Class: SixthSense::Analyzers::AdequacyMutation

Inherits:
SixthSense::Analyzer show all
Defined in:
lib/sixth_sense/analyzers/adequacy_mutation.rb

Instance Method Summary collapse

Methods inherited from SixthSense::Analyzer

analyzer_id, axis, inherited, level, reference, references

Instance Method Details

#analyze(test_file, context) ⇒ Object

Paper basis: Jia/Harman 2011 (doi:10.1109/TSE.2010.62) defines mutation score; Just et al. 2014 (doi:10.1145/2635868.2635929) supports mutants as a proxy for real fault detection.



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# File 'lib/sixth_sense/analyzers/adequacy_mutation.rb', line 26

def analyze(test_file, context)
  matrix = context.kill_matrix_for(test_file)
  return no_subjects(test_file) if !matrix && test_file.sut_candidates.empty?
  if matrix && !matrix.mutation_score
    return result(score: nil, measured: false, confidence: :low, findings: operational_findings(matrix, context))
  end
  return unmeasured(confidence: :low) unless matrix&.mutation_score

  findings = operational_findings(matrix, context)
  findings.concat(matrix.surviving_mutants.map do |mutant|
    finding(
      rule_id: mutant.status.to_s == "timeout" ? "mutation_timeout" : "surviving_mutant",
      severity: :warning,
      location: mutant.location,
      message: mutant_message(mutant),
      suggestion: mutant_suggestion(mutant)
    )
  end)

  result(score: (matrix.mutation_score * 100.0).round(2), findings: findings, confidence: confidence_for(matrix))
end