Function internalMatch

lib/assert.js:822–852

(string, regexp, message, fn)

};

function internalMatch(string, regexp, message, fn) {
  if (!isRegExp(regexp)) {
    throw new ERR_INVALID_ARG_TYPE(
      'regexp', 'RegExp', regexp,
    );
  }
  const match = fn === Assert.prototype.match;
  if (typeof string !== 'string' ||
      RegExpPrototypeExec(regexp, string) !== null !== match) {

    const generatedMessage = message.length === 0;

    // 'The input was expected to not match the regular expression ' +
    message[0] ||= (typeof string !== 'string' ?
      'The "string" argument must be of type string. Received type ' +
        `${typeof string} (${inspect(string)})` :
      (match ?
        'The input did not match the regular expression ' :
        'The input was expected to not match the regular expression ') +
          `${inspect(regexp)}. Input:\n\n${inspect(string)}\n`);
    innerFail({
      actual: string,
      expected: regexp,
      message,
      operator: fn.name,
      stackStartFn: fn,
      diff: this?.[kOptions]?.diff,
      generatedMessage: generatedMessage,
    });
  }
}

/**
 * Expects the `string` input to match the regular expression.