Spring boot

Application Runner

@Slf4j
public class MyApp implements ApplicationRunner {
    @Override
    public void run(ApplicationArguments args) {
        String username = getValueOrDefault(args, "username", propertyUsername);
        String password = getValueOrDefault(args, "password", propertyPassword);
        String projectUrl = getValueOrDefault(args, "projectUrl", propertyProjectUrl);

        log.info("Using username={}, password={}, projectUrl={}", username, password, projectUrl);
    }

        protected String getValueOrDefault(ApplicationArguments args, String commandLineKey, String defaultValue) {
        if (args.containsOption(commandLineKey) && !args.getOptionValues(commandLineKey).isEmpty()) {
            return args.getOptionValues(commandLineKey).get(0);
        }
        return defaultValue;
    }
}

Test web service

@RunWith(SpringRunner.class)
@WebMvcTest(Controller.class)
public class ControllerUTest {
    @Autowired private MockMvc mockMvc;
    @MockBean private MoveService moveService;
    @MockBean private StartService startService;

    @Test
    public void testMove() throws Exception {
        when(moveService.move(any(BattleSnakeRequest.class)))
            .thenReturn(MoveResponse.builder().move(MOVE.UP)
                .build());
        this.mockMvc
            .perform(
                post("/move")
                    .contentType(MediaType.APPLICATION_JSON)
                    .characterEncoding("UTF-8")
                    .content(getContent("move-request.json"))
            )
            .andExpect(status().isOk())
            .andExpect(content().json("{\"move\":\"up\"}"))
        ;
    }    
}