Spring Boot application properties @Value

I'm trying to create a simple Spring Boot Application, creating a GET using resttemplate.getForObject and instead of hard coding the url within the parameter, I want to create a string and leverage @Value to call the url from application.properties. I've checked videos and the board (https://stackoverflow.com/questions/53482633/value-in-springboot-returns-null) and every time I run my JUnit test the endpoint is null. I was wondering if someone can take a look at my code and point out what am I doing incorrectly, why is @Value always null and what can I do to fix this?

@SpringBootApplication
public class NhlTeamsApplication {
public static void main(String[] args) {
SpringApplication.run(NhlTeamsApplication.class, args);
}
}
//my controller
public class NhlTeamsController {
@Autowired
private NhlTeamsService nhlTeamsService;
@RequestMapping(method = RequestMethod.GET, value = "/requestAllTeams")
public @ResponseBody String requestAllTeams() {
return nhlTeamsService.allTeamsService();
}
}
//my interface
@Component
public interface NhlTeamsService {
String allTeamsService();
}
//implementation
@Service
@Data
@Configuration
@PropertySource("classpath:application.properties")
public class NhlTeamsServiceImpl implements NhlTeamsService{
@Value("${nhl.endpoint}")
private String endpoint;
@Override
public String allTeamsService() {
RestTemplate restTemplate = new RestTemplate();
return restTemplate.getForObject(getEndpoint(), String.class);
}
}
//application.properties
nhl.endpoint=https://statsapi.web.nhl.com/api/v1/teams
//JUnitTest
@Test
public void nhlAllTeamsTest(){
NhlTeamsServiceImpl nhlTeamsService = new NhlTeamsServiceImpl();
System.out.println(nhlTeamsService.allTeamsService());
}

Am I missing any annotations? Any insight is greatly appreciated.

When you running tests that time you create a new object of NhlTeamsServiceImpl.
But in spring have spring container inside that at run time spring had to initialize that object with all variable & stored.

So when you create a new object it will initialize of spring container & in that it doesn't have to initialize all required thing as @value variable

so do one thing in test case class modified as follows,

class junit{
@Autowired
public NhlTeamsServiceImpl nhlTeamsServiceImpl;
//JUnitTest
@Test
public void nhlAllTeamsTest(){
//NhlTeamsServiceImpl nhlTeamsService = new NhlTeamsServiceImpl();
System.out.println(nhlTeamsService.allTeamsService());
}
}

So it will work.

Find below the working snap.

& same working code add here https://github.com/MaheshMore4321/RunTestCases