Given this pipe code snippet, what will happen if a user uploads a file larger than 1MB?

Given this pipe code snippet, what will happen if a user uploads a file larger than 1MB?

export class FileValidationPipe implements PipeTransform {
  transform(file: Express.Multer.File) {
    if (!file) throw new BadRequestException('File is required');
    if (file.size > 1_000_000) throw new BadRequestException('File too large');
    return file;
  }
}