Class: SixthSense::Analyzers::AdequacyCoverage

Inherits:
SixthSense::Analyzer show all
Defined in:
lib/sixth_sense/analyzers/adequacy_coverage.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: Zhu/Hall/May 1997 (doi:10.1145/267580.267590) surveys coverage adequacy criteria; branch coverage is preferred when present.



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# File 'lib/sixth_sense/analyzers/adequacy_coverage.rb', line 25

def analyze(test_file, context)
  coverage = context.coverage_map_for(test_file)
  return unmeasured(confidence: :low) unless coverage

  branch_ratio = coverage.branch_coverage_ratio
  line_ratio = coverage.line_coverage_ratio
  ratio = branch_ratio || line_ratio
  return unmeasured(confidence: :low) unless ratio

  score = (score_ratio(ratio, context) * 100.0).round(2)
  confidence = branch_ratio ? :medium : :low
  findings = []
  if ratio < 0.8
    findings << finding(
      rule_id: "low_coverage",
      severity: :warning,
      location: test_file.test_cases.first&.location,
      message: "Coverage ratio is #{(ratio * 100).round(1)}%.",
      suggestion: "Add tests for unexecuted branches before relying on adequacy scores."
    )
  end

  result(score: score, findings: findings, confidence: confidence)
end