
|
#
|
|
# @api private
|
|
#
|
|
def neg_infinity
|
|
'-1.0/0.0'.to_ast.tap do |call|
|
|
call.line = node.line
|
|
end
|
|
end
|
|
|
|
# Return AST representing infinity
|
|
#
|
|
# @return [Rubinius::Node::AST]
|
|
#
|
|
# @api private
|
|
#
|
|
def infinity
|
|
'1.0/0.0'.to_ast.tap do |call|
|
|
call.line = node.line
|
|
end
|
|
end
|
|
|
|
# Return AST representing NaN
|
|
#
|
|
# @return [Rubinius::Node::AST]
|
|
#
|
|
# @api private
|
|
#
|
|
def nan
|
|
'0.0/0.0'.to_ast.tap do |call|
|
|
call.line = node.line
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|