Function getSnapshotData

packages/jest-snapshot-utils/src/utils.ts:133–165

(
  snapshotPath: string,
  update: Config.SnapshotUpdateState,
)

};

export const getSnapshotData = (
  snapshotPath: string,
  update: Config.SnapshotUpdateState,
): {
  data: SnapshotData;
  dirty: boolean;
} => {
  const data = Object.create(null);
  let snapshotContents = '';
  let dirty = false;

  if (fs.existsSync(snapshotPath)) {
    try {
      snapshotContents = fs.readFileSync(snapshotPath, 'utf8');
      // eslint-disable-next-line no-new-func
      const populate = new Function('exports', snapshotContents);
      populate(data);
    } catch {}
  }

  const validationResult = validateSnapshotHeader(snapshotContents);
  const isInvalid = snapshotContents && validationResult;

  if (update === 'none' && isInvalid) {
    throw validationResult;
  }

  if ((update === 'all' || update === 'new') && isInvalid) {
    dirty = true;
  }

  return {data, dirty};
};

export const escapeBacktickString = (str: string): string =>
  str.replaceAll(/`|\\|\${/g, '\\$&');