Function formatExecError

packages/jest-message-util/src/index.ts:125–233

(
  error: Error | TestResult.SerializableError | string | number | undefined,
  config: StackTraceConfig,
  options: StackTraceOptions,
  testPath?: string,
  reuseMessage?: boolean,
  noTitle?: boolean,
)

// `before/after each` hooks). If it's thrown, none of the tests in the file
// are executed.
export const formatExecError = (
  error: Error | TestResult.SerializableError | string | number | undefined,
  config: StackTraceConfig,
  options: StackTraceOptions,
  testPath?: string,
  reuseMessage?: boolean,
  noTitle?: boolean,
): string => {
  if (!error || typeof error === 'number') {
    error = new Error(`Expected an Error, but "${String(error)}" was thrown`);
    error.stack = '';
  }

  let message, stack;
  let cause = '';
  const subErrors = [];

  if (typeof error === 'string' || !error) {
    error ||= 'EMPTY ERROR';
    message = '';
    stack = error;
  } else {
    message = error.message;
    stack =
      typeof error.stack === 'string'
        ? error.stack
        : `thrown: ${prettyFormat(error, {maxDepth: 3})}`;
    if ('cause' in error) {
      const prefix = '\n\nCause:\n';
      if (typeof error.cause === 'string' || typeof error.cause === 'number') {
        cause += `${prefix}${error.cause}`;
      } else if (isError(error.cause) || error.cause instanceof Error) {
        /* `isError` is used, because the error might come from another realm.
         `instanceof Error` is used because `isError` does return `false` for some
         things that are `instanceof Error` like the errors provided in
         [verror](https://www.npmjs.com/package/verror) or [axios](https://axios-http.com).
        */
        const formatted = formatExecError(
          error.cause,
          config,
          options,
          testPath,
          reuseMessage,
          true,
        );
        cause += `${prefix}${formatted}`;
      }
    }
    if ('errors' in error && Array.isArray(error.errors)) {
      for (const subError of error.errors) {
        subErrors.push(
          formatExecError(
            subError,
            config,
            options,
            testPath,
            reuseMessage,
            true,