Function createMessageAndCause

packages/expect/src/toThrowMatchers.ts:481–497

(error: Error)

};

function createMessageAndCause(error: Error) {
  if (error.cause) {
    const seen = new WeakSet();
    return JSON.stringify(buildSerializeError(error), (_, value) => {
      if (isObject(value)) {
        if (seen.has(value)) return;
        seen.add(value); // stop circular references
      }
      if (typeof value === 'bigint' || value === undefined) {
        return String(value);
      }
      return value;
    });
  }

  return error.message;
}

function buildSerializeError(error: {[key: string]: any}) {
  if (!isObject(error)) {