Class: Evilution::Compare::Fingerprint

Inherits:
Object
  • Object
show all
Defined in:
lib/evilution/compare/fingerprint.rb

Overview

Composes a stable SHA256 fingerprint from a mutation diff for cross-tool matching (Evilution vs Mutant). Orchestrates two collaborators along distinct change axes:

- extractor: parses a tool-specific diff format into {minus:, plus:}
- normalizer: collapses whitespace per line so cosmetic differences
              don't perturb the hash

Instance Method Summary collapse

Constructor Details

#initialize(extractor:, normalizer:) ⇒ Fingerprint

Returns a new instance of Fingerprint.



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# File 'lib/evilution/compare/fingerprint.rb', line 14

def initialize(extractor:, normalizer:)
  @extractor = extractor
  @normalizer = normalizer
end

Instance Method Details

#call(diff:, file_path:, line:) ⇒ Object 



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# File 'lib/evilution/compare/fingerprint.rb', line 19

def call(diff:, file_path:, line:)
  body = @extractor.call(diff)
  minus = body[:minus].map { |l| @normalizer.call(l) }
  plus  = body[:plus].map  { |l| @normalizer.call(l) }
  payload = [file_path, line.to_s, minus.join("\n"), plus.join("\n")].join("\x00")
  Digest::SHA256.hexdigest(payload)
end