free_mutant/spec/support/mutation_verifier.rb

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# encoding: UTF-8
class MutationVerifier
include Adamantium::Flat, Concord.new(:original_node, :expected, :generated)
# Test if mutation was verified successfully
#
# @return [Boolean]
#
# @api private
#
def success?
unparser.success? && missing.empty? && unexpected.empty?
end
# Return error report
#
# @return [String]
#
# @api private
#
def error_report
unless unparser.success?
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return unparser.report
end
mutation_report
end
private
# Return unexpected mutationso
#
# @return [Array<Parser::AST::Node>]
#
# @api private
#
def unexpected
generated - expected
end
memoize :unexpected
# Return mutation report
#
# @return [String]
#
# @api private
#
def mutation_report
message = ['Original:', original_node.inspect]
if missing.any?
message << 'Missing mutations:'
message << missing.map(&method(:format_mutation)).join("\n-----\n")
end
if unexpected.any?
message << 'Unexpected mutations:'
message << unexpected.map(&method(:format_mutation)).join("\n-----\n")
end
message.join("\n======\n")
end
# Format mutation
#
# @return [String]
#
# @api private
#
def format_mutation(node)
[
node.inspect,
Unparser.unparse(node)
].join("\n")
end
# Return missing mutationso
#
# @return [Array<Parser::AST::Node>]
#
# @api private
#
def missing
expected - generated
end
memoize :missing
# Return unparser verifier
#
# @return [Unparser::CLI::Source]
#
# @api private
#
def unparser
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Unparser::CLI::Source::Node.new(Unparser::Preprocessor.run(original_node))
end
memoize :unparser
end # MutationVerifier