import { describe, expect, it } from 'vitest';
import { compareReimportSourceHashes } from '../../src/domain/reimport-source';

describe('exact reimport source identity', () => {
  const first = 'a'.repeat(64);
  const second = 'b'.repeat(64);

  it('matches only the exact SHA-256 multiset independent of file order', () => {
    expect(compareReimportSourceHashes([first, second], [second, first])).toBe('match');
    expect(compareReimportSourceHashes([first, second], [first])).toBe('mismatch');
    expect(compareReimportSourceHashes([first, second], [first, 'c'.repeat(64)])).toBe('mismatch');
    expect(compareReimportSourceHashes([first, first], [first, second])).toBe('mismatch');
  });

  it('fails closed when the original scan has no complete hash evidence', () => {
    expect(compareReimportSourceHashes([], [first])).toBe('reference-unavailable');
    expect(compareReimportSourceHashes([undefined], [first])).toBe('reference-unavailable');
  });
});