Module: ActiveMutator::Reporter::OperatorStats

Defined in:
lib/active_mutator/reporter/operator_stats.rb

Overview

Per-operator noise signal (issue #20): equivalent_rate = survived / (killed + survived). Every :survived result is covered by construction (uncovered mutants never reach the scheduler), so this is the covered-survivor rate. It deliberately conflates true equivalents with weak assertions — it is an aggregate signal, not a score.

Class Method Summary collapse

Class Method Details

.call(results) ⇒ Object 



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# File 'lib/active_mutator/reporter/operator_stats.rb', line 9

def self.call(results)
  results.group_by { |r| r.mutation.edit.operator }.to_h do |operator, group|
    killed = group.count { |r| r.status == :killed }
    survived = group.count { |r| r.status == :survived }
    denominator = killed + survived
    rate = denominator.zero? ? 0.0 : (survived.to_f / denominator).round(3)
    [operator, { "killed" => killed, "survived" => survived, "equivalent_rate" => rate }]
  end
end