I'm a Java Developer but I want to have some experience also with NodeJS. In Java, when i make a function, then i can run this function in a simple way with using tests like below:

    @Autowired
    SomeService service;

    @Test
    public void testGet() {
        SomeDto dto = service.getDto(1L);
        log.info("Retrieved: {}", dto.getName());
    }

Right now I can run only this one test and check that my method work properly. But how to do this with using NodeJS? For example i have this method:

async getData(id: any): Promise<SomeDto> {
   return this.conn.getRepository(Client).findById(id);
}

how to run this method in tests like I'm doing it with Java?

PS. I don't want to create unit test and so on, I want only to run my functions with using tests

thanks for any help!