Function compareObjects

packages/jest-diff/src/index.ts:137–168

(
  a: Record<string, any>,
  b: Record<string, any>,
  options?: DiffOptions,
)

}

function compareObjects(
  a: Record<string, any>,
  b: Record<string, any>,
  options?: DiffOptions,
) {
  let difference;
  let hasThrown = false;

  try {
    const formatOptions = getFormatOptions(FORMAT_OPTIONS, options);
    difference = getObjectsDifference(a, b, formatOptions, options);
  } catch {
    hasThrown = true;
  }

  const noDiffMessage = getCommonMessage(NO_DIFF_MESSAGE, options);
  // If the comparison yields no results, compare again but this time
  // without calling `toJSON`. It's also possible that toJSON might throw.
  if (difference === undefined || difference === noDiffMessage) {
    const formatOptions = getFormatOptions(FALLBACK_FORMAT_OPTIONS, options);
    difference = getObjectsDifference(a, b, formatOptions, options);

    if (difference !== noDiffMessage && !hasThrown) {
      difference = `${getCommonMessage(
        SIMILAR_MESSAGE,
        options,
      )}\n\n${difference}`;
    }
  }

  return difference;
}

function getFormatOptions(
  formatOptions: PrettyFormatOptions,