it('Should serialize the record without XML declaration', () => {
      const expectedRecord = fs.readFileSync(path.resolve(fixturesPath, 'to-no-xml-decl'), 'utf8');
      const sourceRecord = fs.readFileSync(path.resolve(fixturesPath, 'from-no-xml-decl'), 'utf8');
      const record = MarcRecord.fromString(sourceRecord);